X-intercept: (-5, 0)
Y-intercept: (0, 10)
Answer:4
Step-by-step explanation:
Answer:
I'm pretty sure it's A. Hope this helps!
Answer:
Therefore the ball strikes the ground 5.98 s after kick.
Step-by-step explanation:
Given that , a ball is kicked in the air. The height of the ball can be calculated using the equation
where h is height in feet and t is time in second.
When the ball touches the ground then the height will be zero.
i.e h(t)=0
Therefore
![-16t^2+64t+190=0](https://tex.z-dn.net/?f=-16t%5E2%2B64t%2B190%3D0)
![\Rightarrow -2(8t^2-32t-95)=0](https://tex.z-dn.net/?f=%5CRightarrow%20-2%288t%5E2-32t-95%29%3D0)
Since -2≠0 then ![(8t^2-32t-95)=0](https://tex.z-dn.net/?f=%288t%5E2-32t-95%29%3D0)
[The solution of a quadratic equation ax²+bx+c=0 is
here a=8, b=-32 and c=-95]
Therefore t= 5.98 or -1.98
since time can not be negative So , t=5.98 s
Therefore the ball strikes the ground 5.98 s after kick.
Answer:
-8b + 9 - 5k
Step-by-step explanation:
I am assuming the blue highlighted portion is your answer, and is not a part of the initial question
(-4b + 15 - 7k) - (6 + 4b - 2k)
Combine like terms
-4b - + 4b
Negative + Positive = Negative
-4b - 4b = -8b
15 - 6 = 9
-7k - - 2k
Negative + Negative = Positive
-7k + 2k = -5k
Put them all together:
0b + 9 - 5k
Simplify
-8b + 9 - 5k
I got the same answer as you (just in a different order)