Mary wants to buy one large pizza, one medium pizza, and three drinks. The drinks cost $p$ dollars each, the medium pizza costs two times as much as one drink, and the large pizza costs three times as much as one drink. If Mary started with $30$ dollars, how much money would she have left after making all of her purchases? Give your answer as an expression of $p$.

Question

Mary wants to buy one large pizza, one medium pizza, and three drinks. The drinks cost $p$ dollars each, the medium pizza costs two times as much as one drink, and the large pizza costs three times as much as one drink. If Mary started with $30$ dollars, how much money would she have left after making all of her purchases?  Give your answer as an expression of $p$.

xapproachesinfinity · Answer

well start like this, 3 drinks for p dollars each
so 3p dollars for all of the three drinks
then the medium pizza costs 2 times as much as one drink so 2p dollars for one medium pizza
then the large pizza costs 3p dollars
so 30 -(3p +2p +3p)=30-8p

xapproachesinfinity · Answer

that's the expression you are looking for

anonymous · Answer

ok thanks!

xapproachesinfinity · Answer

if they give us what p is we would know how much each one costs

xapproachesinfinity · Answer

let's assume that one drink costs 1,25 dollars how much is the cost of
large pizza and medium pizza?

anonymous · Answer

I don't get what the answer is

xapproachesinfinity · Answer

well look again and read the info
one large pizza cost 3 times as much as the cost of one drink
we assumed one drink costs 1,25
so 1,25 +1,25+1,25=$3,75
medium costs twice as much as the cost of one drink
so 1,25+1,25=2,50
three drinks would be 3,75
so the total that Mary will be charged is 
3,75+3,75+2,50=$10

xapproachesinfinity · Answer

i'm just giving you the sense of what's going on using an example

xapproachesinfinity · Answer

this is something that you do in your everyday life

anonymous · Answer

oh I got the answer right 
thanks

xapproachesinfinity · Answer

Weclcome