Answer:
t = 2 sec
Step-by-step explanation:
h = – 2t²– 6t + 20
When the rocket hits the ground. h = 0 ft.
– 2t²– 6t + 20 = 0 /: (-2)
t² + 3t - 10 = 0
(t + 5)(t - 2)=0
t = - 5, t = 2
Time can be only positive.
Answer:
the answers are d and b
Step-by-step explanation:
d. 19x - 18 = -19x + 18
38x - 18 = 18
38x = 36
x= 36/38= 18/19
b. 19x + 18= -19x + 18
38x + 18 = 18
38x = 0
x =0
The amount of nickels would be $1.75 In quarters you would need 7 of them.
