Andy walked 3/4 of a mile to the post office and another 1/2 to the supermarket. what is a common denominator for 3/4 and 1/2? 10,8,6,5

A common denominator is very similar to the idea of a common multiple. You can think of a common multiple between two numbers as some number that they both go into. In other words, if you started counting by 3s and 5s, 15 would be a common multiple, since you manage to hit that number in both of your counting lists

3, 6, 9, 12, 15

5, 10, 15

Here, we're looking for some number that's a common multiple of 2 and 4. Counting by both numbers and listing those out:

2, 4, 6, 8

4, 8

We find that 8 fits the bill best. 10 and 6 are both multiples of 2, but not of 4, and 5, being an odd number, isn't a multiple of either one.

step-by-step explanation:

in the absence of parentheses, i will have to make some assumptions:   i interpret your (3x+5/y^6)(4y^3/5)​ to mean:

3x + 5     4y^(3/5)       (3x + 5)(4)

* =

    y^6             1               y^(6-3/5)

if this is not what you expected, repost your question using parentheses to indicate whether you meant

4y^3

    or   4y^(3/5)

    5