6(6a-4b) what is it i cant figure it out

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x