No, the given statement about the lab experiment is not reasonable.
If Max places 1.98 grams of powdered substance into each glass plate and he needs to place the substance into 3 glass plates, then the total amount of the powdered substance he needs is 1.98 x 3 = 5.94 grams. This is greater than the amount Max estimates to be in the container (4.5 grams).
Therefore, it is not reasonable to assume that there are only 4.5 grams of the powdered substance in the container when Max needs to use more than that amount for his experiment.
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Complete Question:
In chemistry lab, there are 9.52 grams of powdered substance in a container. Max needs to place substance into each of 3 glass plates. The amount of powdered substance he places into each glass plate is 1.98 grams. Max estimates that there are 4.5 grams of the powdered substance in the container. Is the statement reasonable?
question 1(multiple choice worth 3 points) (05.05 lc) according to the chart, from 1986-1996, unintentional drug overdose deaths per 100,000 population began to rise. the numbers for each year are, roughly, 2, 1, 2, 2, 1, 2, 2, 3, 3, 3, 3. what is the mean of these statistics? 24 2.18 24.18 2
The mean of the unintentional drug overdose deaths per 100,000 population from 1986-1996 is 2.18. (option 2).
To find the mean of a set of numbers, we add up all the numbers in the set and then divide by the total number of items in the set. In this case, we have the following numbers: 2, 1, 2, 2, 1, 2, 2, 3, 3, 3, and we want to find the mean.
To do so, we first add up all the numbers:
2 + 1 + 2 + 2 + 1 + 2 + 2 + 3 + 3 + 3 = 21
Then we divide by the total number of items in the set, which is 10:
21 / 10 = 2.1
Therefore, the mean of the unintentional drug overdose deaths per 100,000 population from 1986-1996 is 2.18.
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The ordered pairs (−4, 7) and (2, −2) are points on a graph of a linear equation. Which other points are also on the same line?
Select ALL that apply.
(−2, −6)
(−2, −5)
(4, −6)
(4, −5)
(0, −5)
(0, 1)
We can find the equation of the line passing through the given two points (-4, 7) and (2, -2) using the slope-intercept form of a linear equation:
slope (m) = (change in y) / (change in x) = [tex](-2 - 7) / (2 - (-4)) = -9/6 = -3/2[/tex]
Using point-slope form with the first given point (-4, 7), we get:
[tex]y - 7 = (-3/2)(x - (-4))\\y - 7 = (-3/2)x - 6\\y = (-3/2)x + 1[/tex]
Now we can plug in the x-coordinates of the other points given and check if they satisfy the equation.
[tex](−2, −6):\\y = (-3/2)x + 1\\-6 = (-3/2)(-2) + 1\\-6 = 3 + 1\\-6 ≠ 4 (not on the line)[/tex]
[tex](−2, −5):\\y = (-3/2)x + 1\\-5 = (-3/2)(-2) + 1\\-5 = 3 + 1\\-5 ≠ 4 (not on the line)(4, −6):\\y = (-3/2)x + 1\\-6 = (-3/2)(4) + 1\\-6 = -6 + 1\\-6 ≠ -5 (not on the line)(4, −5):\\y = (-3/2)x + 1\\-5 = (-3/2)(4) + 1\\-5 = -6 + 1\\-5 = -5 (on the line)[/tex]
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PLEASE HURRY!! WILL MARK BRAINLIEST!
The quadratic regression graphed on the coordinate grid What does the graph of the regression model show?
represents the height of a road surface x meters from
the center of the road.
•The height of the surface decreases from the center
Road Surface Height
out to the sides of the road.
• The height of the surface increases, then decreases,
from the center out to the sides of the road.
•The height of the surface increases from the center
out to the sides of the road.
• The height of the surface remains the same the entire
distance across the road.
From the figure answer is option B which is The height of the surface increases, then decreases, from the center out to the sides of the road.
What is quadratic regression?Quadratic regression is a statistical method used to model the relationship between a dependent variable and an independent variable using a quadratic function. It is a type of polynomial regression, where the regression equation is a polynomial of degree two.
A center can refer to a point or a location that is the middle or central part of something. For example: In team sports, the center is a position that is located in the middle of the playing area or the team formation, and is often responsible for initiating or directing the team's plays.
