Do y'all like nonbinary pan ppl?

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

The graph below shows the height of a projectile t seconds after it is launched. if acceleration due to gravity is -16 ft/s2, which equation models the height of the projectile correctly?

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so