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wel
2 years ago
15

Find the value of x . 12.5,−10,−7.5,x ; The mean is 11.5 .

Mathematics
1 answer:
fomenos2 years ago
4 0
There are four values, including the unknown value x. The sum of the four values is the given value of the mean, 11.5, multiplied by four. Let S be the sum of the four values. Then we can write:
S=11.5\times4=46

46=12.5 + (-10)+(-7.5)+x
x = 46 + 5 = 51
The answer is: The value of x is 51.

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5x-27+7x-32+9x-8=180
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For this case we must solve the following equation:

5x-27 + 7x-32 + 9x-8 = 180

We group the variable terms of the left side of the equation, the terms that are adding from one side pass to the other side subtracting and vice versa:

5x + 7x + 9x = 180 + 27 + 32 + 8\\21x = 247\\x = \frac {247} {21}\\x = 11.76

Thus, the value of the variable is 11.76

ANswer:

x = 11.76

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2 years ago
A tanker that ran aground is leaking oil that forms a circular slick about 0.2 foot thick. To estimate the rate​ dV/dt (in cubic
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Answer:

dV/dt = 155.74 ft^3/minute

Step-by-step explanation:

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Differentiating both sides;

dV/dt = 0.2π × 2r dr/dt = 0.4πr.dr/dt

Given;

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8 0
2 years ago
Read 2 more answers
Which statement is true about the parts of this expression? 5/6 + 1/4x - y The constant is 5/6. The only coefficient is 1/4. The
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Answer:


Step-by-step explanation:

1/4 is the coefficient

x and y is the variables

5/6 is the constant but there could be a  equal to zero on the end giving you another constant

Therefor the only true statement is The only coefficient is 1/4.  

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2 years ago
The surface area of a square pyramid is 95 square inches. The side length of the base is 5 inches. What is the value of x?
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2 years ago
Ester's choir wants to learn a new song for the school concert in 7 weeks. The song has 3,016 lines. The choir learns an equal n
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Answer:

the answer you will get is 61.5

Step-by-step explanation:

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3 0
2 years ago
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