Write an equation to find the value of the variable, find x, and find the measure of the indicated angle.

Justify the equation.

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52

Multiply and simplify 2x^2 y^3 z^2 · 4xy^4 x^2