Which expression is equivalent to x+3/x2-2x-3 / x2+2x-3/x+1 if no denominator equals zero? A.

B.

C.

D.

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25