Can u find the value of x and both missing angle measures? it’s just notes i was absent when she explained it.

What is the standard form of -5x^2+2x^4-11+x^3+3x

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?