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3 years ago

How much sales tax will you pay?

Mathematics

1 answer:

nevsk [136]3 years ago

8 0

Answer:

I don't know, I'm just doing this to get points. lol

Step-by-step explanation:

You might be interested in

Alexis was shopping on the ground floor of the mall when she realized she had left her phone in her car. She walks down 6 floors

expeople1 [14]

Answer:

-6

Step-by-step explanation:

-6 represents alexis position after she walks to her car.

the integer 0 represents the location of the ground floor!

hope this helped! <3

6 0

3 years ago

1. Verizon Wireless would like to estimate the proportion of households that use cell phones for their phone service without a l

Pavel [41]

Answer:

The 95% confidence interval for the true proportion of households which rely strictly on cell phones for their phone serviceis (0.2453, 0.3947).

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 $1 - \frac{\alpha}{2}$ .

A random sample of 150 households was selected and 48 relied strictly on cell phones for their service.

This means that $n = 150, \pi = \frac{48}{150} = 0.32$

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 $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.32 - 1.96\sqrt{\frac{0.32*0.68}{150}} = 0.2453$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.32 + 1.96\sqrt{\frac{0.32*0.68}{150}} = 0.3947$

The 95% confidence interval for the true proportion of households which rely strictly on cell phones for their phone serviceis (0.2453, 0.3947).

5 0

3 years ago

Simplify the expression using the order of operations.

Delvig [45]

2x6 = 12
8x3 = 24
24+12
36

7 0

3 years ago

Read 2 more answers

How do I find what x equals

Jobisdone [24]

Answer:

basically, you get x to one side and the number to another side, then simplify. For example, 3x-2=x+6. The steps are:

2x-2=6, here we brought the x to the other side by subtracting an x from each side. Since the x was positive (adding) we subtract x from each side.

2x=8, we did the same thing but added 2 to each side since -2+2=0, and now it is on the other side.

x=4, 2x means x times 2, so you would divide each side by 2.

In short, put x on one side and number on the other by doing the opposite of what something says, remove multiplication or division by doing the opposite. You must always do it on both sides, or it is not an equation.

4 0

3 years ago

Amanda needs to make a garden plot which has an area less than 18 sq. feet. The length should be 3 feet longer than the width. W

SCORPION-xisa [38]

Answer:

<em>Any width less than 3 feet</em>

Step-by-step explanation:

<u>Inequalities</u>

The garden plot will have an area of less than 18 square feet. If L is the length of the garden plot and W is the width, the area is calculated by:

A = L.W

The first condition can be written as follows:

LW < 18

The length should be 3 feet longer than the width, thus:

L = W + 3

Substituting in the inequality:

(W + 3)W < 18

Operating and rearranging:

$W^2 + 3W - 18 < 0$

Factoring:

(W-3)(W+6)<0

Since W must be positive, the only restriction comes from:

W - 3 < 0

Or, equivalently:

W < 3

Since:

L = W + 3

W = L - 3

This means:

L - 3 < 3

L < 6

The width should be less than 3 feet and therefore the length will be less than 6 feet.

If the measures are whole numbers, the possible dimensions of the garden plot are:

W = 1 ft, L = 4 ft

W = 2 ft, L = 5 ft

Another solution would be (for non-integer numbers):

W = 2.5 ft, L = 5.5 ft

There are infinitely many possible combinations for W and L as real numbers.

6 0

3 years ago