A variable needs to be eliminated to solve the system of equations below. Choose the correct first step. -9x – 4y = 20 x + 4y = 12 Add to eliminate x. Add to eliminate y. Subtract to eliminate y. Subtract to eliminate x. Submit Answer

Simplify 6sin θsec θ. choices a) 6 tan θ b) 6 cos θ c) 6 cot θ d) 6

Which composition of similarity transformations maps polygon abcd to polygon a'b'c'd'? a dilation with a scale factor less than 1 and then a reflection a dilation with a scale factor less than 1 and then a translation a dilation with a scale factor greater than 1 and then a reflection a dilation with a scale factor greater than 1 and then a translation

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points