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Taya2010 [7]
4 years ago
11

Write and solve an equation to find the value of the variable. 5.2, 8.3, 8.5, 7.7, 7.8, y; mean = 7.1

Mathematics
1 answer:
Nataliya [291]4 years ago
5 0
Mean of a set of numbers is the quotient when their sum is divided by the number of items in the set. For the given above, their sum (S) is, 
                        S = 5.2 + 8.3 + 8.5  + 7.7 + 7.8 + y = 37.5 + y

The mean (m) is calculated through the formula, 
                                  m = S / n 
where n is the number of items. In this given there are 6 items including y. 
                                7.1 = (37.5 + y) / 6   ; y = 5.1

Therefore, y is equal to 5.1.
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The cost to rent a moving van is $23 plus as a additional $7 per hour. For $37, what is the maximum amount of time that a moving
lapo4ka [179]

Given:

Fixed cost to rent a moving van = $23

Additional cost = $7 per hour.

To find:

For $37, the maximum amount of time that a moving van can be rented for.

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Divide both sides by 2.

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5 0
3 years ago
3
kaheart [24]

Answer:

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Step-by-step explanation:

y - x = -13

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Find y.

y = -13 + x

Plug y into 2nd equation

-4x + 3y = -51

-4x + 3(-13 + x) = -51

-4x + -39 + 3x = -51

-x = -12

x = 12

y = -13 + 12

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6 0
3 years ago
Martin will earn $20 per hour at a new job. During training, he will earn $15 per hour. What percent of Martin's regular hourly
LenaWriter [7]

Answer:the answer is 75%


Step-by-step explanation:


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3 years ago
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Levart [38]

Answer:

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Step-by-step explanation:

8 0
4 years ago
Which statement is true of x2 + 8x – 6?
hodyreva [135]

Answer:

  The polynomial is prime.

Step-by-step explanation:

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4 0
3 years ago
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