What is the difference between 20 and - 60

5x + 10y = 18 x = y - 6 Which of the following equations is the result of substituting y - 6 in for x in the first equation? a) 5x + 10y - 6 = 18 b) 5y - 6 + 10y = 18 c) 5y - 30 + 10y = 18

Mr. Antoine use 3/8 of a tank of gas each week to drive to and from work. how many tanks of gas does Mr Antoine use in 8 weeks

What is 345.432 plus three hundreds?

If tan x =.67, what is cot x

Mr Riley baked 1692 cookies he sold them in boxes 36 in each for 8 dollars

The equation above can be used to calculate the volume V, of a pyramid with a height h and base with length l and width w. If the volume of a pyramid is 81inches^3, and l=w=3h, what is the length of the base of the pyramid in inches?

What is the relationship between the decimals 0.09 and 0.9

A group of winning ticket holders share equally 90,000,000 lottery. Before the money is divided, three more winning ticket holders are declared. As a result, each persons share is reduced to 5,000,000.

What is the Pythagorean Theorum?

Supposed there exists a planet with 3.6 billion inhabitants