Answer:
x^3 + 16x^2 + 64x First, we need to check if there is a greatest common factor (GCF) that we can factor out. In this case, we can factor out "x" since it is a common factor in all the terms: x(x^2 + 16x + 64) Now, we need to factor the quadratic trinomial inside the parentheses. We can do this by finding two numbers that multiply to 64 and add up to 16. These numbers are 8 and 8: x(x + 8)(x + 8) Therefore, the factored form of the trinomial expression is: x(x + 8)^2 I hope this helps!
0 / 350
Triangle FDE is a rotation.
For given triangles, Condition 3 and 6 are true.
What is a triangle's definition?
A triangle is a closed two-dimensional shape with three straight sides, three angles, and three vertices (or corners). It is formed by connecting three non-collinear points in a plane with straight lines. The sum of the interior angles of a triangle is always 180 degrees, and each exterior angle is equal to the sum of its two adjacent interior angles. Triangles can be classified based on the length of their sides and the size of their angles, such as equilateral, isosceles, scalene, acute, right, and obtuse triangles.
Now,
As we can see that ΔABC is rotated 90° clockwise to make
ΔDEF.
So, the angles follows these conditions
∠F=∠A
∠E=∠C
∠D=∠B
hence,
Condition 3 and 6 are true.
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The ratio of campers to counselors at a summer camp is 8:1,which means…
Answer: There are 8 campers for every 1 counselor.
Step-by-step explanation:
A ratio is relation in number between two things. 8:1 means that there are 8 ___s for every 1 ____.
Every year on her birthday, Addie measured her height. On her 5th birthday, she was 44 ⅘ inches tall. Each year, Addie grew ⅖ inch. How tall was Addie on her 12th birthday?
Answer:
Step-by-step explanation:
What is the surface area of a right circular cone with a diameter of 8 m, height of 6.9 m, and a slant height of 18.5 m? Round your answer to the nearest whole.
The surface area of a right circular cone can be found using the formula:
A = πr²+ πrl
where r is the radius of the base, l is the slant height, and π is approximately 3.14159.
In this case, the diameter of the base is 8 m, so the radius is 4 m. The slant height is 18.5 m. The height is not needed for this calculation.
Substituting the given values, we get:
A = π(4 m)² + π(4 m)(18.5 m)
A = π(16 m²) + π(74 m²)
A = π(90 m²)
Using the approximation π ≈ 3.14159, we get:
A ≈ 282.74 m²
Therefore, the surface area of the right circular cone is approximately 283 m² rounded to the nearest whole.
Without making any calculations, which distribution of data has the largest standard deviation?
O 1, 1, 1, 1, 4, 4, 7,7,7,7
O 1, 1, 1, 4, 4, 4, 4,7,7,7
O 1, 1, 4, 4, 4, 4, 4, 4, 7, 7
O 1, 4, 4, 4, 4, 4, 4, 4, 4, 7
a₁ = 20, r=-3, n = 6
Oa. 4860
Ob. -4860
Oc. -300
Od. -360
Find An for each geometric sequence
Answer:
-4860
Step-by-step explanation:
The formula for finding the nth term (An) of a geometric sequence is;
An = a₁ * r^(n-1)
where a₁ is the first term, r is the common ratio, and n is the number of terms.
Plugging in the given values, we have;
An = 20 * (-3)^(6-1)
An = 20 * (-3)^5
An = 20 * (-243)
An = -4860
Therefore, the answer is (Ob) -4860
Leonardo da Vinci wrote, "When each of two squares touch the same circle at four points, one is double the other." Explain why the statement is true.
For each of the figures write an absolute value equation that has the following solution set.
To write an absolute value Equation for a given solution set, we need to use the appropriate formula depending on the nature of the solution set.
To write an absolute value equation for a given solution set, we need to first understand what absolute value is. Absolute value is a mathematical function that returns the positive value of a given number, irrespective of its sign. For example, the absolute value of -5 is 5, and the absolute value of 5 is also 5. Now, let's consider the given figures and their respective solution sets:
Figure 1: The solution set for this figure is {2, -2}. To write an absolute value equation for this solution set, we can use the formula |x| = a, where a is the value of the solution set. Therefore, the absolute value equation for this figure is |x| = 2.
