AlgebraEasyExpression for a growing plant's height
Algebra practice question
A plant is 5 centimetres tall and grows 2 centimetres each week. Which expression gives the plant's height, in centimetres, after w weeks?
- A. 5 + 2wCorrect
- B. 2 + 5w
- C. 7w
- D. 10w
Answer: A. 5 + 2w
Start at 5 and add 2 for each week.
Why the other answers are wrong
- B. 2 + 5w
- This swaps the starting height and the growth rate.
- C. 7w
- This adds the two numbers and forgets the starting height.
- D. 10w
- This multiplies the two numbers.
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