## Wednesday, June 30, 2010

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

## Friday, June 25, 2010

GED Math: Integers

Simplify the following:

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

Solution: 7 + 9x

## 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.

## 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

## 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

## Monday, June 21, 2010

Mrs. Smith is serving punch at her daugher's graduation party. She is planning on having 75 people attend and was told that she should average 16 oz. of punch per person. How much punch should she make?

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) =

Solution: (y · y)(y · y · y) = y^5

## 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
Simplify the following:

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

## Wednesday, June 16, 2010

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

3(x - y) + 17 =

## Sunday, June 06, 2010

What is.....

-9 + 10 -(-5) +5 - (6)