Two ratios form a proportion if the ratios reduce to the same fraction which two ratios below form a proportion

15/12 15/9 25/10 35/21

Plz me plz i will give a brain just plz

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.