What is the volume of a rectangular solid whose length is 10 in., width is 8 in, and height is 4 in. ?

Answer: Before you answer the problem you need to know the formula. The formula for volume of a rectangular solid is V = length x width x height.

10 in. x 8 in. x 4 in. = 320 cubic inches

## Wednesday, June 30, 2010

## Friday, June 25, 2010

**GED Math: Integers**

Simplify the following:

-9 + 3x + 7 + (-x) + 5 +7x =

Solution: 7 + 9x

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## Thursday, June 24, 2010

**GED Math: Geometry**

Susan is planning to replace the carpet in her living room. Her living room measures 15ft long and 10 feet wide. How many square feet of carpet will she need? Also, at $3.99 a square foot, how much will it cost her?

Solution: Use the formula Area = length x width. 15ft x 10 ft = 150 square feet. At $3.99 per square foot, it will cost Susan $598.50.

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## Wednesday, June 23, 2010

**GED Math Algebra: Solving Equations**

Solve the following equation when x = -3

x^2 + 10 - 3x + 2x =

Solution: 9 +10 - (-9) + (-6) = 22

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## Tuesday, June 22, 2010

**GED Math Algebra: Evaluating equations**

Evaluate the following when y = 6 and x = 2

6 - y + 3(2 + x) =

Solution: 6 - 6 + 3(2+2) = 12

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## Monday, June 21, 2010

**Solution: 75 x 16 = 1200 ounces of punch; 1200 ÷ 128 (128 ounces in a gallon) = 9 gallons, 1 quart, 1 pint**

## Sunday, June 20, 2010

Simplify the following:

(y^2)( y^3) =

(y^2)( y^3) =

**Solution: (y · y)(y · y · y) = y^5**
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## Thursday, June 17, 2010

Susan went to the clothing store and bought a sweater. The sweater was originally priced at $50. What would the cost of the sweater be at 25% off and 5.5% sales tax?

Step one: Find the cost of the sweater. $50 x .75 = $37.50

Step two: Find the sales tax. $37.50 x 0.055 = $2.06

Step three: Add the cost of the sweater and sales tax together. $ 37.50 + $2.06 = $39.56

Step one: Find the cost of the sweater. $50 x .75 = $37.50

Step two: Find the sales tax. $37.50 x 0.055 = $2.06

Step three: Add the cost of the sweater and sales tax together. $ 37.50 + $2.06 = $39.56

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Simplify the following:

(7 + 6)(-3 + 9) - 3(2)=

Answer: 72

(7 + 6)(-3 + 9) - 3(2)=

Answer: 72

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## Wednesday, June 16, 2010

Evaluate the following when x= 7 and y=5.

3(x - y) + 17 =

Answer: 23

3(x - y) + 17 =

Answer: 23

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## Sunday, June 06, 2010

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