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Oksi-84 [34.3K]
3 years ago
15

Customer 1 purchased 4 sweaters and 3 sweatpants for a total of $118

Mathematics
1 answer:
gulaghasi [49]3 years ago
7 0

Step-by-step explanation:

yuu7777666 is b bvb guy yyuuu

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Dear Math Helper,
valentina_108 [34]

Answer:

n = 98, that is, she scored at the 98th percentile.

Step-by-step explanation:

When the distribution is normal, we use 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.

In this question, we have that:

She scored 38, so X = 38

Test scores are normally distributed with a mean of 25 and a standard deviation of 6.4.

This means that \mu = 25, \sigma = 6.4

Find the percentile:

We have to find the pvalue of Z. So

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

Z = \frac{38 - 25}{6.4}

Z = 2.03

Z = 2.03 has a pvalue of 0.98(rounding to two decimal places).

So n = 98, that is, she scored at the 98th percentile.

5 0
3 years ago
Emily buys a toaster for 10%off if she pays 36 then what was the original price
PtichkaEL [24]
x-0.1x=36

where x is the original price
0.1x is the discount (10% of the original price)
36 is the price paid

x-0.1x=36
0.9x=36
-----   ----
0.9     0.9
x=40

The original price is $40.00

7 0
3 years ago
Read 2 more answers
HELLPPP MEEEEEEE PLEASEEEEE l:(
trasher [3.6K]

Answer: the answer is 6x-5=36

Step-by-step explanation:

dont blame me this is how i was taught

6 0
3 years ago
Read 2 more answers
In a particular triathlon the athletes cover 1/24 of the total distance by
pav-90 [236]

Answer:

15/8

Step-by-step explanation:

Let "d" be the total distance, that is, the distance for swimming (s), running (r) and going by bike (b).

d = s + r + b   [1]

1/24 of the total distance is covered by  swimming.

s = 1/24 d   [2]

1/3 of the distance is covered by running.

r = 1/3 d  [3]

If we replace [2] and [3] in [1], we get

d = 1/24 d + 1/3 d + b

b = d - 1/24 d - 1/3 d

b = 24/24 d - 1/24 d - 8/24 d

b = 15/24 d = 5/8 d

The ratio of  the distance covered by bike to the distance covered by running is:

b/r = (5/8 d)/(1/3 d) = 15/8

5 0
3 years ago
Josefina started to solve for x in the equation
andrey2020 [161]
-2 could not be the answer to |2x - 0.6| because it would have to be positive due to the “| |” symbols.
8 0
3 years ago
Read 2 more answers
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