Explain how to use a number line to show that opposite quantities combine to make 0

This is a standard deviation contest. Which of the following sets of four numbers has the smallest possible standard deviation? A. 7, 8, 9, 10 B. 5, 5, 5, 5 C. 0, 0, 10, 10 D. 0, 1, 2, 3

How do you do systems of two equations? Problem: y=-3x+4, y=3x-2

The solution to the equation (2/3) x - 4 = 6 is x = - 3

How do we represent 71 in a form of decimal?

What is 500,000-437,981 step by step

Each month for 9 months, Jordan buys 2 sports books. How many more sports books does he need to buy before has bought 25 sports books?

Round to the nearest thousands place if necessary 5/6

Factorise (-3x + 4x - 1).

The length of each stair is 11 inches. what is the rise, r for each stair? Round to the nearest.

The sum of Jason And Mandy age is 35. Ten years ago Jason was double Mandy age. How old are they now?