Figure 2: The solution set for this figure is {5}. To write an absolute value equation for this solution set, we can use the formula |x - b| = a, where b is the midpoint of the solution set and a is the distance from the midpoint to one of the solutions. Therefore, the absolute value equation for this figure is |x - 5| = 0.
Figure 3: The solution set for this figure is {-3, 3}. To write an absolute value equation for this solution set, we can again use the formula |x| = a, where a is the value of the solution set. Therefore, the absolute value equation for this figure is |x| = 3.
In conclusion, to write an absolute value equation for a given solution set, we need to use the appropriate formula depending on the nature of the solution set.
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can someone please help thank you
The probability of choosing a password with no Y's and O's is 20/30 = 2/3, or approximately 0.667. The two probabilities are the same, so neither is greater than the other.
Describe Probability?Probability is a measure of the likelihood or chance that an event will occur. It is expressed as a number between 0 and 1, where 0 represents an impossible event and 1 represents a certain event.
In mathematical terms, probability is calculated as the ratio of the number of favorable outcomes to the total number of possible outcomes. For example, if you flip a fair coin, the probability of getting heads is 0.5, because there is one favorable outcome (heads) out of two possible outcomes (heads or tails).
To calculate the probability of choosing a password with no Y's or no O's, we need to first count the number of valid passwords without Y's or O's and then divide it by the total number of possible passwords.
Number of valid passwords without Y's:
There are 5 choices for the first character (B, R, O, G, P), since Y is not allowed.
There are 4 choices for the second character (any of the remaining 5 letters except Y), since we cannot repeat the first letter.
So the total number of valid passwords without Y's is 5 x 4 = 20.
Number of valid passwords without O's:
There are 5 choices for the first character (Y, B, R, G, P), since O is not allowed.
There are 4 choices for the second character (any of the remaining 5 letters except O), since we cannot repeat the first letter.
So the total number of valid passwords without O's is 5 x 4 = 20.
The total number of possible passwords is the number of ways to choose 2 characters out of 6, without repetition. This is given by the formula:
6P2 = 6! / (6 - 2)! = 6 x 5 = 30
Therefore, the probability of choosing a password with no Y's is 20/30 = 2/3, or approximately 0.667.
Similarly, the probability of choosing a password with no O's is also 20/30 = 2/3, or approximately 0.667.
The two probabilities are the same, so neither is greater than the other.
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what is the slope of these pionts ( 7,-2) (1,-6)
Answer:
m = 2/3
Step-by-step explanation:
Given two points on a line, we can find the slope, m, of a linear equation using the slope formula:
[tex]m=\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex], where x1 and y1 are one point and x2 and y2 are the other point.
The order of the points don't matter as long you pair the points already together (e.g., if you choose 7 as x1, you have to choose -2 as y2, and if you choose 1 as x1, you have to choose -6 as y2).
Thus, if we allow the first point to be x1 and y2 and the second point to be x2 and y2, our slope is:
[tex]m=\frac{-6-(=2)}{1-7}\\ \\m=\frac{-6+2}{-6}\\ \\m=\frac{-4}{-6}\\ \\m=\frac{2}{3}[/tex]
A field has a walkway surrounding it by 3 sides. The total width/base of the area, both the field and walkway, is 300m while the total length is 200m. The area of the field is 30,000m and the total area is 60,000m. The thickness/width of the walkway is x, what does x equal?
Answer:
x = 15.
Therefore, the width of the walkway is 15m.
Step-by-step explanation:
Let's represent the width of the walkway by "x".
We know that the total width/base of the area (including the walkway) is 300m, so we can set up the equation:
length of field + 2(width of field) + 2(width of walkway) = 300
Substituting the given values, we get:
200 + 2w + 2x = 300
Simplifying the equation, we get:
2w + 2x = 100
We also know that the area of the field is 30,000m, so we can set up the equation:
length of field x width of field = 30,000
Substituting the given values, we get:
200w = 30,000
Simplifying the equation, we get:
w = 150
Finally, we know that the total area (including the walkway) is 60,000m, so we can set up the equation:
(length of field + 2x) x (width of field + 2x) = 60,000
Substituting the values we've found so far, we get:
(200 + 2x) x (150 + 2x) = 60,000
Expanding the equation, we get:
300x^2 + 1000x - 45,000 = 0
Solving for x using the quadratic formula, we get:
x = 15 or x = -30/100
Since x can't be negative, we can discard the negative solution and conclude that x = 15.
