Can someone check my answer, I always feel a little insecure if I don't have someone double check it.

Find the value of y

I got 9 cm

What is a rational number between 9.5 and 9.7

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

Abag contains 10 white golf balls and 6 striped golf balls. a golfer wants to add 112 golf balls to the bag. he wants the ratio of white to striped gold balls to remain the same. how many of each should he add?