To represent the growth of the two plants, we can set up the following equations:
For Plant A:
- Initial height = 8 inches
- Growth rate = 3 inches per week
The equation for Plant A, where \(x\) is the number of weeks and \(y\) is the height in inches, is: \[ y = 8 + 3x \]
For Plant B:
- Initial height = 12 inches
- Growth rate = 2 inches per week
The equation for Plant B is: \[ y = 12 + 2x \]
Question 2: When will the plants be exactly the same height?
To find out when the plants will be the same height, we need to set the two equations equal to each other:
\[ 8 + 3x = 12 + 2x \]
Now, we can solve for \(x\):
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Subtract \(2x\) from both sides: \[ 8 + 3x - 2x = 12 \] Simplifying this gives: \[ 8 + x = 12 \]
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Subtract 8 from both sides: \[ x = 12 - 8 \] \[ x = 4 \]
So, the plants will be exactly the same height during week 4.
Thus, the answers to the questions are:
- Plant A: \(y = 8 + 3x\)
- Plant B: \(y = 12 + 2x\)
- The plants will be exactly the same height during week 4.