Question detail
exam warm-up: simplify 3x + 4x 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. 7x
- B. 8
- C. 6
- D. 14
Answer
The correct answer is 7x.
Explanation
The locked answer is 7x. Work through the given values, keep one operation per line, and check the final step reaches 7x.
Common mistake
Substitution common mistake 1
Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Substitute numerical values into formulae and expressions, including scientific formulae supplied in a question..
Show the method first, then give the final answer in the required form. Apply this directly to Substitution.
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