New SAT Math Workbook

A b c d e 420 320 160 210 330 23 if b

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Unformatted text preview: chickens laying 9 or fewer eggs per week: (2)(9) + (4)(8) + (5)(7) + (3)(6) + (2)(5) + (0)(4) + (2)(3) = 119 eggs. To find the number of chickens that laid 10 eggs during the week, subtract 119 from 179 (the total number of eggs): 179 – 119 = 60. Then divide 60 by 10 to get 6 chickens. 5. 6. (E) Put the equation given in the question into the form y = mx + b: 4x − 2y = 6 2y = 4x − 6 y = 2x − 3 The line’s slope (m) is 2. Accordingly, the 1 slope of a line perpendicular to this line is – . 2 Given a y-intercept of 3, the equation of the 1 perpendicular line is y = – x + 3. Reworking 2 this equation to match the form of the answer choices yields 2y + x = 6. www.petersons.com Additional Geometry Topics, Data Analysis, and Probability 311 10. (E) For each year, visually compare the difference in height between Country X’s white bar and Country Y’s dark bar. (For each year, the left-hand bars represent data for Country X, while the right-hand bars represent data for Country Y.) A quick inspection reveals that only for the year 1990 is Country Y’s dark bar approximately twice the height of Country X’s white bar. Although you don’t need to determine dollar amounts, during 1990, Country Y’s imports totaled about $55 million, while Country X’s exports totaled about $28 million. 11. (D) Regardless of the number of marbles in the bag, the red : blue : green marble ratio is 4:2:1. As you can see, blue marbles account for 2 of the total number of marbles. Thus, the 7 2 probability of picking a blue marble is 7 . 12. (A) The probability that the left-hand die will 1 NOT show a solid face is 3 in 6, or 2 . The probability that the right-hand die will NOT show a solid face is 2 in 6, or 3 . To calculate the combined probability of these two independent events occurring, multiply: 1×1= 1 . 236 1 www.petersons.com Practice Tests PRACTICE TEST A Answer Sheet 17 15. 16. 17. 18. 19. 20. 21. abcde abcde abcde abcde abcde abcde abcde 22. 23. 24. 25. abcde abcde abcde abcde Directions: For each que...
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