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3 years ago

PLEASE HELP ME ANSWER THIS:(

Mathematics

2 answers:

soldier1979 [14.2K]3 years ago

8 0

Answer:

y = x² - 8x - 20
y = (x - 10)(x + 2),
zero's are (10, 0) and (- 2, 0)

<u>Vertex is:</u>

x = -8/-2 = 4, y = 4² - 8*4 - 20 = -36

<u>Correct choice is</u> A

x² + 1/3x = 4
x² + 2*x*(1/6) + (1/6)² = 4 + 1/36
(x + 1/6)² = 4 1/36

<u>Correct choice is</u> A

(-√-1) = -i
i² = -1 ⇒ i²ⁿ = -1
i²ⁿ⁺¹ = -i

<u>Correct choice</u> A or B

RUDIKE [14]3 years ago

3 0

#1 is A

I hope this helps I don’t know the other ones

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<u>Step-by-step explanation:</u>

Given: cos 330 = $\frac{\sqrt3}{2}$

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