Answer: Kelsey had $65 to spend on books. Each book cost $5.50, and there was a $7.50 fee for shipping. She let b equal the number of books she can purchase
Step-by-step explanation:
Answer:

Step-by-step explanation:
step 1
Find the surface area of the cylinder
The surface area of the cylinder is equal to

we have
----> the radius is half the diameter

assume

substitute

<em>Find the cost</em>

step 2
Find the surface area of the square prism
The surface area of the prism is equal to

we have

substitute

<em>Find the cost</em>

step 3
Find the difference of costs

Answer: The last one 15
+15g
Step-by-step explanation:
The last one , is not equivalent because after simplifying the expression, you will get 15g^2 + 45g and the last one doesn't match to it.