That is correct I think it is
Answer:
-15/4
Step-by-step explanation:
Add 2 1/2 and 4 1/4
Take that fraction and subtract it from 10 1/2
Answer:
Cube
Step-by-step explanation:
It makes a cube
Using the assumed values, the volume of the cone is 
<h3>How to determine the volume of the cone?</h3>
The volume of a cone is calculated using:

The parameters are not given.
So, we use the following assumed values
Radius, r = 5
Height, h =10
Using the assumed values, we have:

Evaluate the product

Hence, using the assumed values, the volume of the cone is 
Read more about volumes at:
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Answer:
3
Step-by-step explanation:
First we must find the total boxes of pens
15 + 9 = 24
Then we can divide the total cost by the total number of boxes of pens
$72 / 24 boxes = 3