Math Question
![There are 15 plates in a kitchen cabinet. The diameter of each plate is either 7 inches or 12 inches. The diameter of all 15 plates combined is 140 inches.
Which system of equations can be used to find the number of 7 -inch plates, \( x \), and the number of 12 -inch plates, \( y \), that are in the cabinet?
\( x+y=140 \) \( 12 x+7 y=15 \)
B \( 7 x+12 y=140 \)
\[
7 x+12 y=15
\]
c \( x+y=15 \)
\[
7 x+12 y=140
\]
D \( x+y=15 \)
\[
12 x+7 y=140
\]](https://d3hlidq5bf9vg0.cloudfront.net/app-server-student/2022/4/9/d010b21c-bbf3-4d37-b1e3-6a88bf01c6b3.png "There are 15 plates in a kitchen cabinet. The diameter of each plate is either 7 inches or 12 inches. The diameter of all 15 plates combined is 140 inches.
Which system of equations can be used to find the number of 7 -inch plates, \( x \), and the number of 12 -inch plates, \( y \), that are in the cabinet?
\( x+y=140 \) \( 12 x+7 y=15 \)
B \( 7 x+12 y=140 \)
\[
7 x+12 y=15
\]
c \( x+y=15 \)
\[
7 x+12 y=140
\]
D \( x+y=15 \)
\[
12 x+7 y=140
\]")
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