3,1,4,5,4,n ; the mode is 4, find n​

If you could answer these your a life saver

1. how do you convert the repeating, nonterminating decimal 0. to a fraction? explain the process as you solve the problem.

Subtract and simplify. (-y^2 – 4y - 8) – (-4y^2 – 6y + 3) show how you got the answer if your answer is right i will mark you