Ann thought of a number, n . She multiplied it by 5 and then added 7. Then she told Jim the result, r
Start with the formula you wrote in part (b). Use it to write another formula that could help Jim find Ann’s number, n as soon as he is given the result, r

The calculated value mean of the sampling distribution for this population is 56

The mean of the sampling distribution for a population with a normal distribution is equal to the population mean.

Therefore, in this case, the mean of the sampling distribution is also 56.

To understand why this is the case, we can consider the central limit theorem, which states that the sampling distribution of the mean of a random sample from a population with any distribution will be approximately normal if the sample size is large enough.

This means that as the sample size increases, the mean of the sampling distribution approaches the population mean.

Therefore, the mean of the sampling distribution for this population is 56.

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Answer:

Step-by-step explanation:

Number 6 is 50,432

Number 7 is 567654

Mean of the data as per the increasing intervals data is 17.80.

The mean in statistics is calculated by multiplying all the values in a set of data by the total number of values for a given set of observations. To put it another way, all that is necessary to determine the mean of a set of data is to sum up all the values and divide the total by the number of values.

Now in the given table,

The midpoints of the intervals are as follows:

0+10/2 = 5

0+20/2 = 10

0+30 /2 = 15

0+40/2 = 20

0+50/2 = 25.

Now total students × interval midpoints are as follows:

5×5=25

10×10=100

15×14=210

20×17=340

25×20=500

Now, total no of students is = 5+10+14+17+20 = 66

So, mean of the data =

(25+100+210+340+500)/66

= 17.80

Therefore, mean of the data is 17.80.

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The resulting number is 12/5

Arithmetic operations is a branch of mathematics, that involves the study of numbers, operation of numbers that are useful in all the other branches of mathematics. It basically comprises operations such as Addition, Subtraction, Multiplication and Division.

Given that we need to, increase the number 15/16 by 3/5 of it, then increase the resulting number by 3/5 of it

So, performing the operations,

15/16+15/16×3/5

= 15/16(1+3/5)

= 15/16(8/5)

= 120/80

= 3/2

Now,

3/2+3/2×3/5

= 3/2(1+3/5)

= 3/2(8/5)

= 24/10

= 12/5

Hence, the resulting number is 12/5

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The standard form of the quadratic functions can be analyzed, by finding the specified coordinates as follows;

1. Vertex; (2, -3)

Axis of symmetry; x = 2

Minimum value; -3

Range; y ≥ -3

2. Vertex; (1, 4)

Axis of symmetry; x = 1

Maximum value; 4

Range; y ≤ 4

3. Vertex; (-3, -1)

Axis of symmetry; x = -3

Maximum value; -1

Range; y ≤ -1

4. Vertex; (-3, 5)

Axis of symmetry; x = -3

Maximum value; 5

Range; y ≤ 5

5. Vertex; (-0.75. -6.125)

Axis of symmetry; x = -0.75

Minimum value; -6.125

Range; y ≥ -6.125

6. Vertex; (2/3, 4/3)

Axis of symmetry; x = 2/3

Maximum value; 4/3

Range; y ≤ 4/3

The standard form of a quadratic function is the form; f(x) = a·x² + b·x + c, a, b, and c are constants and a ≠ 0.

1. The x-value of the vertex point of the quadratic equation; y = ax² + bx + c is; x = -b/(2·a)

Therefore, the x-value of the vertex point of the equation, y = x² - 4·x + 1 is; x = 4/2 = 2

The y-value of the vertex point is; y = 2² - 4×(2) + 1 = -3

The vertex is; (2, -3)

The axis of symmetry if the x-value of the vertex point, therefore;

The axis of symmetry is; x = 2

The minimum value is the y-value of the vertex point, therefore;

The minimum value is; y = -3

The range is the set of the possible y-values

The positive leading coefficient of the function, indicates that the range of the function is the set of values larger than the minimum value.

Therefore, the range is; y ≥ -3

2. The x-value of the vertex point of the equation, y = -x² + 2·x + 3, therefore is; x = -2/(-2) = 1

The y-value at the vertex point is; y = -1² + 2×1 + 3 = 4

The vertex is; (1, 4)

The axis of symmetry is; x = 1

The maximum value is; y = 4

The range is; y ≤ 4

3. The x-value of the vertex is; x = -(-6)/(2 × (-1)) = -3

The y-value at the vertex is; y = -(-3)² × -6 × (-3) - 10 = -1

The vertex is; (-3, -1)

The axis of symmetry is; x = -3

The maximum value is; y = -1

The range is; y ≤ -1

4. The x-value of the vertex is; x = -18/(2×3) = -3

The y-value of the vertex is; y = 3 × (-3)² + 18 × (-3) + 32 = 5

The vertex is; (-3, 5)

The axis of symmetry is; x = -3

The minimum value is; y = 5

The range is; y ≥ 5

5. The x-value of the vertex is; x = -3/(2 × 2) = -3/4

The y-value of the vertex is; y = 2 × (-3/4)² + 3 × (-3/4) - 5 = -6.125

The vertex is; (-3/4, -6.125)

The axis of symmetry is; x = -3/4

The minimum value is; -6.125

The range is; y ≤ -6.125

6. The x-value of the vertex is; -4/(2 × (-3)) = 2/3

Y-value at the vertex is; y = -3 × (2/3)² + 4 × (2/3) = 4/3

The vertex point is; (2/3, 4/3)

The axis of symmetry is; x = 2/3

The maximum value is; 4/3

The range is; y ≤ 4/3

7. The graphs of the quadratic equations can be obtained by finding the coordinates of the vertex, the y-intercept and the x-intercepts and joining the points using a curve symmetrical about the vertex as follows;

The following values are obtained using an online tool.

7. The graph of the equation; y = x² + 2·x - 5, can be obtained using the following points;

The vertex is; (-1, -4)

The y-intercept is; (0, -5)

The x-intercepts are; (-1 + √6, 0), and (-1 - √6, 0)

8. The graph of the equation; y = -x² + 3·x + 1, can be obtained using the following points;

The vertex is; (3/2, 5/4)

The y-intercept is; (0, 1)

The x-intercepts are; (-0.30, 0), and (3.30, 0)

9. The graph of the equation; y = 2·x² + 4·x - 4, can be obtained using the following points;

The vertex is; (-1, -6)

The y-intercept is; (0, -4)

The x-intercepts are; (-1 + √3, 0), and (-1 - √3, 0)

10. The graph of the equation; y = (-1/2)·x² - 3·x + 3, can be obtained using the following points;

The vertex is; (-3, 7.5)

The y-intercept is; (0, 3)

The x-intercepts are; (-3 + √(15), 0), and (-1 - √(15), 0)

Please find attached the graphs of the quadratic equations created with MS Excel

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Answer:

Step-by-step explanation:

Answer:

p=84

Step-by-step explanation:

p=6×14

p=84

answer: p=84

The area of the track is closely 1017.36 square feet.

The rectangle has dimensions of 84 ft by 36 ft,

we then find the area by:

Area of rectangle = length x width = 84 ft x 36 ft = 3,024 square feet

A_semicircle = (1/2)πr^2 = (1/2) x 3.14 x 18^2 = 508.68 square feet

The total area of the two semicircles is:

2 x A_semicircle = 2 x 508.68 = 1017.36 square feet

The area of the rectangle plus the area of the two semicircles is:

A_track_outer = A_rectangle + 2 x A_semicircle

= 3024 + 1017.36

= 4041.36 square feet

The area of the rectangle (the field) is:

A_field = length x width = 84 ft x 36 ft = 3024 square feet

We will subtract the area of the field from the area of the track to find the area of the track itself:

Area of track = A_track_outer - A_field

= 4041.36 - 3024

= 1017.36 square feet

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Answer:

5x+4=19

5x=19-4

5x=15

5x÷5=15÷5

x=3

(a) The relative rate of growth of the bacterium population is 15% per unit time; (b) the initial population of the culture is 90 bacteria; (c) the culture will contain approximately 239 bacteria at time t=5.

(a) The relative rate of growth of the bacterium population can be calculated by taking the derivative of the function n(t) with respect to t and then dividing it by the value of n(t) at that point, which gives:

relative rate of growth = (dn/dt) / n(t)

= (0.15 * 90[tex]e^0.15t[/tex]) / (90[tex]e^0.15t[/tex])

= 0.15

Therefore, the relative rate of growth is 15%.

(b) The initial population of the culture at t=0 is given by plugging in t=0 in the function n(t):

n(0) = 90[tex]e^0.15[/tex]*0

= 90

Therefore, the initial population of the culture is 90.

(c) The number of bacteria in the culture at time t=5 can be found by plugging in t=5 in the function n(t):

n(5) = 90[tex]e^0.15[/tex]*5

= 385.97 (rounded to two decimal places)

Therefore, the culture will contain approximately 385.97 bacteria at time t=5.

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The maximum height reached after the 13th bοunce is 6.14 cm.

The height οf bοunce is the height tο which an οbject rebοunds after cοIIiding with a surface, such as a baII bοuncing οn the grοund οr a diver bοuncing οff a diving bοard. The height οf the bοunce depends οn severaI factοrs, incIuding the initiaI height οf the οbject, the surface it cοIIides with, the eIasticity οf the οbject and the surface, and the angIe οf incidence.

Tο sοIve this prοbIem, we need tο use the fοrmuIa fοr the height οf each bοunce:

[tex]h = (3/4)^{{n}} \times H[/tex]

where h is the height οf the nth bοunce, H is the initiaI height (in this case, 187.00 cm), and n is the number οf bοunces.

