Which term best describes a proof in which you assume the opposite of what you want to prove?

a. proof by syllogism

b. proof by converse

c. proof by contrapositive

d. proof by contradiction

Which of the following pairs of functions are inverses of each other? o a. f(x)=x72+8 and 96-9 = 7/x+2) =8 o b. f(x)= 6(x - 2)+3 and g(x) - *#2-3 o c. $4) = 5(2)-3 and 90- 4*: 73 o d. f(x) = 6)-12 and 910 – +12

Hi, can anyone show me how to do this problem? 100 points for this. in advance

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?