Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2
a) x+2/x-1
b) x+2
c) -2
d) x+2/x-2

Find the length of the following tangent segments to the circles centered at o and o' whose radii are 5 and 3 respectively and the distance between o and o' is 12. what is the tangent segment of cd?

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

Abcd is a square. what is the measure of angle bac