The m∠a is 45 degrees. find the m∠b. a) 45 degrees b) 50 degrees c) 90 degrees d) 125 degrees

An arrow is shot vertically upward at a rate of 180ft/s. use the projectile formula h=−16t2+v0t to determine at what time(s), in seconds, the arrow is at a height of 420ft. round your answer(s) to the nearest tenth of a second.

What is the value of  y  in the solution to the system of equations? x  +  y  =  12x  –  3y  =  –30a. –8b. –3c. 3d. 8

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14