The edge would be 9.5
The volume would be 857.38
Answer: 
Step-by-step explanation:
Creating identical expressions involves changing quantities in a way that preserves the end values specified in the equation.
For instance, if Lei sold 4 carnations:

In the second equation listed, the expression (8 + 0.25c) was multiplied by 4, then by 0.25, for a total multiplicand of 1.
You can make a third equation through the same method. I'll multiply (8 + 0.25c) by 2, and then multiply that expression by 0.5 to keep the multiplicand unchanged:

If Lei sold 4 carnations:
0.5 * (16 + 2) = 9
This equation represents the same quantities as the other equations.
The answer is 79 because 9/10 divided by 71.1 is 79. And if you want to check, you can multiply 9/10 by 79, which will give you 71.1. I hope this helped :)
If y is the number of hours it takes to pour foundations, and x is the number of construction workers, y=k/x, because it takes less time the more workers there are. So 32=k/4 and k=128 and y=128/x. The constant of variation is 128.
D The graph is an absolute value function with vertex (-2, 0).
Look at the picture.