Please help. I really need an explanation on how to solve and graph the first equation.

If eh = hg and hg=16, find the diameter of k

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?

For which rational expression is -2 an excluded value of x