Is 6.78778777 irrational?

Use a matrix to find the solution to the system of equations. {-8x-8y=-16 {6x-9y=-108 A. (-6,8) B. (6,8) C. (8,-6) D. (6,-8)

Alya planted 30 trays of flowers. Each tray held 8 flowers. Javon. Planted 230 flowers. Did Alya plant more flowers than javon, the same number of flowers as javon, or fewer flowers than javon?

If your car gets 37.5 miles per gallon, how many km/l is this?

Sarah used her calculator to find sin 125°. She wrote down sin 125° = -.57. How could Sarah recognize that her answer is incorrect?

Four more than a number is no more than 13

Triangle ABC has side lengths 10, 14, and 26. Do the side lengths form a Pythagorean triple? Explain.

Combine the like terms to an equivalent expression 4q+3+2q-1=

Lisa is using the equation x2 + (x - 5) 2 = 157 to find two numbers that differ by 5 and that have squares that sum to 157.

By installing efficient water fixtures, the average American can reduce water use to about 45 gallons of water per day. Using such water fixtures, about how many gallons of water would be the average American use in December?

Solve the system of linear equations by solving y<2x-4