Please help find the greatest common factor for these two problems

Mathematics

1 answer:

vekshin12 years ago

5 0

A greatest common factor is the largest number that goes into two or more numbers (in this case two). To find the GCF of two numbers, we have to find the prime factorization (how to express a number as a product of prime numbers) and then see which numbers are common in both of the prime factorizations.

13. The prime factorization of 8 is 2 * 2 * 2. The prime factorization of 26 is 2 * 13. Looking at the prime factorizations, we can see that both of them have 2. That means that the GCF is 1 * 2 which is 2.

12. The prime factorization of 105 is 3 * 5 * 7. The prime factorization of -30 is -5 * 6. We see that the number shared 5. That means that the GCF is 5 * 1 or 5.

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You need about 1 1/2 hours to set up a computer workstation. At this rate, how many hours should it take you to set up 7 of thes

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Answer:

You would need 10 1/2 hours to set up 7 workstations.

Step-by-step explanation:

Multiply the amount of workstations by the rate at which they are set up.

$7 * 1.5 = 10.5$