Toni can carry up to 18 1b in her backpack. her lunch weighs 1 1b, her gym clothes weigh 2 1b, and her books (b) weigh 3 1b each. how many books can she carry in her backpack?

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

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right