I NEED HELP FAST! The function h(t) = −16t2 + 72t + 52 models the flight of a ball that is thrown from the roof of Perry High School, where h(t) is the height of the ball in feet after t seconds.

Part A: What is the maximum height of the ball?

Part B: After how many seconds does the ball reach its maximum height?

may i see the picture? it would a lot, xox

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system