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Slav-nsk [51]
2 years ago
7

kevin and joe each manage a shop that sells CDs. Kevin’s shop is in the high street and Joes is in the rentail park.

Mathematics
1 answer:
Bumek [7]2 years ago
8 0

Answer:

Number of CDs sold each day Frequency

0 – 10 10

11 – 20 34

21 – 30 24

31 – 40 13

41 – 50 7

51 – 60 12

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At a local grocery store, apples cost $0.50 each and bananas cost $0.30 each. The expression 0.50x + 0.30y can be used to find t
JulsSmile [24]

(1) x represents the number of apples bought, y represents the number of bananas.

(2) each term represents the total costs of a given fruit, so 0.50x is the total cost of apples and 0.30y is total cost of bananas.

(3) The coefficients are unit prices: coefficient 0.50 is the price of 1 apple, 0.30 is the price of 1 banana.

3 0
2 years ago
An English professor assigns letter grades on a test according to the following scheme. A: Top 14% of scores B: Scores below the
NeX [460]

Answer:

Grades between 62 and 64 result in a D grade.

Step-by-step explanation:

Problems of normally distributed samples are 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.

In this problem, we have that:

\mu = 71.9, \sigma = 7.8

Find the numerical limits for a D grade.

D: Scores below the top 84% and above the bottom 10%

So below the 100-84 = 16th percentile and above the 10th percentile.

16th percentile:

This is the value of X when Z has a pvalue of 0.16. So X when Z = -0.995.

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

-0.995 = \frac{X - 71.9}{7.8}

X - 71.9 = -0.995*7.8

X = 64

10th percentile:

This is the value of X when Z has a pvalue of 0.1. So X when Z = -1.28.

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

-1.28 = \frac{X - 71.9}{7.8}

X - 71.9 = -1.28*7.8

X = 62

Grades between 62 and 64 result in a D grade.

6 0
3 years ago
Alina has just received 3 video games for her birthday to add to her existing 12 video games. A week later she went to the thrif
amm1812
She should have a total of 35 games by now.
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2 years ago
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Talia finished 75% of her homework what fraction of the homework did she finish
notsponge [240]
She completed 3/4 of her homework

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3 years ago
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Which is equivalent to log<br> 2 18 = x-1<br> 18^2 = x-1<br> 2^18 =x-1<br> 18^х-1=2<br> 2^x-1= 18
uysha [10]

Answer:

it the second one

Step-by-step explanation:

b/c 18times it self 2in x-1 is just talking it a way bone

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