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3 years ago

Mark is six years older than his brother Sam. The sum of their ages is 30. Let 'a' be Sam's age.

Mathematics

1 answer:

svlad2 [7]3 years ago

8 0

Answer:

a = 12 years

Step-by-step explanation:

Mark is 6 years older than his brother Sam. Now, we are asked to represent Sam’s age by a. This means that if Sam is a years old, Mark is (a + 6) years old.

The sum of their ages is 30, this means that when we add their ages together, we get the sum of thirty.

Mathematically this means a + a + 6 = 30

2a + 6 = 30

This is the equation needed to get a. To get a , we proceed to solve the equation to completion.

2a = 30 - 6

2a = 24

a = 24/2

a = 12

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Step-by-step explanation:

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Roots of the polynomial are described hereafter:

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Only the first root is reasonable, as length is a positive variable. The length is $AB \approx 4.054$ .

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