SAT Mc Graw Hill 2011
330 MCGRAW-HILL’S SAT When the Apex Pet Store first opened, the ratio of cats to dogs was 4 to 5. Since then, the number of cat ...
CHAPTER 8 / ESSENTIAL ALGEBRA I SKILLS 331 Concept Review 7 m=Mike’s current age, d=Dave’s current age; m=2(d−5) a=the populati ...
SPECIAL MATH PROBLEMS CHAPTER 9 332 New Symbol or Term Problems Mean/Median/Mode Problems Numerical Reasoning Problems Rate Pro ...
CHAPTER 9 / SPECIAL MATH PROBLEMS 333 New Symbol or Term Problems Example: For all real numbers aand b,let the expression a¿bbe ...
334 MCGRAW-HILL’S SAT Concept Review 1: New Symbol or Term Problems For questions 1–6, translate each expression into its simple ...
CHAPTER 9 / SPECIAL MATH PROBLEMS 335 For all real numbers d, e,and f,let d e f=de+ef+df.If 2 3 x=12, then x= (A) (B) (C) (D ...
336 MCGRAW-HILL’S SAT Answer Key 1: New Symbol or Term Problems y^4 =− 32 Translate: 4 y4–1=− 32 Simplify and divide by 4: y^3 ...
CHAPTER 9 / SPECIAL MATH PROBLEMS 337 Average (Arithmetic Mean) Problems You probably know the procedure for finding an average ...
Draw the “average pyramid.” Explain how to use the average pyramid to solve a problem involving averages. Define a median. Defi ...
If y= 2 x+1, what is the average (arithmetic mean) of 2x, 2 x, y,and 3y,in terms of x? (A) 2x (B) 2x+ 1 (C) 3x (D) 3x+ 1 (E) 3x ...
340 MCGRAW-HILL’S SAT Concept Review 2 It should look like this: When two of the three values are given in a prob- lem, write t ...
both of these are 3, b=3. Therefore, statement II is true, and you can eliminate choice (A). To find the average, just divide th ...
Arithmetic Reasoning 342 MCGRAW-HILL’S SAT Lesson 3: Numerical Reasoning Problems The first statement, m< n< p< r,tells ...
CHAPTER 9 / SPECIAL MATH PROBLEMS 343 If neither anor bis 0, what is the relationship between a÷band b÷a? What is the relations ...
344 MCGRAW-HILL’S SAT SAT Practice 3: Numerical Reasoning Problems If mand nare both odd integers, which of the following must ...
SAT Practice 3 D Start with the simplest odd values for mand n: m =n=1. (There’s no reason why mand ncan’t equal the same numbe ...
346 MCGRAW-HILL’S SAT What Are Rates? The word ratecomes from the same Latin root as the word ratio.All rates are ratios. The mo ...
CHAPTER 9 / SPECIAL MATH PROBLEMS 347 For each of the following rates, write the formula of the rate and the corresponding “rate ...
Janice and Edward are editors at a newspaper. Janice can edit 700 words per minute and Edward can edit 500 words per minute. If ...
CHAPTER 9 / SPECIAL MATH PROBLEMS 349 Concept Review 4 Speed =#miles ÷#hours Efficiency =#miles ÷#gallons Typing speed =#pages ...
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