3 years ago

Julio says, "If you subtract 18 from my number and multiply the difference by - 3, the result is

Mathematics

1 answer:

ololo11 [35]3 years ago

3 0

Answer:

(X-18)-3=15

3x-54=15

3x=15+54

3x=69

x=23

So jubo's number is 23

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Evaluate 10C4. Type a numerical answer in the space provided. Do not type spaces in your answer.

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10C4 represent the Combinations of 10 objects taken 4 at a time.

The formula for nCr is:

$nCr= \frac{n!}{r!(n-r)!}$

In the given case, n=10 and r=4. Using these values we get:

$10C4= \frac{10!}{4!(10-4)!} \\ \\ 
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This means we can make 210 combinations of 10 objects taken 4 at a time.

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