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marissa [1.9K]
2 years ago
13

Andrew goes to a store an buys an item that costs xx dollars. He has a coupon for 35% off, and then a 8% tax is added to the dis

counted price. Write an expression in terms of xx that represents the total amount that Andrew paid at the register
Mathematics
1 answer:
ANTONII [103]2 years ago
7 0

Answer:

xx(0.65) + xx(0.08)

Step-by-step explanation:

First step is to find the discounted price. Finding 35% less than the original xx is the same as finding 65% of it, so we multiply by 0.65. Once this is completed we need to find 8% more than that. So we add 8% of xx, which is the same as multiplying by 0.08. Hope this helps :)

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A principal believes 50% of her music students reported their practice hours accurately. Based on that assumption, she ran 200 s
Alex17521 [72]

Answer:

C. unlikely

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

A probability is said to be extremely likely if it is 95% or higher, and extremely unlikely if it is 5% or lower. A probabilty higher than 50% and lower than 95% is said to be likely, and higher than 5% and lower than 50% is said to be unlikely.

In this problem, we have that:

\mu = 0.48, \sigma = 0.18

How likely is it that a single survey would return a mean of 30%?

We have to find the pvalue of Z when X = 0.30.

Z = \frac{X - \mu}{\sigma}

Z = \frac{0.30 - 0.48}{0.18}

Z = -1

Z = -1 has a pvalue of 0.1587.

So the correct answer is:

C. unlikely

4 0
3 years ago
PLZ HELP WILL GIVE BRAINLIEST!!!
kondor19780726 [428]

Answer:

The answer is A.

Step-by-step explanation:

It's to much , sorry.

6 0
3 years ago
5 is in lowest terms.<br> O A. False<br> O B. True
Kamila [148]
I would say yes but I could be wrong.
4 0
3 years ago
Megan purchased 12 square yards of flooring for a total of $432. What was the price of this
castortr0y [4]

Answer:

$5184

Step-by-step explanation:

1 per square foot =$432/1

12 square =12×$432/1

$5184

3 0
3 years ago
Read 2 more answers
Simplify 15/48 because i don't know what to divide it by.
DENIUS [597]
5/16 hope this helps
6 0
3 years ago
Read 2 more answers
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