The system of equations representing the system is:
25c + 40p = 445
20c + 35p = 380
Step-by-step explanation:
In order to solve this problem, we call:
c = the price of one cup
p = the price of one plate
We know that:
- Lara bouthg 25 cups and 40 plates, and she paid a total of $445.00. So, this means that
25c + 40p = 445 (1)
- Luis bought 20 cups and 35 plates, and he paid a total of 380.00$. So, this means that
20c + 35p = 380 (2)
We can therefore solve the system of equations to find the price of each cup (c) and of each plate (p). By multiplying the first equation by 4 and the 2nd equation by 5 we get:
100c + 160p = 1780
100c + 175p = 1900
Substracting the 1st equation from the 2nd one,
15p = 120
Which gives
[tex]p=\frac{120}{15}=8[/tex]
And substituting into (1),
[tex]25c+40(8) =445\\25c=445-320\\25p = 125\\p = \frac{125}{25}=5$[/tex]
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