Edgar ran e meters per second, and Mathieu ran m meters per second. The boys ran for t seconds. The expression t(m-e) describes how many more meters Mathieu ran than Edgar ran during that time. We can also use the expression tm-te to represent the same quantity. Match each amount in the situation with the expression that represents it.

I try to do it but I don't know if is right...

i think it would be 42cm

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry

just keep asking questions until you have a better understanding.

step-by-step explanation:

12r - 8 - 12

you have to combine like terms. below i have bolded the like terms:

12r - 8 - 12

together it combines to:

12r - 20

hope this !