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const2013 [10]
3 years ago
15

Write a proportion to find how many points a student needs to score on

Mathematics
1 answer:
blagie [28]3 years ago
7 0

Answer:  2

Step-by-step explanation:

I did it on a test!

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Using graph paper, determine the line described by the given point and slope. Click to show the correct graph below.
Alenkinab [10]

Answer:

Probably the 1st picture.

Step-by-step explanation:

keep in mind, the center is 0.

7 0
2 years ago
It has a time to failure distribution which is normal with a mean of 35,000 vehicle miles and a standard deviation of 7,000 vehi
Triss [41]

Answer:

The designed life should be of 21,840 vehicle miles.

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Mean of 35,000 vehicle miles and a standard deviation of 7,000 vehicle miles.

This means that \mu = 35000, \sigma = 7000

Find its designed life if a .97 reliability is desired.

The designed life should be the 100 - 97 = 3rd percentile(we want only 3% of the vehicles to fail within this time), which is X when Z has a p-value of 0.03, so X when Z = -1.88.

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

-1.88 = \frac{X - 35000}{7000}

X - 35000 = -1.88*7000

X = 21840

The designed life should be of 21,840 vehicle miles.

3 0
2 years ago
Tyrone is the supervisor at a water park. His annual salary is $34540. What is his monthly salary?​
icang [17]

Answer:

the answer I got was 2878.3

8 0
2 years ago
For Each Data Set, Determine the median, the first and third Quartiles, and the interquartile Range.
inysia [295]
Text per day: median= 26 1st quartile= 19 3rd quartile=38 Interquartile=19 Daily attendance: median=357.5 1st quartile=298 3rd quartile=422 Interquartile= 124
4 0
3 years ago
A bakery sells mocha cupcakes and chocolate cupcakes. It sold 340 mocha cupcakes in a day. 15% of the cupcakes sold that day wer
slava [35]

Answer:

400 cupcakes

Step-by-step explanation:

So, 340 is 85%. 15% is chocolate.

340/x = 85/100

34000=85x

x=400

Total = 400 cupcakes.

Hope this helps!

8 0
3 years ago
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