What does 64 mean in standard algorithm

Solve each system by substitution. (-3x + y = 20) (-5x - 7y = - 10)

Stacey bought a shirt for $20. Amy got the same shirt a week later during a sale. Amy got hers for $11. What was the percent of discount? Show your work.

What is the equation of a hyperbola with a = 6 and c = 8? Assume that the transverse axis is horizontal.

In his free time, Gary spends 11 hours per week on the Internet and 9 hours per week playing video games. If Gary has five hours of free time per day, approximately what percent of his free time is spent on the Internet and playing video games?

Ben can buy a package of 5 tshirts for 26.25 or a package of 3 tshirts for 14.25. what is the unit price per t-shirt in each package?

What is four sixths minus five sixths

Ramal filled 3 pages in a stamp album. This is one sixth of the pages in the album. How many pages are three in Ramal's stamp album?

If f (x) = 2-X1/2 and g (x) = x^2-9, what is the domain of g (x) divided by f (x)

Jamilla is making a triangular wall

What quadrilateral is neither a parallelogram nor a trapezoid?