Therefore, the width of the walkway is 15m.
What is the probability that Karen's second card will be a black card?
The probability that Karen's second card will be a black card is 3/650.
How to determine probability?After Sandra deals Karen a red seven, there are 51 cards remaining in the deck, of which 26 are black cards. So the probability of Karen drawing a black card on her second draw depends on whether or not the first card she drew was black or red:
If the first card Karen drew was black, then there are 25 black cards left in the deck out of 50 cards, since one card has already been drawn. So the probability of Karen drawing a black card on her second draw is 25/50 = 1/2.
If the first card Karen drew was red, then there are still 26 black cards left in the deck out of 50 cards, since one card has already been drawn. So the probability of Karen drawing a black card on her second draw is 26/50 = 13/25.
Since there are 26 red cards and 26 black cards in a standard deck of playing cards, the probability of Karen being dealt a red seven by Sandra is 2/52 = 1/26.
To find the overall probability of Karen being dealt a red seven and then drawing a black card on her second draw, multiply the probability of these two events occurring:
P(red seven and black card) = P(red seven) × P(black card on second draw | red seven)
P(red seven) = 1/26
P(black card on second draw | red seven) = 13/25
P(red seven and black card) = (1/26) × (13/25) = 13/650
Therefore, the probability of Karen's second card being a black card, given that Sandra dealt her a red seven, is 13/650.
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The complete question:
Sandra and Karen are playing a game of cards with a standard deck of playing cards. Sandra deals Karen a red seven. What is the probability that Karen’s second card will be a black card?
PLEASE HELP ME
Let f(x) and g(x) be polynomials as shown below.
f(x)= a0 + a1x + a2x^2 ... + anx^n
g(x)= b0 + b1x + b2x^2 ... + bmx^m
Which of the following is true about f(x) and g(x)?
The answer is A. f(x) and g(x) are closed under addition because when added, the result will be a polynomial.
What is addition?Addition is denoted using the plus sign (+) or a plus symbol. Addition can be used to find the total in a group of numbers, to combine two or more numbers, or to compare two numbers.
When two polynomials f(x) and g(x) are added, the result is also a polynomial. The degree of the resultant polynomial is equal to the highest degree of the two added polynomials.
Thus, when a polynomial is added to another polynomial, the result will always be a polynomial.
This is true because when two polynomials are added, the resulting polynomial will have the same form as the two polynomials that were added.
In other words, the sum of two polynomials will have the same coefficients and powers of x as the two polynomials that were added.
Therefore, f(x) and g(x) are closed under addition because when added, the result will always be a polynomial.
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Mario has 45 red chips, 12 blue chips, and 24 white chips. What is the probability that Mario randomly selects a red chip or a white chip?
Step-by-step explanation:
To find the probability of Mario randomly selecting a red chip or a white chip, we need to first determine the total number of red and white chips he has.
Total number of red and white chips = 45 + 24 = 69
Therefore, the probability of Mario randomly selecting a red chip or a white chip is:
P(red or white) = (number of red chips + number of white chips) / total number of chips
P(red or white) = (45 + 24) / (45 + 12 + 24)
P(red or white) = 69 / 81
P(red or white) = 0.85
So the probability of Mario randomly selecting a red chip or a white chip is 0.85 or 85%.
Answer: 0.8519 ≈ 85%
Step-by-step explanation:
To find the probability, we will divide wanted outcomes by total possible outcomes. See below.
[tex]\displaystyle \frac{\text{wanted outcomes}}{\text{possible outcomes}} =\frac{\text{number of red or white chip}}{\text{total number of chips}} =\frac{45+24}{45+12+24}= \frac{69}{81}[/tex]
= 0.8519 ≈ 85%
The probability that Mario will randomly select a red or white chip is 0.8519 or about 85%.
give branliest
you have to split the equation to get the answer for absolute value.
|x-5|=2
Step-by-step explanation:
When x -5 is a positive
x -5 = 2
x = 7
when x -5 is a negative
x-5 = -2
x = 3
please help me out
x-2/x+3≤0
Answer:
Step-by-step explanation:
The line plot displays the cost of used books in dollars.
A horizontal line starting at 1 with tick marks every one unit up to 9. The line is labeled Cost in Dollars, and the graph is titled Cost of Used Books. There is one dot above 2, 4, 8, and 9.There are two dots above 6 and 7. There are three dots above 3.
