Original cost minus the 10% discount

Hi! I will try my best to answer your question, the wording provided is unclear.

If the 10% of the original cost of something is $1.50, then the total cost is $15.00.

Assuming this is the discounted price, which would be 90% of the original cost, the original cost would be $16.67.

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