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8 multiple-choice questions and 29 flashcards on Writing and Evaluating Algebraic Expressions, about 5% of the 6th Math: Expressions & Equations bank. Every one carries a written rationale.
Writing and Evaluating Algebraic Expressions is one of 6 chapters in CoStudy's 6th Math: Expressions & Equations bank, and it holds 8 of the bank's 150 multiple-choice questions — roughly 5% of the total. That proportion is not arbitrary: chapters follow the certifying body's published exam outline, and the number of questions in each is set by that domain's published weight, so the share of your practice time this chapter takes matches the share of the real exam it accounts for.
Studying by chapter is worth doing once you have a diagnostic score. A single overall percentage tells you whether you are close; it does not tell you which domain is dragging. Working a weak chapter in isolation, and re-testing it in isolation, is the fastest way to move a score that has stalled — and it is why the mock exams in CoStudy report by domain rather than as one number.
1 questions drawn from this chapter, with the full rationale shown — the controlling principle behind the right answer, and why each wrong option tempts and fails.
Evaluate 3x + 2 when x = 4.
Answer: A — 14
3(4) + 2 = 12 + 2 = 14. (B) skips the +2; (C), (D) misapply.
4 cards from the 29 in this chapter.
Evaluate 2x² when x = 3.
18. (2 × 9 = 18.)
Write an expression for '3 times a number, plus 5'.
3x + 5.
Write an expression for '7 less than y'.
y − 7.
Solve: 7 = x − 5.
x = 12.
These are a sample. The full Writing and Evaluating Algebraic Expressions chapter runs 37 items with per-chapter progress tracking, on the web and in the iOS app.
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