Inline skates are on sale for 35% off the regular price. a. What fraction off is the discount? b. The original price of one pair of inline skates is $24.99. What is the sale price? ( use a dollar sign$ and NO SPACES in your answer) c. A tax of 5% is computed on the sale price. What is the total cost of the inline skates? ( use a dollar sign$ and NO SPACES in your answer)

I’m stuck on this i don’t understand.

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?

How do newtons third law of motion demonstrates on a rollar coster