Answer:
I will show all the steps to lead to the solution.
1) 10b = 5 (√c + 2) <---- starting equation
2) divide by 5 => 2 b = √c + 2
3) subtract 2 => 2b - 2 = √c
4) raise to the power 2 => (2b - 2)^2 = c, which is the expression given.
Now these are two equivalent forms:
1) extract 2 from the parentheses: c = 4 (b -1)^2
2) expand the parentheses: c = 4b^2 - 8b + 4)
Step-by-step explanation:
Choice D
Answer:
2
Step-by-step explanation:
The cosine of angle X is
By the Pythagorean theorem, we have
Then
Multiplying numerator and denominator by 2, we get 
.
80.25/2.5 = 32.1
Therefore, the fee is $32.10 per hour.
Hope this helps!
