Answer:
-10
Step-by-step explanation:
subtract 4 from both sides
divide by 2
After 1 sec it would be 65 m/s
after 2 sec it would be 55 m/s
after 3 sec it would be 40 m/s
after 4 sec it would be 20 m/s
and so on. The equation for this is
S = 70 - (-5(t)) where s=speed and t=time passed
Set the equations equal to each other
Subtract x from both sides
Divide both sides by -4
x=-1/2
