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2 years ago

Find the greatest comman factor of 15 and 20

Mathematics

2 answers:

Vinil7 [7]2 years ago

6 0

Answer:

GCF(15,20) = 5

Step-by-step explanation:

Prime Factorization of 15

Prime factors of 15 are 3, 5. Prime factorization of 15 in exponential form is:

15 = 31 × 51

Prime Factorization of 20

Prime factors of 20 are 2, 5. Prime factorization of 20 in exponential form is:

20 = 22 × 51

Factors of 15

List of positive integer factors of 15 that divides 15 without a remainder.

1, 3, 5

Factors of 20

List of positive integer factors of 20 that divides 15 without a remainder.

1, 2, 4, 5, 10

Greatest Common Factor

We found the factors and prime factorization of 15 and 20. The biggest common factor number is the GCF number.

So the greatest common factor 15 and 20 is 5.

Darina [25.2K]2 years ago

4 0

The greatest common factor of 15 and 20 is 5

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1. The larger of two supplementary angles is 15 more than twice the measure of the smaller angle. Find each angle measure.Help

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Step-by-step explanation:

Supplementary means that they add up to 180.

x + y = 180

Let's let x be the larger angle.

x = 15 + 2y

The above equation comes from the information given, that it's 15 more than twice the smaller angle.

Now let's use substitution.

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The smaller angle is 55. Plug this back in to the first equation to get x.

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