9 A group of friends went to lunch. Their original bill cost $50.00, but they had a coupon for 20% off their meal. Find the discounted price (before tax and tip).
$
A sales tax of 7% was added. What was the total amount including sales tax?
$
The group chose to tip 20%. What is the total amount that their bill cost including tax and tip?
$

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer