1/4 times 1/4 equals how much?

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

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?