Please I really need your help!!
Sat Prep, Find the value of x.

Find the maximum value of p= 4x + 5y subject to the following constraints :

In order for the function to be linear, what must m be and why? m = 22 because the rate of change is 1. m = 20 because the rate of change is 3. m = 22 because the rate of change is -1. m = 20 because the rate of change is -3.

Sections of prefabricated wood are each 5 1/3 feet long. how long are 7 1/2 sections placed end to end?