Hello : let h =f(t)
<span>the ball hit the ground if : f(t) =0
solve : </span><span> -16t² + 20t + 6=0
</span><span>Δ = b²-4ac ... a = -16 b= 20 c =6
</span>Δ =(20)²-4(-16)(6) = 784 = 28²
t1 = (-20-28)/-32 = 48/32 =3/2
t2 =(-20+28) /-32 <span>< 0 refused
conclusion : t=3/2</span>
3x=14-5
3x=14-5
3x=9
x=9 ➗ 3
x= 3
the answer is 3
Are you looking for what the equation would be???
Answer:
45 hours
Step-by-step explanation:
if he makes 18 dollars per hour and he has 810 dollars all you have to do is divide 810/18 and you get 45
Answer:
maybe D
Step-by-step explanation:
