C = 25 + 7h...c = 81
81 = 25 + 7h
81 - 25 = 7h
56 = 7h
56/7 = h
8 = h......so at 8 hrs, it will cost $ 81
Answer:
8.26
Step-by-step explanation:
Answer:
The answer is 14
Step-by-step explanation:
Answer:
7. D:61
8. A:57
9. A: 47
Step-by-step explanation:
Quesiton 7:
To find perimeter we add all the sides together.
x+2x+2x+5=145
Combine all the x's.
5x+5=145
To isolate the constants, subtract 5 from both sides.
5x=140
Now divide both sides by 5 to isolate the x.
x=28
The questions asks for the length of AC, so to find that we need to insert our new x.
AC= 2(28)+5
56+5=61
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