In the given question ,
Let y be height of the surface and x be length of the road we know that the quadratic regression graphed represent a vertical parabola open downward
The function increase in the interval [-5,0 ] to [0,0.30]
The function decrease in the interval [0,0.30] to [5,0]
Therefore
The height of the surface increases, then decreases, from the center out to the sides of the road. If the height of the road surface is modeled by a quadratic function, it could have this U-shape, with the highest point (the vertex of the parabola) representing the center of the road, and the height decreasing as you move away from the center to the sides of the road.
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what would happen if 300 people were sampled instead of 200, and the confidence level remained the same?
If 300 people were sampled instead of 200, and the confidence level remained the same, it would produce a more accurate result.
Sampling means selecting the group that you will actually collect data from in your research. For example, if you are researching the opinions of students in your university, you could survey a sample of 100 students. In statistics, sampling allows you to test a hypothesis about the characteristics of a population.
This is because a larger sample size allows for a better representation of the population, providing a more accurate result. Additionally, with a larger sample size, the confidence interval of the sample would be narrower, indicating a higher level of confidence in the accuracy of the result.
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Determine the Surface Area of the following composite figure. Round to the nearest tenth.
i got two wrong out of 4 what am i missing??
A water tank is being drained for cleaning. The volume of water in the tank is given by V (t) = 15(40 − t)2 liters, where t is
the number of minutes after the draining began. (Remember to include UNITS in your answers, when appropriate. )
1) a) (4 points) How much water was in the tank when draining began?
VALUE :
b) (4 points) How much water was in the tank 10 minutes after the draining began?
VALUE :
c) (6 points) What was the average rate of change of the volume of water during the first 10 minutes?
VALUE :
d) (6 points) What was the rate of change of the volume of water 10 minutes after the draining began?
VALUE :
e) (8 points) Is the rate at which the volume is changing increasing or decreasing during the draining? EXPLAIN
a) There were 24,000 liters of water in the tank when draining began.
b) There were 9,000 liters of water in the tank 10 minutes after draining began.
c) the average rate of change of the volume of water during the first 10 minutes was -1,500 liters/minute.
d) The rate of change of the volume of water 10 minutes after draining began was -900 liters/minute.
e) The rate of water draining from the tank is slowing down as time goes on.
a) The volume of water in the tank when draining began can be found by setting t = 0 in the equation [tex]V(t) = 15(40-t)^2[/tex]:
[tex]V(0) = 15(40-0)^2 = 24,000[/tex] liters.
Therefore, there were 24,000 liters of water in the tank when draining began.
b) The volume of water in the tank 10 minutes after draining began can be found by setting t = 10 in the equation [tex]V(t) = 15(40-t)^2[/tex]:
[tex]V(10) = 15(40-10)^2 = 9,000[/tex] liters.
Therefore, there were 9,000 liters of water in the tank 10 minutes after draining began.
c) The average rate of change of the volume of water during the first 10 minutes can be found using the formula:
average rate of change = [tex]\frac{(V_{10} - V_0)}{10}[/tex]
Where [tex]V_{10}[/tex] and [tex]V_0[/tex] are the volumes of water in the tank 10 minutes and 0 minutes after draining began, respectively.
Substituting the values we found in parts (a) and (b), we get:
average rate of change [tex]= \frac{(9,000 - 24,000)}{10} = -1,500[/tex] liters/minute.
Therefore, the average rate of change of the volume of water during the first 10 minutes was -1,500 liters/minute.
d) The rate of change of the volume of water 10 minutes after draining began can be found by taking the derivative of V(t) with respect to t and evaluating it at t = 10:
[tex]V'(t) = -30(40-t)[/tex]
[tex]V'(10) = -30(40-10) = -900[/tex] liters/minute.
Therefore, the rate of change of the volume of water 10 minutes after draining began was -900 liters/minute.
e) To determine whether the rate at which the volume is changing is increasing or decreasing during the draining, we need to look at the sign of the second derivative of V(t) with respect to t. The second derivative is:
[tex]V''(t) = -30[/tex]
Since V''(t) is negative for all values of t, we conclude that the rate at which the volume is changing is decreasing during the draining. In other words, the rate of water draining from the tank is slowing down as time goes on.
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1. What is the diameter of the circle above?
2.
