What is the value of x2 + 4 for x = 5?

the x2 is x squared.

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

How many $20 bills do you need to have to make $280