Which of the following statements are true?

Angela rode his bike around a bike trail that was 1/4 of a mile long he rode his bike around the trail 8 * angelo says he wrote a total of 8/4 miles to russell says he's wrong and he actually and says that he actually wrote to my who is corrupt use words and trying to explain how you know.

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).