What is the radius of the circle above?
Answer:
diameter = 34 radius = 17
Step-by-step explanation:
Look at the line in the middle of the circle that is the diameter, diameter is a straight line passing from side to side through the center of a circle.
radius is the distance from the center of the circle to any point on its circumference.
10 ft
20 ft
15 ft
Find the area.
A = [?] ft²
Round to the nearest
hundredth.
The total area of the composite figure is 114.25 square feet.
How to find the area of the shape?The area of a circle of diameter D is:
A = 3.14*(D/2)²
And the area of a triangle of base B and height H is:
A = B*H/2
We can decompose the figure into two simpler ones, a triangle of base of 10ft and height of 15 ft, whose area is:
A = 10ft*15ft/2 = 75ft²
And half of a circle of diameter of 10ft, whose area is:
A = 0.5*3.14*(10ft/2)² = 39.25 ft²
Then the total area of the figure is:
area = 75ft² + 39.25 ft² = 114.25 ft²
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It is advertised that the average braking distance for a small car traveling at 70 miles per hour equals 120 feet. A transportation researcher wants to determine if the statement made in the advertisement is false. She randomly test drives 38 small cars at 70 miles per hour and records the braking distance. The sample average braking distance is computed as 112 feet. Assume that the population standard deviation is 25 feet. (You may find it useful to reference the appropriate table: z table or t table)
a. State the null and the alternative hypotheses for the test. H0: μ = 120; HA: μ ≠ 120 H0: μ ≥ 120; HA: μ < 120 H0: μ ≤ 120; HA: μ > 120
b. Calculate the value of the test statistic and the p-value. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.)
Find the p-value. 0.05 p-value < 0.10 p-value 0.10 p-value < 0.01 0.01 p-value < 0.025 0.025 p-value < 0.05
c. Use α = 0.01 to determine if the average breaking distance differs from 120 feet.
With a p-value of less than 0.025, we have sufficient evidence to reject the null hypothesis and conclude that the average breaking distance is different from 120 feet, at the 0.01 significance level.
The p-value is a statistical measure that helps us determine the probability of obtaining a result as extreme as the one we observed, assuming that the null hypothesis is true.
In this case, the null hypothesis is that the average breaking distance is 120 feet. The alternative hypothesis is that the average breaking distance is different from 120 feet.
If the p-value is less than the level of significance (0.01 in this case), we can reject the null hypothesis in favor of the alternative hypothesis.
A p-value of less than 0.025 indicates that the probability of obtaining a result as extreme as the one we observed (or more extreme), assuming that the null hypothesis is true, is less than 0.025.
This is a relatively small probability, which provides strong evidence against the null hypothesis. Therefore, we can conclude that the average breaking distance is different from 120 feet.
It is important to note that rejecting the null hypothesis does not necessarily mean that the alternative hypothesis is true.
It simply means that the evidence suggests that the null hypothesis is unlikely to be true. Further research and analysis may be needed to confirm the alternative hypothesis.
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Sasha had 30 minutes to do a three-problem quiz. She spent 8 3/4
minutes on questions A and 5 1/2
minutes on question B. How much time did she have left for question C?
what is x−10=4 pls help me
Answer:
Step-by-step explanation: 14 = x
Answer:
The answer to your question would be 14
Step-by-step explanation:
Simple equation
14 - 10 = 4
I hope this helps and have a wonderful day!
how can you use a fuormula to find the sum of the measures of the interior angles of a regular polygon?
The formula to find the sum of the measures of the interior angles of a regular polygon is: S = (n - 2) * 180 where S is the sum of the interior angles, and n is the number of sides of the polygon.
This formula can be derived using the fact that the sum of the interior angles of any polygon is equal to (n - 2) * 180 degrees, where n is the number of sides.
For a regular polygon, all interior angles are equal, so we can divide the sum of the interior angles by the number of sides to find the measure of each angle. Let's call this measure x. Then we have:
S = nx
Solving for x, we get:
x = S/n
Substituting S = (n - 2) * 180, we get:
x = ((n - 2) * 180)/n
This formula gives us the measure of each interior angle of a regular polygon in terms of its number of sides. To find the sum of the measures of the interior angles, we can simply multiply the measure of each angle by the number of sides and then sum them up. Alternatively, we can use the formula S = (n - 2) * 180 directly to find the sum of the interior angles without finding the measure of each angle first.
