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3 years ago

PLEASE HELP ME!

Mathematics

1 answer:

-Dominant- [34]3 years ago

6 0

Answer:

a/8 = b/15

Step-by-step explanation:

a/b = 8/15 -- divide both side by 8 and multiple both side by b

a/8 = b/15

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What is 5.27 × 1021 expressed in standard notation?

Strike441 [17]

The standard notation would be 5,380.67. Hope this helps!

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3 years ago

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X+3+5x= x plus three plus five x equal

choli [55]

Answer:

6x+3

Step-by-step explanation:

If you're just combining like terms this is the correct answer

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2 years ago

Find the value of x.

HACTEHA [7]

Answer:

what

Step-by-step explanation:

sure?

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3 years ago

A Gallup Poll used telephone interviews to survey a sample of 1030 U.S. residents over the age of 18 regarding their use of cred

Vlada [557]

Answer:

The 95% margin of error for this estimate is 0.0274 = 2.74 percentage points.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

72% of Americans said that they had at least one credit card

This means that $p = 0.72$

Give the 95% margin of error for this estimate.

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$M = 1.96\sqrt{\frac{0.72*0.28)}{1030}} = 0.0274$

The 95% margin of error for this estimate is 0.0274 = 2.74 percentage points.

7 0

3 years ago

#10 Write the equation of the given circle. center (-2, -2) radius of 6

Roman55 [17]

(x - h)^2 + (y - k)^2 = r^2

h = -2
k = -2
r = 6

(x - (-2))^2 + (y - (-2))^2 = 6^2

(x + 2)^2 + (y + 2)^2 = 6^2

(x + 2)^2 + (y + 2)^2 = 36. your answer

hope this helped, blessings! :)

6 0

3 years ago