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natita [175]
2 years ago
14

A local Dominos sold a total of 1600 small pizzas ($9) and pasta dinners ($13) during the Super Bowl. How many of each did Domin

os sell if the total sales were $15,600?
Mathematics
1 answer:
vitfil [10]2 years ago
5 0
S=small pizzas
p=pasta dinners

s+p=1600

9s+13p=15600
multiply first equaiton by -9 and add to the second one

-9s-9p=-14400
<u>9s+13p=15600 +</u>
0s+4p=1200

4p=1200
divide by 4
p=300

sub back

s+p=1600
s+300=1600
minus 300 both sides
s=1300

1300 small pizzas
300 pasta dinners
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