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Crazy boy [7]
2 years ago
11

-1/3-(-3/5)= reduce to the simplest form.

Mathematics
2 answers:
Ne4ueva [31]2 years ago
6 0

Answer:

1/15

Step-by-step explanation:

-1/3 -(-3/5)

-1/3 + 3/5

(-1 × 5) / (3 × 5) + (3 × 3) / (5 × 3)

-5 / 15 + 6 / 15 = 1/15

melamori03 [73]2 years ago
6 0

Answer:

1/15 is the answer

Tell me if you need an explanation

I hope you had a good Thanksgiving. (:

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A triangle has one angle measuring 3X degrees a second angle measures 2X +20°
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Explanation :
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Last year there were 120 students in choir. This year, 30% more students took choir. How many students are taking choir this yea
soldi70 [24.7K]

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Step-by-step explanation:

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7 0
3 years ago
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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
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andrew11 [14]

Answer:

b

Step-by-step explanation:

8 0
3 years ago
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