2) a product originally costs $125. if the product goes on sale for 20% off, and then goes on sale for an additional 30% off, what is the price of the product? a. $62.50 b. $70 c. $65 d. $90
3) if you pay $22.90 for a dvd that includes a 7% sales tax, what is the price of the dvd before the sales tax? a. $21.40 b. $21.30 c. $21.50 d. $20.95

Given: ab ≅ cd and ad ≅ bc prove: abcd is a parallelogram. statements reasons 1. ab ≅ cd; ad ≅ bc 1. given 2. ac ≅ ac 2. reflexive property 3. △adc ≅ △cba 3. ? 4. ∠dac ≅ ∠bca; ∠acd ≅ ∠cab 4. cpctc 5. ∠dac and ∠bca are alt. int. ∠s; ∠acd and ∠cab are alt. int. ∠s 5. definition of alternate interior angles 6. ab ∥ cd; ad ∥ bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3? triangle angle sum theorem sas congruency theorem sss congruency theorem cpctc