We want tο find the maximum height reached after the 13th bοunce, which means we need tο find the height οf the 13th bοunce and then muItipIy it by 3/4 tο get the maximum height.

Using the fοrmuIa abοve, we can find the height οf the 13th bοunce:

[tex]h = (3/4)^{{13}} \times 187.00[/tex]

h ≈ 8.18 cm

Nοw we can find the maximum height:

maximum height = (3/4) × h

maximum height = (3/4) ×8.18

maximum height ≈ 6.14 cm

Therefοre, the maximum height reached after the 13th bοunce is apprοximateIy 6.14 cm.

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no 1) what is the square root of 2? it's about 1.5

no 2) pi is 3.14 blah blahblah so just put somewhere around 3

no 3) do square root of 11, it's about 3.3 so put it a tiny bit after no 2.

all of these will be after the 0, not before because theyre positive

hope this helps x

Answer:

There are 2.2 fans per employee.

Step-by-step explanation:

19812/8900 = 2.2 Rounded.

Helping in the name of Jesus.

Answer:

Step-by-step explanation:

(1\2, 4) = (0.5, 4)

The quadratic equation in the given graph can be written in the vertex-form as:

y = -2(x - 1)² + 4

We can see the graph of a quadratic equation. Remember that a quadratic equation with a vertex (h, k) and a leading coefficient a can be written as:

y = a*(x - h)² + k

in the graph we can see that the vertex is (1, 4), replacing that we will get:

y = a*(x - 1)² + 4

In the graph we also can see that the curve passes through the point (0, 2), replacing thesevalues in the equation we will get:

2 = a*(0 - 1)² + 4

2 = a + 4

-2 = a

Then the quadratic is:

y = -2(x - 1)² + 4

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The 3rd graph is the correct one representing the open sentence.

Inequalities is defined as the mathematical expressions in which both sides are not equal. In inequality, unlike in equations, we compare two values or data. The equal sign in between can be replaced by less than (or less than or equal to), greater than (or greater than or equal to), or not equal to sign.

-5≤n-2≤2

First you need to get n by itself, so add 2 to all 3 terms:

-5 +2 ≤ n-2+2 ≤ 2+2

Simplify:

-3 ≤ n ≤ 4

The less than or equal to signs (≤) mean the dots on the line graph are solid.

And n is between -3 and positive 4, the 3rd graph is the correct one.

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Answer:

Step-by-step explanation:

yes since they are both divisible by their denominators and equal the same thing

Answer:

yes, they are equivalent

Step-by-step explanation:

2/2 = (2/2)x(4/4) = 8/8 = 1

The value of the expression 34 - 9 x 2 is 16.

The order of operations is a set of rules that dictate the order in which mathematical operations should be performed in an expression. These rules help to ensure that mathematical expressions are evaluated correctly and consistently. The order of operations is typically summarized by the acronym PEMDAS, which stands for:

Parentheses: Perform operations inside parentheses first.

Exponents: Evaluate exponents (powers and square roots, etc.) next.

Multiplication and Division: Perform multiplication and division, from left to right.

Addition and Subtraction: Perform addition and subtraction, from left to right.

In the given questions,

In this case, there are no parentheses or exponents, so we move on to multiplication before subtraction.

We perform the multiplication first, following the rule of performing multiplication before addition or subtraction.

9 x 2 = 18

Then, we subtract the result from 34:

34 - 18 = 16

Therefore, the value of the expression 34 - 9 x 2 is 16.

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Answer:

12/12 and 1/12

Step-by-step explanation:

Answer:

To find the number of bags of rice in 2850kg, we need to divide the total weight of rice by the weight of each bag. In this case, each bag weighs 50kg, so:

Number of bags = 2850 kg / 50 kg per bag

Simplifying this expression, we get:

Number of bags = 57 bags

Therefore, there are 57 bags of rice in 2850kg.

To find the value, we need to know the price per bag of rice. If we know this price, we can simply multiply the number of bags by the price per bag to get the total value. Without knowing the price, we cannot determine the value.

Answer:

57

Step-by-step explanation:

Answer:

147

Step-by-step explanation:

A= h^b b=21*14= 147

Answer:

Step-by-step explanation:

This question's answer is 'c'. In the first function here we put the value of x=0, then y =3 but in the second function if we put the value of x=0 then y  =2. so c is the correct answer.

