Can some one me no idea what do to even do.

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Asporting good store is offering 30 percent off of the original price(x) of football cleats. the discount will be reduced by an another $7 before sales tax.