Each week, ivan earns $m more than lachlan. each week, iain earns $u more than ivan. if lachlan earns $530 per week, how much does iain earn per week?

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

i think it might be a but you might want a second opinion

10 down (bang1)

5 up

5down (2)

2.5 up

2.5 down (3)

1.25 up

1.25 down (4)

now add them up : )

hoped i lol