H(t) =5t^2+10t+15 is height ,h, of diver above the water (in meters),t seconds after the diver leaves the springboard 1)how high above the water is the springboard?

2) when does the diver hit the water ?

When does the diver reach the peak of the dive?

rectangle: 9 1/8 x 4 1/9 = 37 37/72in

parallelogram: b times h= 10.3 x 6.2 = 63.86

trapezoid: a+b/2 times h= 42.5

volume of prism: l times w times h= 36

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

kjgfcvbjkl

step-by-step explanation:

sdfghjkl; vbnm,