katielloyd
21.12.2019 •
Mathematics
Solve with either substitution or eleminiton
2x – 9y = 32
4x + y = -12
Solved
Show answers
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Ответ:
4x+y=-12
-19y=76
y=-4
4x+(-4)=-12
4x=-8
x=-2
Ответ:
Step-by-step explanation:
It will hit the ground when height is equal to zero.
-16t^2+64t=0
-16t(t-4)=0
t=4 seconds