What is the difference r+2/r+4 - 3/r+1 a. -1/r+3 b. r^2-1/(r+1)(r+4) c. r^2-10/(r+1)(r+4) d. r^2+14/(r+1)(r+4)

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte