Linear Inequalities in One or Two Variables Flashcards
7 cards from real Bluebook SAT Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Linear Inequalities in One or Two Variables flashcards as text
Solve for x: −3x + 6 > 15
Answer: x < −3
−3x > 9 → x < −3 (flip when dividing by −3).
What is the graph of 2x + 1 < 7 on a number line?
Answer: Open circle at 3, arrow left
2x < 6 → x < 3; strict inequality uses open circle, arrow pointing left.
Jacob can spend no more than $50. He picks up one book at $14. Each additional book costs $9. What is the maximum number of additional books he can buy?
Answer: 4
14 + 9b ≤ 50 → 9b ≤ 36 → b ≤ 4.
Solve: 4 < 2x + 2 ≤ 12
Answer: 1 < x ≤ 5
Subtract 2 from all parts: 2 < 2x ≤ 10; divide by 2: 1 < x ≤ 5.
The sum of a number and 6 is at most 10. Which inequality represents this?
Answer: n + 6 ≤ 10
'At most 10' means ≤ 10, so n + 6 ≤ 10.
Which value of y does NOT satisfy 3y − 2 < 10?
Answer: y = 4
3y < 12 → y < 4; y = 4 does not satisfy y < 4.
At a carnival, rides cost $2.50 each and food costs $8. Leila has $28. After buying food, how many rides can she go on at most?
Answer: 8
8 + 2.50r ≤ 28 → 2.50r ≤ 20 → r ≤ 8.
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