The average (arithmetic mena) of 10, 30, and 50 is 5 more than the average of 20, 40, and x. Then x = ?
Express 17: 20 is percentage?
What % of 0.25 is 0.01 ?
A student's average test score on 4 tests is 78. What must be the student's score on the 5 ^ (th) * testf the student's average score on the 5 tests to be 80?
How many minutes does it take john to type y words if he types at the rate of x words per minute?
If n is an integer, which of the following must be even?