Find the value of x 47 and 22

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

The height of a triangle is 4 in. greater than twice its base. the area of the triangle is no more than 168 in.^2. which inequalitycan be used to find the possible lengths, x, of the base of the triangle?

Which expression is equivalent to 2x^2+7x+4?