Answer:
3
17
Step-by-step explanation:
3 groups of 17 are the only way to divide 51 evenly.
3 x 17 = 51 + 1 = 52
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Answer:
The cost of a sheet metal per square foot is $30
Step-by-step explanation:
Given
Size of Sheet Metal = 8.2ft squared
Used Sheet Metal = 3.5ft squared
Worth of leftover sheet = $141
Equation: 
Required
Find the cost per square foot of the sheet metal
Solving for x in the above equation will give the cost per square foot of the sheet metal.


Divide both sides by 4.7



Hence, the cost of a sheet metal per square foot is $30
Answer:
This is not a real number, A
Step-by-step explanation:
F(x) = (1/9 x) - 2
y = (1/9 x) - 2
(1/9 x) = y + 2
x = 9(y + 2) = 9y + 18
f^-1(x) = 9x + 18