I need help please (brainllest)

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18