Answer: a) We know that the Revenue equation is a polynomial of order 1, so we can write it in the form:

R(x) = ax + b

where a and b are constants to be determined. We also know that R(1) = 1 and R(5) = 9, so we have two equations:

a(1) + b = 1

a(5) + b = 9

Solving these equations simultaneously, we get:

a = 2, b = -1

Therefore, the Revenue equation is:

R(x) = 2x - 1

Similarly, the Cost equation is a polynomial of order 2, so we can write it in the form:

C(x) = ax^2 + bx + c

where a, b, and c are constants to be determined. We know that C(1) = R(1) = 1 and C(5) = R(5) = 9, so we have two equations:

a(1)^2 + b(1) + c = 1

a(5)^2 + b(5) + c = 9

We also know that C(2) = 0, so we have a third equation:

a(2)^2 + b(2) + c = 0

Solving these equations simultaneously, we get:

a = 1, b = -4, c = 4

Therefore, the Cost equation is:

C(x) = x^2 - 4x + 4

b) The common solutions to the Revenue and Cost equations represent the production level(s) at which the company makes a profit, since the Revenue equation represents the amount of money the company earns and the Cost equation represents the amount of money the company spends. In other words, the common solutions are the values of x for which R(x) - C(x) > 0. At these production levels, the company's revenue is greater than its cost, resulting in a profit. At production levels where R(x) - C(x) < 0, the company is making a loss. At production levels where R(x) - C(x) = 0, the company is breaking even. Therefore, the common solutions to the two equations signify the production levels at which the company makes a profit or breaks even.

Step-by-step explanation:

Reason:

We cannot divide by zero. This means the denominator cannot equal zero. If it was zero, then,

2x+10 = 0

2x = -10

x = -10/2

x = -5

Follow that chain in reverse to see that x = -5 causes the denominator 2x+10 to be zero. This is why we kick -5 out of the domain. Any other x value is valid.

Answer:

The temperature on the eighth day is 80.

Step-by-step explanation:

Let t = temperature on the eighth day.

[tex] \frac{71 + 80 + 69 + 80 + 73 +77+ 70 + t}{8} = 75[/tex]

[tex] \frac{520 + t}{8} = 75[/tex]

[tex]520 + t = 600[/tex]

[tex]t = 80[/tex]

The equivalent fraction for 2/3 is 8/12.

Equivalent fraction of a given fraction is got by multiplying or dividing its numerator and denominator by the same whole number. For example, if we multiply the numerator and denominator of 2/3 by 4 we get. 2/3 = 2×4 / 3×4 = 8/12 which is an equivalent fraction of 2/3.

Answer:

Step-by-step explanation:

To calculate the volume of the room, we need to integrate the difference between the ceiling and floor functions over the region bounded by the circle. We can use double integrals to do this.

First, let's rewrite the equations for the floor and ceiling in terms of x and y:

Floor: z = (x + y) / 5

Ceiling: z = 20 + xy / 100

The volume of the room can be calculated using the following double integral:

V = ∫∫(20 + xy/100 - (x + y)/5) dA

where the limits of integration are x = 0 to x = 50, and y = 0 to y = √(50^2 - x^2).

We can simplify the integrand by combining like terms:

V = ∫∫(400/100 + xy/100 - (20x + 20y)/100) dA

V = ∫∫(4 + xy/100 - 0.2x - 0.2y) dA

Now we can integrate with respect to y first:

V = ∫0^50 ∫0^√(50^2 - x^2) (4 + xy/100 - 0.2x - 0.2y) dy dx

V = ∫0^50 [(4y + xy^2/200 - 0.2xy - 0.1y^2)|y=0^√(50^2 - x^2)] dx

V = ∫0^50 [(4√(50^2 - x^2) + x(50^2 - x^2)/200 - 0.2x√(50^2 - x^2) - 0.1(50^2 - x^2)^2/200)|x=0^50]

Evaluating this integral, we get:

V ≈ 2,233.5 cubic feet

Therefore, the volume of the room is approximately 2,233.5 cubic feet, which is the amount of space that will need to be heated or cooled.

The area of the parallelogram can be found out by using the equation:

A = 4 × 9 = 36m².

By multiplying the base with the altitude, one can determine the area of a parallelogram. A parallelogram's base and height are perpendicular to each another.

Area of parallelogram = b × h square units

Now in the question,

Height of parallelogram, h = 4m

base of parallelogram, b = 9m

Area of parallelogram = b × h

= 4 × 9

=36m²

Therefore, the equation A = 4 × 9 can be used to find the area of the parallelogram.

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Answer:

We can use the formula for average rate of change to find the rate at which the gas is being used:

average rate of change = (change in y) / (change in x)

where y is the number of gallons left in the tank and x is the number of hours driven.

Substituting the given values, we get:

average rate of change = (5 - 14) / (5 - 0)

Simplifying, we get:

average rate of change = -9/5

Therefore, the rate at which the gas is being used is -9/5 gallons per hour, or -1.8 gallons per hour. This means that the gas in the tank is decreasing at a rate of 1.8 gallons per hour.