Simplify each algebraic expression by combing like terms 7x^2-5x+10x-8x^2

The heaviest 16% of all men in weight weigh more than how many pounds ?

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.