Celery is on sale at both greg's market in the veggie emporium at greg's market a 5 pound bag of celery cost $2.85 and a veggie emporium a 7 pound bag of celery cost $4.20 which store offers the best deal on celery and what is the unit rate of celery at the store with the best rate

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