TAILIEUCHUNG - SAT II Math Episode 2 Part 1

Tham khảo tài liệu 'sat ii math episode 2 part 1', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Mathematics Tests 175 33. The correct answer is C . Make a table of Ar and Ay change in x andy . Ay 4 Ay 1 Ẽ Ỉ 2 Ax 2 3 4 Since the slope is constant the graph is a straight line of the form y 2x b. Substituting x 2 y 3 we see b -1. Hence the equation is y 2x - 1. 34. The correct answer is C . Divide both sides by 8. 8 4 This now resembles the standard form 4-4 1 a1 b2 which is the equation of a hyperbola. 35. The correct answer is D . Rationalize the denominator by multiplying numerator and denominator by 5 2. 2 2 2 2 V2 2 36. The correct answer is B . For the equation Kx2 - 4x K 0 to have real roots its discriminant must be 0. 16 - 4K2 0 16 4K2 4 K2 This is equivalent to K 2 or - 2 K 2 37. The correct answer is B . In the original solution there are .20 X 10 2 quarts of alcohol. After 2 quarts of water are added the resulting solution has the same 2 quarts of alcohol in 12 quarts of solution. ARCO SAT II Math arco 176 Part V 38. The correct answer is E . Write .212121 . as the sum of the terms of an infinite geometric progression. s .21 .0021 .00002Id a .21 andr .01 a .21 .21 _ 1-r _ .99 5 99 33 39. The correct answer is D . mZP - QRT-QsT Let m QST X0 Then m QRT 360 - X0 Substitute in the first equation. 70 360-x-x Combine terms and multiply by 2. 140 360-2x 2x 360-140 2x 220 x 110 40. The correct answer is A . Assume the water rises to a height of X inches. Then 15 18 X 12 12 12 1 cu ft . 270x 1728 2 X 6 5 arco ARCO SAT II Math Mathematics Tests 177 41. The correct answer is C . A total distance Average rate ----- total time The time going is and the time coming is - . The total time is _ _ - É A-M-_ 30 60 _ 60 60 _ 60 _ 20 A 2rf_40J Average rate - 40 mph a d 20 42. The correct answer is E . Sum of roots a -a 5 - a 7 43. The correct answer is B . Since 152 92 122 XPQR is a right triangle with a right angle at R. OX OY radius of the inscribed circle and since OXRY is a square the radius also equals RX or RY. .

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