Which measure of center is most appropriate to represent the data in the graph, and why?
The mean is the best measure of center because there are no outliers present.
The mean is the best measure of center because there are outliers present.
The median is the best measure of center because there are no outliers present.
The median is the best measure of center because there are outliers present.
Using the median, which is not affected by outliers, would provide a better representation of the typical or central value of the data.
What is median?
Median is a measure of central tendency that represents the middle value in a dataset when the values are arranged in order of magnitude. To find the median, you need to arrange the values in order from smallest to largest and then find the middle value.
Based on the given information, the median is the best measure of center because there are outliers present. The reason for this is because the presence of outliers can greatly affect the mean and make it a less representative measure of central tendency.
In this case, the dots above 6, 7, and 3 may be considered as outliers since they are far from the other data points.
Therefore, using the median, which is not affected by outliers, would provide a better representation of the typical or central value of the data.
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3. What is the solution to 4(y – 3) + 19 = 8(2y + 3) + 7?
A.
B.
를
-
C. -2
D. 2
Answer:
The answer to your problem is, C. -2
Step-by-step explanation:
To solve : 4(y - 3) +19=8(2y + 3) + 7?
Open the bracket:
4y - 12 + 19 = 16y + 24 + 7
Collect like terms
4y - 16y = 24 + 7 + 12 - 19
-12y = 24
Divide both sides by - 12 to isolate y
-12y / - 12 = 24 / - 12
y = -2
Thus the answer to your problem is, C. -2
For first step you do not really need to “ open the bracket “ just solve it.
At the Golf Classic Open, the professional golfer. Gunter Money hit a chip shot from the rough that just skimmed the top of a 90 foot pine tree and went right into the hole, 220 feft away, on the green for an eagle on the 12th fairway.
Use regression to find an equation for the path of the golf ball?
Use matrices to find the equation for the golf balls path?
The assumptions include that the path of the ball can be modeled by a parabolic function, that data on the trajectory of the ball is needed, and that matrices can be used to solve for the constants a, b, and c. Finally, the inverse of the matrix can be computed using matrix algebra.
What is a matrix?A matrix is a rectangular array of letters, numbers, or expressions in mathematics that are organized in rows and columns. In addition to representing and transforming data in statistics, physics, and computer science, matrices are also used to represent and convert linear equations and transformations in linear algebra.
We need to make some assumptions and approximations in order to develop an equation for the flight of the golf ball because the actual path of the ball is influenced by a number of variables, including wind, temperature, humidity, and spin. The idea that a parabolic function may simulate the ball's trajectory is one that is frequently held.
We would need information on the ball's trajectory, such as height and distance at various points along the trip, in order to perform regression. Regression analysis cannot be used to derive an equation for the trajectory of the golf ball in the absence of this data.
To use matrices, we can set up a system of equations based on the parabolic function:
[tex]y = ax^2 + bx + c[/tex]
where x is the distance traveled by the ball, y is the height of the ball, and a, b, and c are constants to be determined.
We can set up three equations based on the following assumptions:
At the starting point (x=0), the height of the ball is zero.
At the point where the ball hit the tree (x = d), the height of the ball is the height of the tree (90 feet).
At the landing point on the green (x = D), the height of the ball is zero.
Using these assumptions, we can set up the following system of equations:
c = 0 (from assumption 1)
[tex]ad^2 + bd + c[/tex] = 90 (from assumption 2)
[tex]aD^2 + bD + c[/tex] = 0 (from assumption 3)
To solve for the constants a, b, and c, we can use matrix algebra to write the system in matrix form:
[tex][0 0 1] [c] [0][/tex]
c[tex][d^2 d 1] * [b][/tex] = [90]
[tex][D^2 D 1][/tex] [a] [0]
Multiplying the matrices, we get:
[0 0 1] [c] [0]
[tex][d^2 d 1][/tex] * [b] = [90]
[tex][D^2 D 1][/tex] [a] [0]
Simplifying, we get:
[c] [0]
[b] = [90] * [tex][d^2 d 1]^-1 * [d^2 d 1][/tex]
[a] [0]
where the inverse of the matrix [tex][d^2 d 1][/tex] can be computed using matrix algebra. Once we have the values of a, b, and c, we can plug them into the equation [tex]y = ax^2 + bx + c[/tex] to get the equation for the path of the golf ball.
