Answer:

Step-by-step explanation:
Given


Required
The cost of units used
First, calculate the number of units used.



Next, multiply the units used by the cost per units,
Since the cost per unit is not given, we assume that it is x.
So, the total cost is:



Answer:
C is what i think would be the perimeters of the squares.
Step-by-step explanation:
Answer:
x=15, y=19
Step-by-step explanation:
All the numbers that can go into 40 and 56 are:
1
2
4
8