Which of the following is an example of a proper fraction a.6/6 b.15/2 c.4/17 d.11/10

Someone answer this check out the image!

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years