A perfect square is something times that same thing. Example (x+2)(x+2)
The reason it's called a perfect square is because it can be re-written as a squared function:
Answer:
B. 
Step-by-step explanation:
Simplify the given expression to determine its equivalent expression in the given options.






(x - 1) cancels (x - 1)




Answer:9
Step-by-step explanation:
Square root of 81 is9.
Answer:
17
Step-by-step explanation:
f(x) = x + 8
f(9) = 9 + 8
= 17
We are given with
dimensions of wheelbarrow = 2ft x 3ft x 1.5 ft
dimensions of truck = 11 ft x 8 ft x 6 ft
The volume of the wheelbarrow is 2(3)(1.5) = 9 ft3
The volume of the truck is 11(8)(6) = 528 ft3
70% of this is
528 ft3 (0.7) = 369.6 ft3
Dividing this by the volume of the wheelbarrow
369.6 ft3 / 9 ft3 = 41.07
He would need to use the wheelbarrow 42 times.