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2 years ago

In Exercises 7–10, graph the function, and label its vertex and y-intercept.

Mathematics

1 answer:

yaroslaw [1]2 years ago

5 0

Answer:

#7: Vertex is (2,-6)

y-intercept is (0,6)

#8: Vertex is (-2,-29)

y-intercept is (0,-9)

#9: Vertex is (-1,1)

y-intercept is (0,-5)

#10: Vertex is (2,20)

y-intercept is (0,-8)

Step-by-step explanation:

Graphs are in the picture below

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A random sample of 8 recent college graduates found that starting salaries for architects in New York City had a mean of $42,653

ycow [4]

Answer:

C. (36337.32, 48968.68)

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96*\frac{9114}{\sqrt{8}} = 6315.68$

The lower end of the interval is the sample mean subtracted by M. So it is 42653 - 6315.68 = 36337.32.

The upper end of the interval is the sample mean added to M. So it is 42653 + 6315.68 = 48968.68.

So the correct answer is:

C. (36337.32, 48968.68)

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3 years ago

What is the mass after 63 hours?

ikadub [295]

Answer:

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Step-by-step explanation:

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3 years ago

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weqwewe [10]

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Step by step explanation:

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2 years ago

Solve for x.<br> 2x + 4<br> 4x - 88<br> x = [?]

baherus [9]

Solve for x.
2x + 4= 8
4x - 88 = -352
x = [?]

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3 years ago

Evaluate the polynomial when x = 3 and y = - 8<br>x2 + y2 + xy<br>

Ivahew [28]

<h3>Answer: 49</h3>

Work Shown:

Replace x with 3, replace y with -8. Use order of operations PEMDAS to simplify.

x^2 + y^2 + x*y

3^2 + (-8)^2 + 3*(-8)

9 + 64 - 24

73 - 24

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3 years ago

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