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stellarik [79]
3 years ago
6

What is the slope of the line that passes through the points (0, -2) and (9,-5)?

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
8 0

Answer:

-1/3

Step-by-step explanation:

y2 - y1 / x2 - x1

-5 - (-2) / 9 - 0

-3 / 9

-1/3

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For a sample of n = 30 scores, a score that is 6 points above the mean has a z-score of z = 1.50. What is the sample standard de
sleet_krkn [62]

Answer:

4

Step-by-step explanation:

The z-score is calculated by the following formula

z=(x-μ)/σ

where

μ=Population mean

σ=Population standard deviation

If the z-score for a specific sample mean is discussed then z-score is computed as

z=xbar-μ/σxbar.

where

μ=Population mean

σxbar=Sample standard deviation

As the population mean and mean of sampling distribution of mean are equal so, μ is used in above equation.

Now, the z-score is given

1.5=xbar-μ/σxbar

σxbar=xbar-μ/1.5.

Also we know that z-score corresponds to a score that is 6 points above mean which means that xbar-μ=6.

σxbar=6/1.5

σxbar=4.

Thus, the required sample standard deviation is 4.

6 0
3 years ago
What is the interest on $3,500 borrowed for two years at 2.5% interest?
Dima020 [189]

Answer:

turn the percentage into a decmial and then multiply the money

6 0
3 years ago
Barak spent $20 at the arcade. this represents 10%of the money earned by working at thepizza parlor last week.
Karolina [17]
20=10%
times 10
200=100%

he earned $200 at the parlor
4 0
3 years ago
marie made a model (shown below) of the square pyramid she plans to build when she grows up. Find the surface area of the model.
Vladimir [108]

Answer:

55

Step-by-step explanation:

8 0
3 years ago
4y and 5xy are like terms or are unlike terms
Norma-Jean [14]

Answer:

Unlike terms

Step-by-step explanation:

If it was 4y and 5y it would be like. Adding the x though makes them unlike terms, you cannot combine them

4 0
3 years ago
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