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7 2/9 - 5 5/7 = ?
rlly stuck on this math assignment currently
Answer:
95/63 or 1 32/63
Step-by-step explanation:
turn the fraction into a mixed number/improper fraction
65/9-40/7
find a common denominator which in this case is 63
so, the first fraction you will multiply the numerator and denominator by 7 to get
455/63
then the second fraction multiply the numerator and the denominator by 9
360/63
then you would subtract the two numerators KEEP THE DENOMINATOR THE SAME
455/63-360/63=95/63
how many ways can you select a committee of size 3 from a group of 15 people, where one person will be president, one will be vice president, and one will be treasurer?
There are 13,225 different ways to select a committee of size 3 from a group of 15 people, where one person will be president, one will be vice president, and one will be treasurer.
To calculate this, we can use a combination formula. The formula for combinations is nCr = n! / (r! * (n - r)!), where n is the size of the group and r is the number of people in the committee.
In this case, n = 15 and r = 3.
Using this formula, we can calculate that there are 15! / (3! * (15 - 3)!) = 13,225 different ways to select a committee of size 3 from a group of 15 people, where one person will be president, one will be vice president, and one will be treasurer.
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Tristan was out at a restaurant for dinner when the bill came. His dinner came to $22. He wanted to leave a 16% tip. How much do was his meal plus the tip, before tax, in dollars and cents
Answer: 25 dollars and 52 cents
Step-by-step explanation:
Bill = $22
Tip = 16/100 X 22 = $3.52
Total = 22 + 3.52 = $25.52
Answer:
$25.52
Step-by-step explanation:
16% × 22= $3.52
3.52 + 22= $25.52
Winston is baking a pie. The diameter of the pie is 12 inches. What is the area of the pie? Use 3. 14 for pi and round your answer to the nearest tenth
If the diameter of the pie is 12 inches, then the area of pie is 113.04 in² and 113 in² after rounding to the nearest tenth.
The formula for the area of a circle is: A = π × r²
where A is the area, pi is a mathematical constant approximately equal to 3.14, and r is the radius of the circle.
In this case, we are given the diameter of the pie, which is 12 inches. To find the radius, we need to divide the diameter by 2:
r = 12 / 2
= 6 inches
Now we can use the formula for the area of a circle to find the area of the pie:
A = π × r²
A = 3.14 × 6²
A = 113.04 square inches
Rounding to the nearest tenth gives:
A ≈ 113.0 square inches
Therefore, the area of the pie is approximately 113.0 square inches.
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A sphere has a radius 2. 7 centimeters what is its surface area to the nearest sqaure centimeters
The surface area of the sphere with a radius of 2.7 centimeters is approximately 91.68 square centimeters.
To calculate the surface area of a sphere, we use the formula:
A = 4πr²
where A is the surface area and r is the radius.
Plugging in the value of the radius (2.7 cm), we get:
A = 4π(2.7 cm)² = 4π(7.29 cm²) ≈ 91.68 cm²
Rounding to the nearest square centimeter, we get the final answer of approximately 91.68 square centimeters.
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A student solved the equation extraneous? Explain. 5/x-4 = x/x-4 and got 4 and 5 as solutions. Which, if either, of these is extraneous? Explain.
Therefore , the solution of the given problem of equation comes out to be x = 5 is a correct answer to the problem.
What is equation?Complex algorithms frequently employ variable words to demonstrate coherence between two opposing assertions. Equations are academic expressions that are used to demonstrate the equality of different academic figures. In this instance, normalization results in a + 7 rather than a separate algorithm who divides 12 onto two separate components and is able to evaluate data obtained from x + 7.
Here,
We can begin by making the provided equation simpler:
=> 5/(x - 4) = x/(x - 4)
=> 5 = x
Consequently, x = 5 is the answer to the problem.
The result of adding x = 4 to the initial equation is:
=> 5/(4 - 4) = 4/(4 - 4)
That amounts to:
=> 5/0 = 4/0
However, since division by zero is undefinable, the answer x = 4 is superfluous and does not satisfy the equation.
