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SVEN [57.7K]
3 years ago
13

Ms. England is planning a party for students who have met their goal of reading seven books during the most recent nine weeks of

school. Using a total of $112, she plans to get pizzas that cost $12 each and drinks that cost $0.50 each. If she purchases four times as many drinks as pizzas, how many of each should she buy? • Show how you know. • Create equations and use substitution and a table to demonstrate the solution.
Advanced Placement (AP)
1 answer:
Gennadij [26K]3 years ago
7 0

Answer:

Ms. England should buy 8 pizzas and 32 drinks.

Explanation:

Let p = the number of pizzas and d = the number of drinks.  Each pizza costs $12 so the cost of all of the pizzas is ($12)*p.  Each drink costs $0.50, so the cost of all of the drinks is ($0.50)*d.  The total cost, then, is:

 

Total Cost = Cost of Pizzas + Cost of Drinks

 

$112 = ($12)p + (($0.50)*d

 

Now you buy 4 times as many drink as pizzas, so:

 

Number of Drinks = 4 * (Number of Pizzas)

 

d = 4*p

 

Now lets' substitute 4p in place of d in the total cost equation and solve for p:

 

$112 = ($12)p + ($0.50)*d

$112 = ($12)p + ($0.50)*(4p)        [Substituted 4p in place of d]

112 = 12p + 2p

112 = 14p

 

Solve for p, the number of pizzas.  Once you have p, the number of drinks is d = 4*p.

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