I’m pretty sure you multiply the sides your you find the formulas for the hight and width
Direct variation can be written as a proportion. Therefore, we can write:

Cross multiply to get:
4y=40
Divide by 4 on both sides to get that
y=10.
:)
Answer:
100m
Step-by-step explanation:
just subtract them from each other
500m
- 400m
-----------
100m
let "my number" = x
Multiply x by 5: 5(x)
and add 13: + 13
your expression would look like:
5x + 13
hope this helps
Answer:
2.734
Step-by-step explanation: