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2 years ago

Need help, quickly! make r the subject of the formula p=10(q-3r)/r

Mathematics

1 answer:

damaskus [11]2 years ago

3 0

Answer:

Step-by-step explanation:

p=10(q-3r)/r

Cross multiply

pr = 10(q-3r)

pr = 10q - 30r

Pr + 30r = 10q

r(p + 30) = 10q

r = 10q/(p + 30)

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Consider a total of 1,000 people. If it was said that within 1 deviation (of the mean) of all people like MATH 123, how many of

Lesechka [4]

Answer:

680 students

Step-by-step explanation:

The 68 - 95 - 99.7 rule (empirical rule) states that 68% of the population lies within one standard deviation of the mean, 95% of the population lies within two standard deviations and 95% of the population lies within three standard deviations.

Hence since it was said that within 1 deviation (of the mean) of all people like MATH 123, therefore the number of people that like MATH 123 is:

number of people that like MATH 123 = 68% of the population

number of people that like MATH 123 = 0.68 * 1000

number of people that like MATH 123 = 680 students

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2 years ago

What is the length of PR?

GuDViN [60]

Answer:

you have to provide a picture or something as well

Step-by-step explanation:

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2 years ago

Miss Berk has 8 pairs of pajama pants and 3 pairs of slippers. Three pairs of the pajama pants are Harry Potter themed and one p

shusha [124]

The probability that both items will be Harry Potter themed is 1/8.

<u>Step-by-step explanation:</u>

Total Number of pajama pants n(P) =8

Total number of slippers n(S)= 3

Number of Harry Potter themed Pajama pants n(H.P)=3

Number of Harry Potter themed slippers n(H.S)=1

We have to determine the probability of selecting pants and slippers that are both Harry Potter themed.

If two events A and B are independent, then the probability of A and B is given by

P(A and B)=P(A)*P(B)

Here the events selecting Harry potter themed pants and selecting harry Potter themed slippers are independent.

$P(Harry\ Potter\ pants)=\frac{n(H.P)}{n(P)}$

$=\frac{3}{8}$

$P(Harry\ Potter\ slippers)=\frac{n(H.S)}{n(S)} \\ =1/3$

$P(Harry\ Potter\ pants\ and\ Harry\ Potter\ slippers)=P(Harry Potter pants)\times P(Harry potter slippers)$

$=\frac{3}{8}\times \frac{1}{3} =\frac{1}{8}$

Hence probability of selecting Harry potter themed pants and Harry potter themed slippers is 1/8

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2 years ago

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Brainliest Answer! .....................................................

gayaneshka [121]

I think -16 that's what I think I hope it helps

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2 years ago

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How to solve (x-10)(x + 10) in word form

Nezavi [6.7K]

You will distribute, you will do x times both x and postive Ten in the second set of parenthesis, and then you will do negative Ten times x and also positive Ten and then you combine like terms when you got both end products

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2 years ago