3 years ago

Find the vertex of -3/4x^2+9x-18

Mathematics

1 answer:

Nady [450]3 years ago

4 0

Answer:

this might help you to do

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What is 5^3 x 5^11 im so lost

Ne4ueva [31]

Answer:

5^(14)

Step-by-step explanation:

5^3 x 5^11

We know that a^b * a^c = a^(b+c)

5^3 x 5^11 = 5^(3+11) = 5^(14)

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3 years ago

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Monica [59]

They Y intercept is 1

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2 years ago

Please help :0

Zinaida [17]

Mult. f(x) = x^4 by 2 will stretch the graph vertically by a factor of 2.
Thus, eliminate (a) and (b).

Mult. x by (1/4) will stretch the graph horiz. by a factor of 4. Thus, (c) is the correct answer.

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3 years ago

Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and

sergij07 [2.7K]

Answer:

a) sample size is 40

Step-by-step explanation:

(a)

$\sigma=4$ minutes

Margin of error, E is 75 seconds E=75/60= 1.25 minutes.

The level of significance $\alpha= 0.05$ for 95% level of significance

For 95% confidence interval $z_{\frac{\alpha}{2}}=1.96$ from standard deviation table

Sample size required, n

$n=\left (\frac{z_{\frac{\alpha}{2}}\cdot \sigma}{E} \right )^{2}=\left (\frac{1.96\cdot4}{75/60} \right )^{2}=39.337984$

Rounding off, n=40

Sample size =40

Keywords:

95% confidence, sample size, Wall Street Journal

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4 years ago

Which is a factor of x2 – 9x + 14? x – 9 x – 2 x + 5 x + 7

bija089 [108]

$x^2-9x + 14 = \boxed{\bf{(x-2)(x-7)}}$

Your answer is x - 2.

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4 years ago

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