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allochka39001 [22]

3 years ago

5

Emma opened a surf shop in Beaufort, North Carolina. She modeled her yearly profit, P, in dollars, for x years on the graph belo

w.

1 answer:

V125BC [204]3 years ago

5 0

For the years 0 through 24 the profit is either zero or a positive number, so the shop is not in debt for those years.

Answer: A. [0, 24]

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The age of a father is 3 times the age of his son. 5 years ago, the father was 4

LUCKY_DIMON [66]

Answer:

Step-by-step explanation:

x = father's age

y = son's age

Nowadays:

3x = y

5 years ago:

4(x - 5) = y - 5

4x - 20 = y - 5

4x = y + 15

I hope I've helped you.

3 0

3 years ago

Division of fractions

Verizon [17]

Answer:

The first step to dividing fractions is to find the reciprocal (reverse the numerator and denominator) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. Finally, simplify the fractions if needed.

5 0

2 years ago

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Solve for c; a/b+c=d/c

Eduardwww [97]

To solve for c, you need to get c onto one side of the equation, or make it c=__. So what I would do first is subtract a/b from both sides

a/b + c = d/c

-a/b

a/b - a/b + c = d/c - a/b

c = d/c-a/b

8 0

3 years ago

What is the area of the triangle whose vertical are (-4,0), (-10,0) and (-7,-6)?

olchik [2.2K]

Step-by-step explanation:

from the point -10 to -4 thre is a difference of 6 uints . Base 6

from the x-axis to furthest point,

there is a difference of 6 units. Height 6

8 0

2 years ago

Dora calculated the mean absolute deviation for the data set 35, 16, 23, 42, and 19. Her work is shown below.

Crazy boy [7]

Answer:

The calculation in step 3 is wrong

Step-by-step explanation:

1) The mean of a dataset is given by the sum of the values of the dataset divided by the number of values.

In this problem, the dataset is

35, 16, 23, 42, 19

And the number of data is

N = 5

So the mean is

$\bar x=\frac{35+16+23+42+19}{5}=27$

So, step 1 is correct.

2)

The absolute deviation of a value in the dataset is the absolute value of its difference from the mean value:

$\sigma_i = |x_i-\bar x|$

Since here the mean value is

$\bar x=27$

Then for each of the values in this dataset, we have:

$\sigma_{1}=|35-27|=8\\\sigma_{2}=|16-27|=11\\\sigma_{3}=|23-27|=4\\\sigma_{4}=|42-27|=15\\\sigma_{5}=|19-27|=8$

So calculations in step 2 are also correct.

3)

The mean absolute deviation is given by the sum of the absolute deviations for each data divided by the number of values in the dataset.

Therefore in this problem, it is:

$\bar \sigma = \frac{\sum \sigma_i}{N}=\frac{8+11+4+15+8}{5}=9.2$

While the result reported by Dora is 9.5: therefore, this step is not correct.

5 0

3 years ago

Read 2 more answers