The answer to the given expression i.e. 4r + 9r - 11r + 7r is 9r.
Given that,
- The given expression is 4r + 9r - 11r + 7r.
- We need to solve the above expression.
Based on the above information, the calculation is as follows:
= 4r + 9r - 11r + 7r
= 20r - 11r
= 9r
Therefore we can conclude that the answer to the given expression i.e. 4r + 9r - 11r + 7r is 9r.
Learn more: brainly.com/question/18293528