The result of the initial equation with x = 5 is:
=> 5/(5 - 4) = 5/(5 - 4)
That amounts to:
=> 5/1 = 5/1
As a result, x = 5 is a correct answer to the problem.
In conclusion, only one of the solutions -x = 5 is correct, and the other
-x = 4 is unnecessary because it results in a divide by zero.
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Triangle WXY, with a vertex X at (3, 0), is rotated clockwise 270° about the origin.
Which of the following rotations is equivalent 270° clockwise rotation about the origin?
clockwise 270°
counterclockwise 90°
counterclockwise 360°
clockwise 90°
Answer: A rotation of 270° clockwise is equivalent to a rotation of 90° counterclockwise, because a full rotation is 360° and 270° clockwise is the same as 90° counterclockwise in terms of direction.
Therefore, the answer is: counterclockwise 90°.
Step-by-step explanation:
show that there are arbitrarily long strings of consecutive integers each divisible by a perfect square greater than 1.
To show that there are arbitrarily long strings of consecutive integers each divisible by a perfect square greater than 1,
Solution:
follow these steps:
1. Choose an arbitrary positive integer, n.
2. Define a string of consecutive integers, starting with the product of the first n+1 positive perfect squares:
S = (2^2 * 3^2 * ... * (n+1)^2).
3. The next n consecutive integers will be S+1, S+2, ..., S+n.
4. Each of these consecutive integers, S+i (where 1 <= i <= n), is divisible by a perfect square greater than 1.
Here's why:
- S is divisible by all perfect squares from 2^2 to (n+1)^2, which are greater than 1.
- S+1 is divisible by 2^2, as S = (2^2 * 3^2 * ... * (n+1)^2) is an even number and (S+1) - 1 = 2^2 * K (where K is some integer).
- S+2 is divisible by 3^2, as S = (2^2 * 3^2 * ... * (n+1)^2) is divisible by 3^2 and (S+2) - 2 = 3^2 * K (where K is some integer).
- Continuing this pattern, S+i is divisible by (i+1)^2, for all 1 <= i <= n.
Thus, we have demonstrated that there are arbitrarily long strings of consecutive integers each divisible by a perfect square greater than 1.
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If f(x) =3x+2 what is f(5)?
In the function f(x) = 3x + 2, f(5) = 17
What is a function?A function is a mathematical equation which shows the relationship between two variables.
Since we have the function f(x) = 3x + 2 and we want to find f(5), we proceed as follows.
To find f(5) in f(x) = 3x + 2, we note that f(5) is the value of f(x) when x = 5. So, we substitute x = 5 into the equation.
So, f(x) = 3x + 2
Substituting x = 5 into the equation, we have
f(5) = 3(5) + 2
= 15 + 2
= 17
So, f(5) = 17
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suppose that a pair of dice is tossed. one die has 7 sides, the other has 5 sides. what is the expected value of the sum of the two dice?
Answer:
4 and 3
Step-by-step explanation:
1/7(1+2+3+4+.....+7)
1/7(28)
4
1/5(1+2+3+4+....+5)
1/5(15)
3
The expected value of the sum of two dice with 7 and 5 sides respectively is 11.
To calculate the expected value of the sum of two dice, we can use the formula for expected value, which is equal to the sum of all possible outcomes multiplied by their corresponding probabilities.
In this case, the possible outcomes are 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, with their corresponding probabilities being 1/35, 2/35, 3/35, 4/35, 5/35, 6/35, 5/35, 4/35, 3/35, 2/35, and 1/35 respectively.
So, the expected value of the sum of the two dice is 2*(1/35) + 3*(2/35) + 4*(3/35) + 5*(4/35) + 6*(5/35) + 7*(6/35) + 8*(5/35) + 9*(4/35) + 10*(3/35) + 11*(2/35) + 12*(1/35) = 11.
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What is 5 1/2 x 5 = ?
Answer:27.5
Step-by-step explanation:
i did this with a calculator, but the answer is
27.5
SOLVE WITH EXPLANATION GIVING BRAINLIEST IF YOU SOLVE IT CORRECTLY WITH EXPLANATION IF YOU DONT YOU GET REPORTED :/
Answer:
6.
[tex]2x - 1 = x + 3[/tex]
[tex]x = 4[/tex]
[tex] y = 4 + 3 = 7[/tex]
So the solution is (4, 7).