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Las calificaciones de Emma al finalizar el semestre son las siguientes: 9, 10, 10, 6, 7, 8, 9, 6, ¿cuál es su promedio?
The base of a rectangular pyramid has side has side 5 ft and 7 ft. the height of the smaller triangular face is 4 ft. Do you have enough information to find the surface area of the pyramid? Explain
A rectangular pyramid is a pyramid with a rectangular base and four triangular faces that meet at a single point at the top, called the apex. It is a three-dimensional solid with five faces, including the base, and is a type of pyramid with a rectangular base.
Do you have enough information to find the surface area of the pyramid?No, we do not have enough information to find the surface area of the rectangular pyramid.
To find the surface area of a rectangular pyramid, we need to know the lengths of all four sides of the base, as well as the slant height and height of each triangular face.
In this case, we only have two sides of the rectangular base (5 ft and 7 ft) and the height of one of the triangular faces (4 ft). We do not have enough information to find the length of the other two sides of the base or the slant height and height of each triangular face.
Therefore, we cannot find the surface area of the rectangular pyramid with the given information.
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cooling towers are used to remove or expel heat from a process. a cooling tower's walls are modeled by where the measurements are in meters. what is the width of the cooling tower at the base of the structure? round your answer to the nearest whole number.
The width of the cooling tower at the base of the structure is 100 meters, rounded to the nearest whole number.
Given that the cooling tower's walls are modeled by where the measurements are in meters and the width of the
cooling tower at the base of the structure is required, we can find the width by using the formula for the area of a
trapezoid. The area of the trapezoid represents the area of the base of the cooling tower.
Area of a trapezoid = 1/2 × (a + b) × h
where a and b are the lengths of the parallel sides of the trapezoid and h is the height or perpendicular distance
between the parallel sides.
In this case, the parallel sides of the trapezoid are not given, but we are given the height of the cooling tower, which is
100 meters. We also know that the area of the base of the cooling tower is 10,000 square meters.
Therefore, we can use the formula for the area of a trapezoid to find the sum of the lengths of the parallel sides of the
trapezoid, which will give us the width of the cooling tower at the base.
Area of a trapezoid = 1/2 × (a + b) × h
10,000 = 1/2 × (a + b) × 100
100 = (a + b)/2
200 = a + b
Width of cooling tower at the base = (a + b)/2
Width of cooling tower at the base = 200/2
Width of cooling tower at the base = 100 meters
Therefore, the width of the cooling tower at the base of the structure is 100 meters, rounded to the nearest whole number.
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Solve by substitution method 2x+7y=11 and x-3y=5
Answer:
Step-by-step explanation:
[tex]x = \frac{68}{13}[/tex]
[tex]y = \frac{1}{13}[/tex]
To solve the system of equations by substitution method, we can use one equation to solve for x or y, and then substitute that expression into the other equation to solve for the other variable.
From the second equation, we have:
x - 3y = 5
Solving for x, we get:
x = 3y + 5
Now we can substitute this expression for x into the first equation and solve for y:
2x + 7y = 11
2(3y + 5) + 7y = 11
6y + 10 + 7y = 11
13y = 1
y = 1/13
Now that we have solved for y, we can substitute this value back into one of the original equations to solve for x:
x - 3y = 5
x = 3y + 5
x = 3(1/13) + 5
x = 5 6/13
Therefore, the solution to the system of equations is:
x = 5 6/13 and y = 1/13.
Find the measure of DE 2x+7 4(x-3)
The measure of DE is 8x. This was found by using the distance formula to calculate the length of the side.
What is measurements ?Measurements are the process of comparing an unknown quantity to a known reference value in order to estimate the size, quantity, distance, weight, or other characteristics of that unknown quantity. Measurements are used in science and engineering to quantify the properties of objects, or to compare objects to each other. Measurements are also used in everyday life to help make decisions and assess the impact of changes.
To find the measure of DE, we must first calculate the length of the side. We can do this by using the distance formula. The distance formula is used to calculate the length of a line between two points in a plane. The formula is given as d = √(x2 - x1)2 + (y2 - y1)2.
For the side DE, we can use the coordinates (2x+7, 4(x-3)). The first point is (2x+7, 4(x-3)) and the second point is (2x+7, 4(x+3)). We can substitute these points into the distance formula to calculate the length of DE.
