Question detail
answer-form check: simplify 7x + 9x by collecting like terms.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Notation, vocabulary and manipulation
Question
- A. 16x
- B. 21
- C. 11
- D. 32
Answer
The correct answer is 16x.
Explanation
Use the worked steps as the check: the question intent fixes the answer as 16x, and the final-answer line confirms 16x.
Common mistake
Identities and algebraic proof common mistake 1
Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Use algebra to show that expressions are equivalent and to support or construct mathematical arguments..
Show the method first, then give the final answer in the required form. Apply this directly to Identities and algebraic proof.
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