Thanks and okay i will post them in the right forum next time.

How are you doing in terms of math?

]]>1. A woman is four times as old as her son. In 5 years time, she will be three times as old as her son. How old is the woman?

Post your questions in the right forum.

Woman = 4x

Son = x

Woman in 5 years = 4x + 5.

Son in 5 years = x + 5.

4x + 5 = 3(x + 4)

Solving for x I get 10.

The Son is 10 years old.

The woman is 4(10) or 40 years old.

As you know, 40 is three times greater than 10.

Answer:

Woman is 40.

Son is 10.

]]>3. Solve the simultaneous equations: 3b + 8a -1 =0 and 12-a+ 2b =0.

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3b + 8a - 1 = 0...equation A

a + 2b = 0...equation B

Rewrite equation A this way: 8a + 3b = 1.

We now have:

8a + 3b = 1

a + 2b = 0

Solve equation B for a.

a + 2b = 0

a = - 2b

Plug -2b for a in equation A to find b.

Can you take it from here?

This is called the substitution method.

]]>2. The sum of the interior angles of an octagon is equal to?

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The sum of the interior angles of any polygon can be found using the formula: (n-2) • 180 degrees, where n is the number of sides or vertices in the polygon.

For an octagon, which has 8 sides, we can use this formula:

(8-2) • 180 = 6 * 180 = 1080 degrees.

Answer: 1080 degrees.

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