2x + 5y = 0 x - 5y = -15
1 answer:
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Answer:
D. -3x + 18
Step-by-step explanation:
3x - 9y = 18
y = 1/3 x - 2 ... x intercept 0 = 1/3x -2 x=6
perpendicular line slope: - 1/(1/3) = -3 and (6,0) 0n the line
equation: (y-0)/(x-6) = -3
y = -3x +18
Answer:
Hence, option: B is correct (11.02 seconds)
Step-by-step explanation:
Spencer hits a tennis ball past his opponent. The height of the tennis ball, in feet, is modeled by the equation h(t) = –0.075t2 + 0.6t + 2.5, where t is the time since the tennis ball was hit, measured in seconds.
Now we are asked:
How long does it take for the ball to reach the ground?
i.e. we have to find the value of t such that height is zero i.e. h(t)=0.
or
i.e. we need to find the roots of the above quadratic equation.
on solving the equation we get two roots as:
t≈ -3.02377 and t≈11.0238
As time can't be negative; hence we will consider the value of t as t≈11.0238.
Hence it takes 11.02 seconds for the ball to reach the ground.
Hence option B is correct (11.02 seconds).