Find the percent change when the original price was $76 and the new price is $60. show your work.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

If the value of cos330°is√3/2 then find cos 165°.

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