SAT Mc Graw Hill 2011
250 MCGRAW-HILL’S SAT SAT Practice 4:SimplifyingProblems If 3y− 4 z= 6 and 2y+z= 10, then y− 5 z= (A) 12 (B) 6 (C) 4 (D) 0 (E) ...
CHAPTER 6 / WHAT THE SAT MATH IS REALLYTESTING 251 D Begin by simplifying ^3 −^2 by substitution: But be careful not to pick ( ...
252 MCGRAW-HILL’S SAT Lesson 5:Connecting to Knowledge Know What You Need Some SAT math questions require you to use special for ...
CHAPTER 6 / WHAT THE SAT MATH IS REALLYTESTING 253 Concept Review 5:Connecting to Knowledge Write out each formula, theorem, def ...
254 MCGRAW-HILL’S SAT SAT Practice 5:Connecting to Knowledge If xis the average (arithmetic mean) of kand 10, and yis the avera ...
CHAPTER 6 / WHAT THE SAT MATH IS REALLYTESTING 255 1.8 Key formula: The Pythagorean theorem: c^2 = a^2 + b^2. Key theorem: In s ...
256 MCGRAW-HILL’S SAT Keep Your Options Open There are often many good ways to solve an SAT math problem. Consider different str ...
CHAPTER 6 / WHAT THE SAT MATH IS REALLYTESTING 257 Concept Review 6: Finding Alternatives When can a multiple-choice problem be ...
258 MCGRAW-HILL’S SAT SAT Practice 6: Finding Alternatives Try to find at least two different ways of solving each of the follow ...
CHAPTER 6 / WHAT THE SAT MATH IS REALLYTESTING 259 test choice (B) next. If Ellen weighs 120 pounds, then Jim weighs 290 − 120 = ...
260 MCGRAW-HILL’S SAT b– 1, is 6. The only positive integer pairs with a prod- uct of 6 are 2 ×3 and 1 ×6, so one possibility is ...
CHAPTER 6 / WHAT THE SAT MATH IS REALLYTESTING 261 Concept Review 7:Thinking Logically What is a proof, and why is understandin ...
262 MCGRAW-HILL’S SAT If (m + 1)(n+ 1) = 1, which of the following can be true? I. mand nare both positive. II. mand nare both ...
CHAPTER 6 / WHAT THE SAT MATH IS REALLYTESTING 263 SAT Practice 7 A Since ais greater than b, b– amust be a negative number. Si ...
264 MCGRAW-HILL’S SAT Check the Question Always quickly reread the question before marking your answer to make sure that you’ve ...
CHAPTER 6 / WHAT THE SAT MATH IS REALLYTESTING 265 Concept Review 8:CheckingYour Work What are the best strategies for avoiding ...
266 MCGRAW-HILL’S SAT If the 30 students in Ms. Harkin’s class scored an average of 80% on their final exams, and if the 20 stu ...
CHAPTER 6 / WHAT THE SAT MATH IS REALLYTESTING 267 Concept Review 8 Check your answer by plugging it back into the original equ ...
268 MCGRAW-HILL’S SAT sum of all the scores: (30)(80) + (20)(70) and (50)(x). Since these must be equal, 2,400 + 1,400 = 50x Sim ...
269 ESSENTIAL PRE-ALGEBRA SKILLS CHAPTER 7 ✓ Numbers and Operations Laws of Arithmetic Fractions Ratios and Proportions Percent ...
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