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3 years ago

Maggie's brother is 3 years younger than twice her age. The sum of their ages is 36. How old is Maggie? Maggie is years old.

Mathematics

1 answer:

Triss [41]3 years ago

4 0

Answer:

Maggie is 13 years old.

Step-by-step explanation:

Maggie's age is: x

Maggie's brother's age is: 2x - 3

The sum of the ages = 36

x + 2x - 3 = 36

3x - 3 = 36

3x = 39

x = 13

Answer: Maggie is 13 years old.

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$\frac{ {sin}^{2}(a) + 2 \sin(a) - {cos}^{2} (a) + 1 }{ {sin}^{2}(a) + 2 \sin(a) \cos(a) + {cos}^{2}(a) - 1 } =$

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As you know :

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2 years ago

Jason solved the following equation to find the value for x. –8.5x – 3.5x = –78 x = 6.5 Describe how Jason can check his answer.

sweet-ann [11.9K]

Answer: Jason can substitute $x=6.5$ into the equation. The left side of the equation must be equal to the right side of the equation.

Step-by-step explanation:

The equation $-8.5x-3.5x=-78$ must be solved by calculating the value of the variable x:

Add like terms:

$-12x=-78$

Divide both sides by -12:

$\frac{-12x}{-12}=\frac{-78}{-12}\\\\x=6.5$

Once Jason solves for x, he has to substitute $x=6.5$ into the equation and simplify to check his answers.

If his answer is right, the left side of the equation will be equal to the right side of the equation.

Then:

$-12(6.5)=-78\\-78=-78$

$x=6.5$ is a solution of the equation.

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