(6a - 12) - (4a + 4) = ?
Correct answer: D. 2(a-8)
- A. 2(a+2)
- B. 2(a + 4)
- C. 2(a-2)
- D. 2(a-8)
Explanation
To solve this problem, combine like terms, keeping track of the negatives. The expression (6a - 12) - (4a + 4) becomes 6a -12 - 4a - 4, which can be simplified to 2a - 16. The coefficient 2 can be factored out of both terms to get 2(a - 8).
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About Quantitative Reasoning
Quantitative reasoning applies arithmetic and basic algebra to numerical relationships, including percentages, ratios, averages, fractions, proportions, profit and loss, rates, time, work and measurement. Questions focus on translating words into equations, choosing an efficient method and checking whether the result is numerically reasonable.
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