3 years ago

Please help me asap!!!

Mathematics

1 answer:

Nina [5.8K]3 years ago

8 0

Use the interior angle theorem

(7-2)180 = 900

900 / 7 = roughly 128.6

your answer is C

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Step-by-step explanation:

Let x be the age of William and y be the age of Charmaine

Then

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x = y+3 Eqn 1

The sum of 3 times Charmaine's age and 2 times William's age is 76.

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Putting x = y+3 in Eqn 2

$2(y+3)+3y=76\\2y+6+3y=76\\5y+6=76\\Subtracting\ 6\ from\ both\ sides\\5y+6-6=76-6\\5y=70\\Dividing\ both\ sides\ by\ 5\\\frac{5y}{5} = \frac{70}{5}\\y=14\\Putting\ the\ value\ of\ y\ in\ Eqn\ 1\\x=y+3\\x=14+3\\x=17$

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Keywords: Linear equations, Variables

Learn more about linear equations at:

#LearnwithBrainly

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3 years ago