Which lines are perpendicular to the line y -1 = 1/3(x+2)

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.

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6