The number of home theaters a company sells varies directly as the money spent on advertising how many home theaters does the company sell for each $500 spent on advertising

Which statement is always true? a negative exponent cannot be part of an expression's numerator. a negative base raised to the power of 2 has a negative value. a negative base raised to the power of 2 has a positive value. any number to the first power is zero.

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Solve the system of equations y= 3/2 - 1, -x+ y =-3