Why is the opposite of a negative number a positive number?

Find the mean of the following numbers. 14, 17, 21, 28, 40

The sum of two numbers is 39. one number is 2 times as large as the other. what are the numbers?

Which is the better buy? 12 bars of soap for $10.00 or 5 bars of soap for $4.00

What is 2 1/8 times 1/16

At the candy store there are 1400 gumdrops and 3150 chocolate bars, for a total of 4550 candies all together. What is the ratio of candies to gumdrops? Reduce your ratio to lowest terms

Solve the formula for a, the acceleration due to gravity

Shelley is building a brick wall that needs to be 1.57 meters tall. So far, the wall is 1.54 meters tall, How much taller does the brick wall need to be? meters

Andre's garden has been infested by weeds. he noticed on the first day that there were 3 weeds and on the next day there were 50% more weeds. a. write an equation describing this situation b. find out how many weeds there are in the garden

The ingredients in a bread mix total 48oz if 85% is dry ingredients, how many ounces (to the nearest whole ounce) of wet ingredients are in the mix?

An ordered set of numbers or objects is a