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2 years ago

Find the least common multiple (LCM) of 7, 10, and 20.

Mathematics

2 answers:

Aleonysh [2.5K]2 years ago

7 0

Answer:

140

Step-by-step explanation:

140 is the first multiple that all 3 numbers share.

sveticcg [70]2 years ago

5 0

140

When finding the multiples of 7,10, and 20, the first number you see they all have in common besides 1, is 140

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3 years ago

Tom has a solid, wooden block that is a rectangular prism with non-square bases. He saws the prism parallel to the base. What sh

Katyanochek1 [597]

Answer:

A) Rectangle

Step-by-step explanation:

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3 years ago

100 students participate in sport or music.60 participate in sports and 50 participate in music. How many students participate i

Andrei [34K]

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since there's only 100 students how can 60 participate in sport and 50 participate in music, that must mean there is 110 students right?

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2 years ago

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Anna's toy car traveled 0.7 meters. Hector's toy car traveled 0.72 meters. Whose car traveled farther? Select from the drop-down

alexandr402 [8]

Answer:

When you do adding and subtracting with decimals just line up the decimal points and do the math regularly

0.72

-0.7

_____

0.02 meters further so Hector's car traveled farther

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0.85 swam in total

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3 0

3 years ago

A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 434 gram setting. It is

yan [13]

Answer:

No, there is not sufficient evidence to support the claim that the bags are underfilled

Step-by-step explanation:

A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 434 gram setting.

This means that the null hypothesis is:

$H_{0}: \mu = 434$

It is believed that the machine is underfilling the bags.

This means that the alternate hypothesis is:

$H_{a}: \mu < 434$

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

434 is tested at the null hypothesis:

This means that $\mu = 434$

A 9 bag sample had a mean of 431 grams with a variance of 144.

This means that $X = 431, n = 9, \sigma = \sqrt{144} = 12$

Value of the test-statistic:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{431 - 434}{\frac{12}{\sqrt{9}}}$

$z = -0.75$

P-value of the test:

The pvalue of the test is the pvalue of z = -0.75, which is 0.2266

0.2266 > 0.01, which means that there is not sufficient evidence to support the claim that the bags are underfilled.

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2 years ago