The circle graph shows the results of a survey in which 250 students were asked to choose their favorite color. How many more st
udents chose purple than red as their favorite color?
1 answer:
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Answer:
Step-by-step explanation:
Let
x = cost for one adult
y = cost for one child
z = cost for one senior.
<u>The Reid family:</u>
take 2 adults and 2 children and paid that is
, so
<u>The Mghee family:</u>
take 1 senior, 2 adults and 1 child and paid that is
, so
<u>The Griffiths family:</u>
take 1 senior and 3 adults and paid that is
, so
You get the system of three equations:
From the first equation:
From the third equation:
Substitute them into the second equation:
Then
Hence,
the cost for one adult is
the cost for one child is
the cost for one senior is
<u>The Linton family</u> takes 1 senior, 2 adults and 3 children and paid