It takes 9 seconds to hit the ground.
Setting the equation equal to 0, we have:
0 = 144 + 128t - 16t²
Factoring out the GCF, we have
0 = 16(9 + 8t - t²)
Factoring out -1, we have:
0 = -16(-9 - 8t + t²)
In standard form, this is
-16(t² - 8t - 9) = 0
This is easily factorable; -9(1) = -9 and -9+1 = -8:
-16(t-9)(t+1) = 0
Using the zero product property, we know either t-9=0 or t+1=0; therefore t=9 or t=-1. Since negative time makes no sense, t=9.
The answer is 8lbs because 3/2 is 1.5 and 12/1.5 is 8
Answer:
(10,5)
Step-by-step explanation:
●x+(-3)=7
x=7+3
x=10
●3x+4y=-10
3(-3y)+4y=-10
-6y+4y=-10
-2y=-10
y=5
Answer:
3 months old
Step-by-step explanation:
9 months for birth
and then the other 3 months is the age.
Answer:
7 hours and 15 minutes
Step-by-step explanation:
8:15 to 3:15 is 7 hrs then just add the remaining 15 minutes to get to 3:30.