PLEASE HELP
Given a (T) = 3x + 8 and b(x) = -22 + 7, find the difference of 2a (4) and -6(-5).

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.