What isthe turning point of the parabola equation isY=(x+2)(x-8)
1 answer:
Answer:
(3, - 25 )
Step-by-step explanation:
Given a quadratic in standard form : y = ax² + bx + c : a ≠ 0
The the x- coordinate of the turning point is
x = -
Given
y = (x + 2)(x - 8) ← expand factors using FOIL
= x² - 6x - 16 ← in standard form
with a = 1 and b = - 6, thus
x = - = 3
Substitute x = 3 into the equation for corresponding value of y
y = (3 + 2)(3 - 8) = 5(- 5) = - 25
turning point at (3, - 25 )
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In other words, the sample mean of the times for 71 times of the first round measured in seconds is:
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In other words, the sample standard deviation of the times for 71 times of the first round measured in seconds is:
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