Expand and simplify 9 (x-y) ^2-9 (x+y) (x-y)

f (x) = ax + b and g (x) = x-4, where a and b are constant. If fg (4) = 2 and gf (2) = 4, find the values of a and b.

What is 9.33 in fraction form

Sketch one cycle of the cosine function. y = 2 cos 2 theta

A cube has a surface area of 96 sq. in. What is the length of its side?

Tera is training for a bicycle race. Each week she rides a total distance greater then 10 kilometers and less than or equal to 30 kilometers.

A right triangle has legs that are 19 in. and 23 in. What is the area of the triangle

What equation results from completing the square and then factoring x2+4x=12

In two years the value of a car chnaged from 14,000 to 11,200 what is the percent of change

What is the difference 4 1/3 - (-2/3)

Elaine is painting a fence. she knows that she needs 1 gallon of paint for each 10 feet of fencing. The fencing will enclose a rectangular yard that is 3 yards long and 2 yards wide. how much paint does Elaine need?