PLEASE HELP ILL MAKE BRAINLIEST Which of the following is a monomial?

A.) 3/x

B.) 5x^2 + 2x + 3

C.) 4x

D.) sqre x-1

What is the area of the trapezoid shown ?

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.