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

Joel has an annual salary 34,840. He works 40 hours a week, 52 weeks a year. How much does Joel earn per hour?

How do you simplify an algebraic equation

How to solve - 8-7x+5=4

What number line represents the solution set for the inequality 3x < - 9?

Jones Elementary is having a car wash to raise money for a community horse trail. Each car wash ticket costs $8. Tiara says the school will reciee $1,000 if 125 tickets are sold.

Put in order from greatest to least: 0.6, 71%, 5/6, 56%.

What is the least common multiple of 27, 12, and 36

What is the simplest form of the expression 6x (x - 4) - 16x2 - (9x - 1)

What is another variable for 7x + 14

What is the least value of the data represented by the box plot? Enter your answer in the box. A number line ranging from 5 to 45 with a box encompassing the numbers 20, 25, and 30.