Can someone explain how to solve identified angles with Exterior Angle Theorem?

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?

Find the zeros of each function. f(x) = 6x^2 - 7x - 20

The triangle shown has a hypotenuse with a length of 13 feet. the measure of angle a is 20 degrees. and the measure of angle b is 70 degrees. which of the following is closest to the length, in feet, of line segment ac? no need to use a calculator to find the trig numbers. each function is listed below. 4.4 5 12.2 35.7