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Annette [7]
3 years ago
13

Write an equation in slope-intercept form for the line with slope 3/4 and y-intercept -1.​

Mathematics
1 answer:
Stels [109]3 years ago
4 0

Answer:

y= \frac{3}{4}\\x-1

Step-by-step explanation:

The slope intercept form is in y=mx+b. Therefore you plug in the following:

- slope = m

- y-intercept = b

Since the problem gives both of these informations you just have to plug it in.

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In a sample of 1000 cases, the mean of a certain test is 14 and the standard deviation is 2.5. Assume the distribution to be nor
Maslowich

Answer:

The top 20% of the students will score at least 2.1 points above the mean.

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.

The mean of a certain test is 14 and the standard deviation is 2.5.

This means that \mu = 14, \sigma = 2.5

The top 20% of the students will score how many points above the mean

Their score is the 100 - 20 = 80th percentile, which is X when Z has a pvalue of 0.8. So X when Z = 0.84.

Their score is:

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

0.84 = \frac{X - 14}{2.5}

X - 14 = 0.84*2.5

X = 16.1

16.1 - 14 = 2.1

The top 20% of the students will score at least 2.1 points above the mean.

7 0
2 years ago
Use inverse operations to solve each equation. Explain each step and identify the property used to reach each step.
maks197457 [2]
Hello,


The inverse operation's are easy.

is would be h/3-8=19


Hope this helps
5 0
3 years ago
Read 2 more answers
The maximum number of marks attainable at a mathematics competition is 60. Kate obtains 40 marks, Priya obtains 46 marks, and No
Anna71 [15]

Answer: See explanation

Step-by-step explanation:

Total marks = 60

Kate = 40 marks = 40/60 × 100 = 66.7%

Kate gets a bronze medal.

Priya = 46 marks = 46/60 × 100 = 76.7%

Priya gets a silver medal

Nora = 49 marks = 49/60 × 100 = 81.7%

Nora gets a good medal.

4 0
2 years ago
A rectangle has a perimeter of 6 feet.<br>Choose all the possible dimensions of the rectangle.​
Reika [66]
Two sides would=2 which would have 2 sides had up to 4, and the other two sides would= 1 which would have those two added up to 2, 4+2=6
6 0
3 years ago
I don’t understand this, please help
damaskus [11]

Hello !

1.     15 + 37 = 52

2 .    22+ 49 = 71

3 .     33 + 26 = 59

4 .      34 + 18 = 52

I found these answers by adding the squares together .

I figured out question 4 by adding the amount of feet the tree grew.

5 0
3 years ago
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