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DanielleElmas [232]
3 years ago
15

Complete the square to write ײ-4x-9 in the form (x+a)² +b(x+________ ) ^2+________​

Mathematics
1 answer:
MariettaO [177]3 years ago
5 0

Answer:

A: (2,5)

B: (-4,-16)

C: (-2.5,-8.25)

Step-by-step explanation:

A. y = x²- 4x + 9

y = x² - 2(x)(2) + 2² - 2² + 9

y = (x - 2)² - 4 + 9

y = (x - 2)² + 5

Vertex: (2,5)

b. f(x) = x² + 8x

f(x) = x² + 2(x)(4) + 4² - 4²

f(x) = (x + 4)² - 16

Vertex: (-4,-16)

c. y = x² + 5x - 2

y = x² + 2(x)(2.5) + 2.5² - 2.5² - 2

y = (x + 2.5)² - 6.25 - 2

y = (x + 2.5)² - 8.25

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Can i get the right answers please
UkoKoshka [18]

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And for the second question, m = -1.75 and y-intercept = 4, so your equation for the second one should be, y = -1.75x + 4.

Step-by-step explanation: For the 1st one, subtract 3x to get -2y = -3x - 10, then divide by -2 to get y = 1.5x + 5.

For the 2nd one, subtract 7x to get 4y = -7x + 16, then divide by 4 to get y = -1.75x + 4.

Hope this helps you! :)

4 0
4 years ago
Between 6 a.m. and 10 a.m. the temperature rose by 5°F. Between 10 a.m. and 2 p.m. the temperature rose by 6°F. Between 2 p.m. a
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So the total increase is 15C

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10 AM - 2 PM ---> 6 F = -14.44 C

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