Solve the system using substitution or elimination and describe your steps. be sure to verify your solution. • x = y - 3 2x + y = 12

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 quadric regression equation that fits these data

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form