Question

Hello? I'm not sure if I just post the question or not… lol so here I go

You are given a pair of equations, one representing a supply curve and the other representing a demand curve, where p is the unit price for x items.
-p+4.5x+8=0
p=sqrt(291-x)
Domain of the supply curve
Domain of the demand curve
b. Determine the market equilibrium. Equilibrium: x =
p=
c. Determine the revenue function. Revenue function R(x)=
d. Determine the revenue at market equilibrium.

I'm stuck on this question =/ Please and thank you =]