Answer:
6/8
9/12
12/16
Step-by-step explanation:
1. 45 degree angle. 2. 20* same as the bottom do to the top.
When the firecracker hits the ground, H(t) = 0.0 = -16t^2 + 90t + 160 Using the quadratic formula,t = (-90 +- sqrt(90^2 - 4(-16)(160))) / 2(-16)t = -1.42 ort = 7.04
The negative time is extraneous. Therefore,t = 7.04 s.
Seven Seconds is your answer!
Answer:
the value of x=
2×-12= -24
the value of y is 3y plus 20 which equals to 23
