I believe it is C,...............
This is Simple, Just Subtract Time taken by Science homework from time taken by Maths homework..

!! Hope It Helps !!
Answer:
you use your biggest brain cell
Step-by-step explanation:
Answer:
10 m
Step-by-step explanation:
Since all of the side lengths of a regular octagon are equal and there are 8 sides on an octagon, the answer would be 80 / 8 = 10 m.
When solving this inequality, you would do the inverse to the other side.
Subtraction is the inverse of addition.
So,
n + 9 (-9) <-3 (-9)
n<-12
When you subtract two negative numbers, you continue to the left of the number line.
I hope this helps!
~cupcake