Which equation applies the associative property of multiplication 1. (-1/4-5/3)-3/5=-1/4-(5/3-3/5)

2. -5/12•(6/5•1/3)•9/2=(-5/12•6/5)•(1/ 3•9/2)

3. -6/7•8/11•1/3=8/11•(-6/7)•1/3

4. (-7/8•2/5)+(-7/8•3/5)=-7/8•(2/5+3/5 )

rx and sx

step-by-step explanation:

9

step-by-step explanation:

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.