tiffuuu
28.03.2020 •
Mathematics
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An entry pass to a museum costs $12 for a child and $15 for an adult. A total of 300 entry passes were sold, and the total money collected is $4140. The number of $15 entry passes sold are
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Ответ:
Now, let’s make some equations with the provided information.
First, let’s deal with the money
12x+15y=4140
Next, the amount of passes
x+y=300
Then, take the second equation, and subtract y over.
x=300-y
Now, we can substitute the equation above in for x in the first equation
12x+15y=4140
12(300-y) +15y =4140
Distribute the 12
3600-12y+15y=4140
Combine like terms, then subtract 3600 over
3y=540
Divide by 3 on both sides
y=180
So, 180 $15 entry passes were sold
Ответ:
Thats positive linear function :))
Brainliest would be appreciated :))