Question 20 is 2/11 i believe
You need to know the length of two sides and the degree of one angle.
12 will fit in the box for number 1
Multiply 209 by 12 to find one year which is 2508
Multiply 2508 by 4 to find 4 years which is 10032
Subtract 8500 from 10032 which is 1532
So he paid 1532 more than the cars original price
I hope thats understandable!
9 is your answer
because 10times35 is 350 -35 is 315