3 years ago

What is:

Mathematics

1 answer:

bezimeni [28]3 years ago

6 0

1/6 of 54 = 9
1/6 of 9 = 1.5

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Answer:

$\frac{4+8-2}{6-4}*3-1=\frac{12-2}{2}*3-1\\\\=\frac{10}{2}*3-1=5*3-1=15-1=14$

Step-by-step explanation:

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3 years ago

on the last 5 quizzes, marco has earned a total of 21 out of 25 possible points. if he has a perfect score on the next several q

nevsk [136]

Using the mean concept, it is found that we will need 15 more points to bring up his average up to 90%.

The mean of a data-set is the <u>sum of all observations divided by the number of observations</u>.

In this problem:

In the first 5 observations, total of 21 out of 25 points, hence the mean for these observations is $\frac{21}{25} = 0.84$ .
In the next n observations, mean of 1.

Hence, the mean is:

$M = \frac{0.84(5) + n}{5 + n} = \frac{4.2 + n}{5 + n}$

We want the mean to be of 0.9, thus:

$M = 0.9$

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$4.2 + n = 0.9n + 4.5$

$0.1n = 0.3$

$n = \frac{0.3}{0.1}$

$n = 3$

3 more testes are need, each worth 5 points, hence, 15 more points are needed to bring up his average up to 90%.

A similar problem is given at brainly.com/question/25323941

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3 years ago

a worker can complete the assembly of 15 chairs in 6 hours. At the rate,how many can the worker complete in a 40-hour work week?

san4es73 [151]

Answer:

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Step-by-step explanation:

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3 years ago

Slove for 1.2 x 3 = V

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Step-by-step explanation:

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3 years ago

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STALIN [3.7K]

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To inches?

Step-by-step explanation:

75 cm = is about like 30 inches

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3 years ago