False, y4 would equal 8 if y=2
10x-5
You multiply each term in the parentheses by 5
If you are trying to find 3/4 of 28, multiply 3/4 (or 0.75( by 28), which equals 21.
3/4 • 28 = 21
4/9 , 2/3, 1/6, ....-2 1/2 = - 5/2
common denominator is 18
This is a lowest common multiple question.
to find the lowest common multiple, you need to find the prime factors of the two numbers:


Take out duplicates:

and multiply them together:

and that is your answer.
Easy peasy.