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FinnZ [79.3K]
3 years ago
6

Solve for r 5(r-10)=-51

Mathematics
2 answers:
masya89 [10]3 years ago
3 0

Answer:

r = -0.2

Step-by-step explanation:

5r-50=-51

5r=-1

r= -0.2

Thats what I got based on PEMDAS...

zzz [600]3 years ago
3 0

Answer:

\boxed {r = -\frac{1}{5}}

Step-by-step explanation:

Solve for the value of r:

5(r - 10) = -51

-Use <u>Distributive Property</u>:

5(r - 10) = -51

5r - 50 = -51

-Add 50 on both sides:

5r - 50 + 50 = -51 +50

5r = -1

-Take 5 and divide it on both sides:

\frac{5r}{5} = \frac{-1}{5}

\boxed {r = -\frac{1}{5}}

Therefore, the value of r is -\frac{1}{5}.

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From a group of 13 women and ​12 men, a researcher wants to randomly select 8 women and 8 men for a study. In how many ways can
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The total number of ways the study can be selected is: 637065

Given,

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Total number of men in a group = 12

Number of women chosen = 8

Number of men chosen = 8

∴ the total number of ways the study group can be selected = 13C₈ and 12C₈.

This in the form of combination factor = nCr

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13C₈ = 13!/(13 ₋ 8)! 8!

        = 13!/5!.8!

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Now multiply both the combinations of men and women

= 1287 × 495

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Hence the total number of ways the study group is selected is 637065

Learn more about "Permutations and Combinations" here-

brainly.com/question/11732255

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