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djyliett [7]
3 years ago
11

Which equation is y = 9x2 + 9x – 1 rewritten in vertex form?

Mathematics
1 answer:
Jlenok [28]3 years ago
6 0
<u>Vertex for X</u>
-\frac{9}{2(9)} = -\frac{2}{18} = -\frac{1}{9}

<u>Vertex for Y</u>
y = 9x^{2} + 9x - 1 \\y = 9(-\frac{1}{9})^{2} + 9(-\frac{1}{9}) - 1 \\y = 9(\frac{1}{81}) - 1 - 1 \\y = \frac{1}{9} - 1 - 1 \\y = -\frac{8}{9} - 1 \\y = -1\frac{8}{9}

<u>Vertex</u>
(h, k) = (⁻¹/₉, -1⁸/₉)
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ehidna [41]

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3 years ago
1. If 4.75x = 12.35, what is the value of x? 2. What is 3x +2+ 4x - 1 after combining like terms?
eimsori [14]

Answer:

1. x = 2.6

2. 7x + 1

Step-by-step explanation:

1.

Given:

4.75x = 12.35

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4.75x = 12.35

Divide both sides by the coefficient of x, that is 4.75

4.75x / 4.75 = 12.35 / 4.75

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2.

Given:

3x + 2 + 4x - 1

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6 0
3 years ago
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kvasek [131]
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Hope this helps!
4 0
3 years ago
a family biys airline tickets online. each ticket costs $167. the family buys travel insurance with each ticket that costs $19 p
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4 0
3 years ago
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