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eimsori [14]
3 years ago
10

Step problems please

Mathematics
2 answers:
olganol [36]3 years ago
8 0

7. $14

8. 5.8 hours

9. 60

10. 24 books

notka56 [123]3 years ago
7 0

Answer:

Step-by-step explanation:

7. Let the price of book be x

:- 8x + 17 = 129

8x = 129 - 17

8x = 112

x = 112/8

x = $14

Each book cost $14

8. Let the number of hours be x

9x + 15 = 87

9x = 87 - 15

9x = 72

x = 72/9

x = 8hrs

He paid for 8hours

9. Let the numbers be x, x +2, x +4,

So. x + x + 2 + x + 4 = 168

3x + 6 = 168

3x = 168 - 6

3x = 162

x = 162/3

x = 54

The smallest number is 54

10. Let the number of books be x

So, x/2 + 6 = 18

x/2 = 18 - 6

x/2 = 12

x = 12 ×2

x = 24

So she has 24 book's before

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Which of the following expressions is equivalent to the expression 2(7x+3)
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First you got to multiply 2x7=14x then multiply again 2x3=6 so the answer to the equation will be 2(7x+3)=(14x+6)
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Complete the solution set for this Inequality Use one of the symbols and one of the numbers from the choice below
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Step-by-step explanation:

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What is the slope of the line that passes through points (6, 7) and (4, 2)?
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The slope is 2.5!

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Hope this helps!

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I need help with this ?
LuckyWell [14K]

Answer:

132 cm cubed

Step-by-step explanation:

so if \pi = 3

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6 0
2 years ago
Read 2 more answers
In 2000, the median household income was $41,990. In 2010, it was $49,445. (Source: www.census.gov.)
pochemuha

The average rate of change in the median household income over this time period is $745.5

<h3>What is the average rate of change in the median household income over this time period?</h3>

The given parameters are:

2000, the median household income was $41,990.

2010, it was $49,445.

The average rate of change in the median household income over this time period is calculated as:

Average rate of change = (Difference in Income)/(Difference in years)

So, we have:

Average rate of change = (41990 - 49445)/(2000-2010)

Evaluate

Average rate of change = 745.5

Hence, the average rate of change in the median household income over this time period is $745.5

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