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iogann1982 [59]
3 years ago
11

Which quadratic relation has a y-intercept of 8?

Mathematics
1 answer:
Tpy6a [65]3 years ago
6 0

Answer:

y = 0.5 (x^2 -2x + 16) has a y-intercept of 8.

Step-by-step explanation:

The x-coordinate of every y-intercept is zero.  To determine which of the four quadratics given here has a y-intercept of 8, we need only substitute 0 for x in each; if the result is 8, we've found the desired quadratic.

O y = 0.5(x + 2)(x + 4) becomes y = 0.5(2)(4) = 4 (reject this answer)

O y = 0.5 (x - 2)(x + 8) becomes y = 0.5(-2)(8) = -8 (reject)

O y = 0.5(x2 -2x - 16) becomes y = 0.5(-16) = -8 (reject)

<em>O y = 0.5 (x2 -2x + 16) becomes y = 0.5(16) = 8 This is correct; that '8' represents the y-intercept (0, 8).</em>

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4 years ago
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Answer: 1298 square feet

------------------------------------------------------

Work Shown:

Area of Rectangle on the Left = length*width = c*d = 24*20 = 480
Area of Rectangle in the center = length*width = c*b = 24*10 = 240
Area of Rectangle on the Right = length*width = c*e = 24*17 = 408

Area of top triangle = (base*height)/2 = b*a/2 = 10*17/2 = 170/2 = 85
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3 years ago
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Because,
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This is my first time answering questions so if I got something wrong ask or something hope this helps :)

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