Plz . the expression p(1+r) represents the cost after sales tax is calculated of an item originally priced p and taxed by a rate of r. if you expand the expression, which term expresses the additional amount that you have to pay in tax? 1 r p pr second question ryan has $12 more than three times dale's amount in his saving account. dale has p dollars. which equation can be used to find ryan's amount, m, in dollars? m=12p−3 m=3p−12 m=12p+3 m=3p+12