W=15 subtract 80 from both sides than you divide by -2w
Answer:
<h3>5 seccs</h3>
Step-by-step explanation:
Given the modeled function of the height expressed as;
h(t)=-16t^2+64t+80
The ball hits the ground when h(t) = 0 (when the height is zero)
Substitute into the function and find t;
0 =-16t^2+64t+80
divide through by -16
0 = t²-4t-5
Factorize;
t²-4t-5 = 0
t²-5t+t-5 = 0
t(t-5)+1(t-5) = 0
(t+1)(t-5) = 0
t + 1 = 0 and t-5 = 0
t = -1 and t = 5
Time can't be negative
Hence it will take the ball 5secs before it hits the ground
Answer:
yes x=4 is a solution
Step-by-step explanation:
45x = 180
divide each side by 45
45x/45 = 180/45
x = 4
x=4 is a solution
<span>C).a unique triangle
The other 2 don't make sense.
</span>Hope this helps.
