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-BARSIC- [3]
3 years ago
7

Arie ran an equal number of miles each day for 12 days. He ran 60 miles in total.

Mathematics
2 answers:
trasher [3.6K]3 years ago
8 0

Answer: he ran 5 days

Step-by-step explanation: if he ran an equal amount and he ran 60 miles over 12 days the 60 divided by 12 is 5. Hope it helps!!

Nezavi [6.7K]3 years ago
7 0

Answer:

5 miles/day

Step-by-step explanation:

This is a division problem.

(60 miles)/(12 days) = 5 miles/day

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Which of the following is equal C(10,3)?<br><br> a. C(3,10)<br><br> b. C(10,7)<br><br> c. P(10,3)
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Answer:

Option: b is correct.

b. C(10,7)

Step-by-step explanation:

The formula for C(n,k) is evaluated as:

C(n,k)=\dfrac{n!}{k!\times (n-k)!}

Also The formula for P(n,k) is evaluated as:

C(n,k)=\dfrac{n!}{(n-k)!}

C(10,3)=\dfrac{10!}{3!\times (10-3)!}\\\\C(10,3)=\dfrac{10!}{3\times 7!}\\\\C(10,3)=120

a)

C(3,10)=\dfrac{3!}{10!\times (3-10)!}\\\\C(3,10)=\dfrac{3!}{10!\times (-7)!}

and e know the factorial of negative number does not exist.

so, this  is not possible.

Hence, option a is incorrect.

b)

C(10,7)

C(10,7)=\dfrac{10!}{7!\times (10-7)!}\\\\C(10,7)=\dfrac{10!}{7!\times 3!}\\\\C(10,7)=120

Hence, option b is correct.

c)

P(10,3)

P(10,3)=\dfrac{10!}{(10-3)!}\\\\P(10,3)=\dfrac{10!}{7!}\\\\P(10,3)=720

Hence, option c is incorrect.

Hence, C(10,7) is equal to C(10,3).

Hence, option b is correct.

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Answer:

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Step-by-step explanation:

3(x - 9) = 30

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Check your answer by plugging x = 19 back into the equation.

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Multiply.

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Your answer is correct.

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