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2 years ago

–8x3 – 2x2 – 12x – 3

Mathematics

1 answer:

Alex777 [14]2 years ago

7 0

$- 40x - 3$

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A suit cost $95 Barry has a discount coupon for 10 %off and the city has 4.5%sales tax .what is the final cost of the suit?

torisob [31]

The final price would be 89.35

3 0

3 years ago

HELP PLEASE DON'T UNDERSTAND

lana66690 [7]

For #3 the order on the number line from left to right is -2 1/6, -1.62, -1.26, .21, 3/11, 5/3, 2 2/9, 2.375
For #4
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8 0

3 years ago

You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on con

Assoli18 [71]

Question:

You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on constructing a confidence interval; however, you are not sure how many citizens should be included in the sample. If you want your sample estimate to be within 5 years of the actual mean with a confidence level of 97% , how many citizens should be included in your sample? Assume that the standard deviation of the ages of all the citizens in this community is 18 years.

Answer:

61.03

Step-by-step explanation:

Given:

Standard deviation = 18

Sample estimate = 5

Confidence level = 97%

Required:

Find sample size, n.

First find the Z value. Using zscore table

Z-value at a confidence level of 97% = 2.17

To find the sample size, use the formula below:

$n = (Z * \frac{\sigma}{E})^2$

$n = ( 2.17 * \frac{18}{5})^2$

$n = (2.17 * 3.6)^2$

$n = (7.812)^2$

$n = 61.03$

Sample size = 61.03

4 0

4 years ago

Your friend earns $10.50 per hour. This is 125% of her hourly wage last year. How much did your friend earn per hour last year?

Mrac [35]

I believe it is 8.40

5 0

3 years ago

What is the probability that from a normal 52 card deck, you randomly draw a 5, and then without replacement, you select a Queen

Mamont248 [21]

Answer:

1 / 663

Step-by-step explanation:

First, let's find the total number of ways you can pick 2 cards from the deck. This is 52 * 51 = 2652 because there are 52 cards available for your first pick, and after you pick one, you'll have 51 left for your second pick.

There are 4 5's (one for every suite) and only 1 Queen of Hearts in a deck of cards. Therefore, the total number of successful outcomes will be 4 * 1 = 4.

The probability of picking a 5 and then a Queen of Hearts is 4 / 2652 =

1 / 663. Hope this helps!

6 0

3 years ago