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poizon [28]
3 years ago
7

a can complete a piece of work in 10 days B can do it in 12 days C can do it in 15 days in how many days will they finish the wo

rk if they work together​
Mathematics
1 answer:
Anna [14]3 years ago
5 0
<h2><em><u>YOUR</u></em><em><u> </u></em><em><u>ANSWER</u></em><em><u> </u></em><em><u>IS</u></em><em><u> </u></em><em><u>IN</u></em><em><u> </u></em><em><u>THE</u></em><em><u> </u></em><em><u>ATTACHMENT</u></em><em><u>. </u></em></h2>

<em><u>hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>helps</u></em><em><u> </u></em><em><u>you</u></em>

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I dont know i need help please
Minchanka [31]

Answer:

C

Step-by-step explanation:

8 0
2 years ago
6 12/17 a rational number
Mkey [24]

Answer:

Yes

Step-by-step explanation:

Rewrite the mixed number into an improper fraction...

6 12/17 becomes 114/17    

The definition of a rational number is any number a/b where b does not equal zero.  114/17 satisfies this requirement, so it is a rational number

4 0
3 years ago
58. 122. 61. None of the choices are correct
In-s [12.5K]

Answer:

C. 61

Step-by-step explanation:

Two sides are equal, so the triangle is an isosceles triangle.

Both base angles are equal.

Angles in a triangle add up to 180 degrees.

58 + x + x = 180

58 + 2x = 180

2x  = 122

x = 61

8 0
3 years ago
6. What is the measure of EGF?*
pishuonlain [190]

Answer:

the answer will be 40.18

Hopefully I am right

All the best !!

6 0
3 years ago
The time for a professor to grade an exam is normally distributed with a mean of 16.3 minutes and a standard deviation of 4.2 mi
dem82 [27]

Answer:

62.17% probability that a randomly selected exam will require more than 15 minutes to grade

Step-by-step explanation:

Problems of normally distributed samples are 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:

\mu = 16.3, \sigma = 4.2

What is the probability that a randomly selected exam will require more than 15 minutes to grade

This is 1 subtracted by the pvalue of Z when X = 15. So

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

Z = \frac{15 - 16.3}{4.2}

Z = -0.31

Z = -0.31 has a pvalue of 0.3783.

1 - 0.3783 = 0.6217

62.17% probability that a randomly selected exam will require more than 15 minutes to grade

8 0
3 years ago
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