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3 years ago

What is the value of m? 2m-5=-m+7

Mathematics

1 answer:

maxonik [38]3 years ago

8 0

Answer:

4 is your value for m.

Step-by-step explanation:

Note the equal sign, what you do to one side, you do to the other. Isolate the variable, m. Do the opposite of PEMDAS.

First, add 5 & m to both sides:

2m (+ m) - 5 (+ 5) = - m (+ m) + 7 (+ 5)

2m + m = 7 + 5

Simplify. Combine like terms:

3m = 12

Isolate the variable, m. Divide 3 from both sides:

(3m)/3 = (12)/3

m = 12/3

m = 4

m = 4 is your answer.

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denis23 [38]

Answer:

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3 years ago

Responda a expressão 2x+3x+5x:

siniylev [52]

$\tt{}2x + 3x + 5x$

$\tt{}(2 + 3 + 5)x$

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2 years ago

David ran for president of the chess club, and he received 76 votes. there were 80 members in the club. what percentage of the c

TEA [102]

76 out of 80 people for David.

Therefore, 76/80 people for David.

Further simplifying, every 19 out of 20 people voted for David.

What's 19 out of 20?

20 x 5 = 100
19 x 5 = 95

95% of the club members voted for David.

5 0

3 years ago

The mean of the sample is 24.444 squares with a standard deviation of 2.45 squares. Single-ply toilet paper requires 26 squares

Romashka [77]

Answer:

t = -2.69 , p = 0.0078

Step-by-step explanation:

We have the following data:

Sample Mean = x = 24.444

Sample Standard Deviation = s = 2.45

Sample size = n = 18

Josh wants to test that mean number is lesser than 26. So our test value is 26 i.e.

u = 26

Since Josh wants to test that mean would be fewer than 26, so this would be a left tailed test with a less than sign in Alternate Hypothesis. Therefore, the hypothesis would be:

$H_{o}: u\geq 26\\H_{a}: u$

Since, we do not know the value of Population standard deviation, and we have the value of sample standard deviation, we will use One-Sample t-test for the population mean.

The formula to calculate the test-statistic would be:

$t=\frac{x-u}{\frac{s}{\sqrt{n}}}$

Substituting the values in this formula gives us:

$t=\frac{24.444-26}{\frac{2.45}{\sqrt{18}}}\\t=-2.69$

This means, the test statistic would be -2.69

Since, the sample size is 18, the degrees of freedom would be:

Degrees of freedom = df = n - 1 = 17

To find the p-value we need to check the p-value against test statistic of 2.69, with 17 degrees of freedom and One-tailed test. This value comes out to be:

p-value = 0.0078

Therefore, the correct answer would be:

t = -2.69 , p = 0.0078

4 0

3 years ago

Write the number 0.5 in the form a/b using integers

Llana [10]

1/2 because when you type the number 1 and divide it by 2 it shows up as .5

5 0

3 years ago