Answer:
the answer is 4-x^2
Step-by-step explanation:
-2x
and 2x cancel out
Answer:
the anser would be the second one i think hope it helps please mark brailiest
Step-by-step explanation:
Answer:
3 seconds
Step-by-step explanation:
when h=7 ft
-16t²+49t+4=7
-16t²+49t-3=0
16t²-49t+3=0
16t^2-48t-t+3=0
16t(t-3)-1(t-3)=0
(t-3)(16t-1)=0
t=3,t=1/16
t=1/16 seconds is the time when it just started.
so reqd. time=3 seconds.
Answer: 390 miles
Step-by-step explanation:
