The following equation represents Madison's disposable income after expenditures: Money Leftover=a−b−c, where Income=a,
Needs=b,
and Wants=c.
Her income is $2700
per month. She spends $1150
on rent, car insurance, food, electricity, and phone payments. In addition, she spends $680
on concert tickets.

I think it is $870

Step-by-step explanation:

You would replace the equation a-b-c

a=$2700 b=$1150 c=$680

2700-1150-680= $870

$680

Step-by-step explanation:

The amount $680 that she spends on concert tickets represents her wants.

18a

step-by-step explanation:

simply because it is. it's the highest common factor

y=mx+b is the final answer!   : )