Why is the sum of a rational number and its opposite always equal to 0

What is the median of 8 22 19 12 18 19 10 35 12 19 16 21?

A carton of paper is priced at $27.00 now. If the paper goes on sale for 25% off the current price, what will be the sale price of the carton?

You are making a flower arrangement. There will be 32 flowers in the arrangement. Roses cost $2 each and carnations are $1 each. You have $50 to spend on the arrangement. How many of each flower can you buy?

What professionals most directly use geometry

A 6 inch personal pizza has 640 calories, with 240 of those from fat. A 14 inch pizza is cut into 8 slices. Estimate the number of calories in one slice of a 14 inch pizza to the nearest calorie.

The following rates are proportional. $0.70 for 2 boxes and $1.75 for 5 boxes TrueFalse quick

If p (x) = x^4-2x^3 - 3x^2 + 4, what is the remainder of p (x) divided by (x - 3)

Given thatx x=time (hours) and y=distance (miles), find the rate of change: (2,70) (5,175)

Y equals 8 X equals 575 Solve for slope intercept y equals mx + b

The population of a country has been decreasing for several decades. In 1990, the population was about 165 million people. In 2010, the population was about 158 million people.