The formula becomes d = √[(2x+7 - 2x+7)2 + (4(x+3) - 4(x-3))2]
Simplifying, we get d = √[(0)2 + (8x)2]
d = √[64x2]
d = 8x
Therefore, the measure of DE is 8x.
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In the right triangle, find the length of the side not given. Give an exact answer and an approximation to three decimal
K
places
a=15, b=15
the exact value of C is
the approximate value of c is
approximately what percentage of americans consume alcoholic beverages regularly? group of answer choices 50 percent 25 percent 10 percent 75 percent
There are 75 percent of Americans consume alcoholic beverages regularly. so, the correct answer is D).
According to a 2021 survey conducted by the National Institute on Alcohol Abuse and Alcoholism, approximately 75% of adults in the United States reported that they had consumed alcohol in the past year.
However, it's important to note that this does not necessarily mean that they consume alcohol regularly. The percentage of Americans who consume alcoholic beverages regularly may vary depending on how "regularly" is defined and the specific population being studied.
So, the correct option is D).
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rectangle below has an area of 160 inches2. Which of the following statements about the shape
below is not true?
A The base of the figure is 20 inches in length.
B the formula A=b/8 could be used to determine the area
C the formula b=160/8 could be used to determine the length of the base
D The formula 160(b)(8) could be used to determine the length of the base
Answer: The statement that is not true is D.
Explanation:
We know that the area of the rectangle is 160 square inches. Let's assume that the length of the base is b inches. Then, the height of the rectangle would be 160/b inches (since area = base x height).
Now, we can check the given statements:
A. The base of the figure is 20 inches in length.
We do not know the length of the base, so we cannot say for sure whether this statement is true or false.
B. The formula A=b/8 could be used to determine the area.
This statement is false. The correct formula for the area of a rectangle is A = b x h.
C. The formula b=160/8 could be used to determine the length of the base.
This statement is true. We can solve for b as:
b = A/h = 160/(160/b) = 8
So, the length of the base is 8 inches.
D. The formula 160(b)(8) could be used to determine the length of the base.
This statement is false. The given formula does not make sense in the context of the problem, and it does not allow us to determine the length of the base.
Step-by-step explanation:
Balance Nancy's budget by putting what remains each month into a savings account. She can save
The amount that Nancy can save each month and put in the savings account is $10.
What is savings?Savings are funds that are not used right away but are instead set aside for unforeseen expenses or future needs. It is the gap between one's earnings (income) and their outlays (expenditures) (the amount of money spent). Regular income, investment profits, tax refunds, and gifts are just a few of the several ways that people might support their savings. You may save money in a variety of ways, such as by creating a budget and eliminating wasteful spending, opening a savings account, buying stocks or bonds, and making contributions to retirement plans like 401(k)s or IRAs.
The total income earned by Nancy is:
30 + 50 + 25 + 35 = $140
The total expenses are:
40 + 60 + 30 = $130
The amount remaining after expenses is:
Savings = 140 - 130 = $10
Hence, the amount that Nancy can save each month and put in the savings account is $10.
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slope of line graphed on photo
The slope of the line passing through (0,3) and (1,-1) is -4.
What is slope of the line?
The slope of a line is a measure of its steepness or incline. It describes how much the line rises or falls as it moves horizontally.
To find the slope of the line passing through (0,3) and (1,-1), we can use the slope formula:
m = (y2 - y1)/(x2 - x1)
where (x1,y1) and (x2,y2) are the coordinates of the two points.
Plugging in the given coordinates, we get:
m = (-1 - 3)/(1 - 0)
m = -4/1
m = -4
Therefore, the slope of the line passing through (0,3) and (1,-1) is -4.
The slope of a line can be positive, negative, zero, or undefined (when the line is vertical). A positive slope means that the line is increasing as it moves to the right, while a negative slope means that the line is decreasing as it moves to the right. A slope of zero means that the line is horizontal, and an undefined slope means that the line is vertical.
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Complete question is: Slope of the given line passing through (0,3) and (1,-1) is -4.
Here is an equation that is true for all values of x: 5(x + 2) = 5x + 10. Jenny
saw this equation and says she can tell 20(x + 2) + 31 = 4(5x + 10) + 31 is
also true for any value of x. How can she tell? Explain your reasoning.
Answer:
20(x + 2) = 20x + 40 = 4(5x + 10)