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Svet_ta [14]
3 years ago
10

Find the slope and y-intercept of the graph of the equation. y= 2x + 7

Mathematics
1 answer:
faust18 [17]3 years ago
5 0
Slope 2
y- intercept -7
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What does 9(3j-6) equal?
Bezzdna [24]
9(3j-6) = 27j - 54

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3 years ago
An aptitude test has a mean score of 80 and a standard deviation of 5. The population of scores is normally distributed. What pr
konstantin123 [22]

Answer:

2.28% of tests has scores over 90.

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 = 80, \sigma = 5

What proportion of tests has scores over 90?

This proportion is 1 subtracted by the pvalue of Z when X = 90. So

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

Z = \frac{90 - 80}{5}

Z = 2

Z = 2 has a pvalue of 0.9772.

So 1-0.9772 = 0.0228 = 2.28% of tests has scores over 90.

8 0
3 years ago
If you want to buy an item in a store that costs $25 an is on sale for 10% off
kumpel [21]

Answer:

2.50$ off or 22.50$

Step-by-step explanation:

8 0
3 years ago
If 7x+10=44, what is the value of 7x-50?
Daniel [21]

Answer:

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Step-by-step explanation:

So let’s solve for 7x. So 7x=34. So 7x-50 is 34-50 or -16

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What's 1/6 divided by 3
erma4kov [3.2K]

Answer:

1/18

Step-by-step explanation:

1/6 * 1/3

1 *1 = 1

6 * 3 = 18

1/18

5 0
3 years ago
Read 2 more answers
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