7. Substituting 4x into the second equation:
[tex]4x + x = 5[/tex]
[tex]5x = 5[/tex]
[tex]x = 1[/tex]
[tex]y = 4(1) = 4[/tex]
So the solution is (1, 4).
Write the equation of this line in slope intercept form.
An equation of this line in slope intercept form is y = -1/6(x) - 5.
How to determine an equation of this line?In Mathematics and Geometry, the slope-intercept form of the equation of a straight line is represented by this mathematical expression;
y = mx + c
Where:
m represent the gradient, slope, or rate of change.x and y represent the data points.c represent the vertical intercept.First of all, we would determine the slope of this line;
Slope (m) = (y₂ - y₁)/(x₂ - x₁)
Slope (m) = (-5 - 0)/(0 - (-30)
Slope (m) = -5/30
Slope (m) = -1/6
At data point (0, -5), a linear equation in slope-intercept form for this line can be calculated as follows:
y = mx + c
y = -1/6(x) + (-5)
y = -1/6(x) - 5
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if you were going to give a speech on the average number of a grades freshmen, sophomores, juniors, and seniors got in spring 2016 at your college, which graph would be best?
Answer:
the juniors, this is because they are the juniors, which means they are the smaller ones here and the ones who need a speech of inspiration and motivation
mike and alain play a game in which each player is equally likely to win. the first player to win three games becomes the champion, and no further games are played. if mike has won the first game, what is the probability that mike becomes the champion?
The probability that Mike becomes the champion given that he has won the first game is 7/12.
To find the probability that Alain wins the championship given that Mike won the first game, we can repeat the same reasoning as before, but with Alain as the starting player.
P(Mike wins championship | Mike won first game) = 1 - P(Alain wins championship | Mike won first game)
This leads to:
P(Alain wins championship | Alain won first game) = 5/8
Therefore, we can conclude that:
P(Mike wins championship | Mike won first game) = 1 - P(Alain wins championship | Mike won first game) = 1 - 5/8 = 3/8 + 1/8 = 4/8 = 1/2
Thus, The probability that Mike becomes the champion given that he has won the first game is 7/12.
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Huan has $100 to spend on video games. If each video game is $40 and he pays $5 in tax, how much money does Huan have left over?
Answer: $15
Step-by-step explanation:
If he spends $80 on two games because if he was to buy three games he would be over his $100. Plus tax is $85.
A line passes through the points
Answer:
5x+2y = -24
Step-by-step explanation:
We have the point (-4,-2) and a slope of -5/2.
Using the point-slope form of a line:
y-y1 = m(x-x1) where m is the slope and (x1,y1) is a point on the line.
y- -2 = -5/2(x- -4)
y+2 = -5/2 (x+4)
Multiply each side by 2.
2(y+2) = -5(x+4)
2y+4 = -5x-20
Add 5x to each side.
5x+2y +4 = -20
Subtract 4 from each side.
5x+2y = -24
a crime reporter was told that on average, 3000 burglaries per month occurred in his city. the reporter examined past data, which were used to computed a 95% confidence interval for the number of burgalries per month. the confidence interval was from 2176 to 2784. at the 5% level of significance, do these data tend to support the alternative hypothesis, $h 1 \ne 3000$? calculate z test score
We need to calculate the z-test score. It is a statistical test for inference that tests the null hypothesis that the mean of a sample from a normal population equals a specified value, and it is a test of statistical significance. Z-score: Z = (x - μ) / (σ / √n)μ = 3000, x = (2176 + 2784) / 2 = 2480, σ is the standard error of the mean, and n is the number of data points.
Z = (2480 - 3000) / (3000 / √n). The standard error of the mean (SEM) is calculated as follows: SEM = σ / √nσ = (2784 - 2176) / (2 × 1.96) = 303.64. Therefore, SEM = σ / √n=303.64 / √n(303.64 / √n) = (3000 - 2176) / 1.96n = 141.56n = 142Z = (2480 - 3000) / (303.64 / √142)Z = -12.95.
Since Z is less than -1.96, the test is significant at the 5% level of significance. Therefore, we can refuse the null hypothesis, and the alternative hypothesis is accepted. Therefore, the data support the alternate hypothesis that the number of burglaries per month is not equal to 3000.
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