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Mashcka [7]
3 years ago
6

Which of the following math statements contains variables? check all that apply

Mathematics
2 answers:
ollegr [7]3 years ago
6 0

Answer:

Only C and D are the correct answers

Step-by-step explanation:

vlada-n [284]3 years ago
5 0
C and D both have variables because u don’t know what the x stands for
( I hope this helped)
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A manufacturer of tires wants to advertise a mileage interval that ex-cludes no more than 10% of the mileage on tires he sells.
Sergio039 [100]

Answer:

This mileage interval is from 30120 miles and higher.

Step-by-step explanation:

Problems of normally distributed samples can be 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:

All he knows is that, for a large number of tires tested, the mean mileage was 25,000 miles, and the standard deviation was 4000 miles. This means that \mu = 25000, \sigma = 4000.

A manufacturer of tires wants to advertise a mileage interval that ex-cludes no more than 10% of the mileage on tires he sells. What interval wouldyou suggest?

The lower end of this interval is X when Z has a pvalue of 0.90.  That is Z = 1.28.

So

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

1.28 = \frac{X - 25000}{4000}

X - 25000 = 4000*1.28

X = 30120

This mileage interval is from 30120 miles and higher.

7 0
2 years ago
Two urns each contain green balls and blue balls. Urn I contains 4 green balls and 6 blue balls, and Urn II contains 6 green bal
Morgarella [4.7K]
Urn 1 = 4 green balls and 6 blue balls, a total of 10 balls
Urn 2 = 6 green balls and 2 blue balls, a total of 8 balls.

Probability of blue balls:
Urn 1 : P = 6/10 
Urn 2 : P = 2/8 

Probability that both balls are blue:
6/10 * 2/8 = 6*2 / 10*8 = 12/80 = 6/40 = 3/20 

Answer is B. 3/20
3 0
3 years ago
Mason answers a question correctly in a trivia game and now has 0 points. The question was worth
zhannawk [14.2K]

Answer:

Mason recieved 15 points for answering the question correctly so that means that he had -15 points before. The points would be at -15 and 0.

8 0
3 years ago
Read 2 more answers
What’s the distance between the points (-7,-4) and (-5,-4)?
Radda [10]

Answer:

2 units

Step-by-step explanation:

Distance

= \sqrt{(-4 - (-4))^2 + (-7 - (-5))^2}

= \sqrt{0^2 + (-2)^2}

= \sqrt{(-2)^2}

= 2

3 0
3 years ago
Answer this please thanks
Troyanec [42]

Answer:

5x I believe

Step-by-step explanation:

it rises by 5 each time

7 0
2 years ago
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