The total income for the Mr. Johnson's apartment building can be represented by the equation 4r-30-3p, where ris the amount of rent
paid by each tenant, c is the cost of the cable bill, and p is the cost of the
phone bill. If the rent is $600, the cable bill is $90 and the phone bill is
$45, what is the total income for Mr. Johnson?
$1,800
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$540
$735
$1,995