New SAT Math workbook

... 3 Added 4 0 0 New 10 3 6. 10 gallons is 2 3 1 4 − of the tank. 2 3 1 4 83 12 5 12 5 12 10 5 120 24 − − == = = = x x x (answer) 7. xy x xyy xy xy xy −− − () = = = = 2 22 2 40 60 2 220 10 + (answer) 8. ... Tests PRACTICE TEST C Section 1 9. (B) 1 2 + 1 2 = r 2 2 = r 2 Area = πr 2 = 2 10. (E) Angle BCA = Angle BAC = 80° There are 20 ° left for angle B. 11. (B)...

Ngày tải lên: 22/07/2014, 11:20

... origin? (A) 2 (B) 2. 5 (C) 42 (D) 43 (E) 5 16. The product of 3456 and 789 is exactly (A) 27 26 787 (B) 27 26 785 (C) 27 26 781 (D) 27 26 784 (E) 27 26 786 17. Susan got up one morning at 7: 42 A.M. and went ... x yields the equation y x = − + 2 4 2 : f xx x x − () = − () − () +=− ()       += − + 2 2 2 22 4 2 2 8 2 2 2 2 ,, o r − + x 2 4 2 The graph...

Ngày tải lên: 22/07/2014, 11:20

... (2, 0): yxb b b = () +=− = − + = − − 02 20 1 02 2 (slope ) The equation for the line is y = –x + 2. For the pairs ( 2, –1) and (2, 1): yxb b b = () += =+ = −− −− 11 22 1 2 1 2 12 0 () () ) () (slope The equation ... Applying the function sin45° = 2 2 , set the value of this function equal to 5 x opposite hypotenuse       , then solve for x: 2 2 ;2 ;===== 5 10 10 2 10...

Ngày tải lên: 22/07/2014, 11:20

... pairs: ( 96) = 80 (2) – 16 (2) 2 = 160 – 64 = 96 ( 96) = 80(3) – 16( 3) 2 = 24 0 – 144 = 96 Note that the equation in choice (C) holds for f (2) = 96 but not for f(3) = 96. Chapter 15 26 6 www.petersons.com 4. ... f(x): g(f(x)) = x 2 + 3 5. (D) f(x 2 ) = x 2 2 , and fx() () 2 = x 2 2 () . Accordingly, f(x 2 ) ữ fx() () 2 = x 2 2 ÷ x 2 2 () = x 2 2...

Ngày tải lên: 22/07/2014, 11:20

... − − 22 5 2 5 2 25 2 2 f ()()( )− = − = − = − − 1 15 1 5 1 5 1 1 f(0) = (0) (5 0 ) = (0)(1) = 0 f (2) = (2) (5 2 ) = (2) ( 25 ) = 50 The range of f(x) = x x 5 − is the set { − 2 25 , − 1 5 , 0, 50 }. ... expression: f 1 2 22 248 1 2 21 4 = () ==ì= f x x x x 12 1 2 1 2 2 2 2 = = = Then, combine the two results according to t...

Ngày tải lên: 22/07/2014, 11:20

... coordinates. 62 2 26 2 44 ++ ,,       = () 2. (C) O is the midpoint of AB. x xx y yy + + + + 4 2 244 0 6 2 1 6 24 === === , , − A is the point (0, 4) . 3. (A) d = ()() = === 84 63 4 3 16 9 25 5 22 22 − ... < 3 2 (B) b > 3 2 (C) b <− 3 2 (D) b < 2 3 (E) b > 2 3 7. If x 2 < 4, then (A) x > 2 (B) x < 2 (C) x > 2 (D) 2 <...

Ngày tải lên: 22/07/2014, 11:20

... = xx yy 21 2 21 2 − + ()() - The distance between ( 3, 2) and (5, –1) is −− + +3+ 935 8 64 73 2 2 22     ()     = () () = =2- -1 - B. The midpoint of a line segment = xxyy 121 2 22 ++ ,       Since ... square = s 2 = 36 Therefore, s = 6 and perimeter = 24 Geometry 20 5 www.petersons.com 3. RIGHT TRIANGLES A. Pythagorean theorem (leg) 2 + (leg) 2 = (hyp...

Ngày tải lên: 22/07/2014, 11:20

... will take twice as long, or 2x hours, to mow the lawn. Mr. Powell Mike 20 x + 20 2x =1 Multiply by 2x to clear fractions. 40 20 2 60 2 30 + = = = x x x minutes Chapter 12 188 www.petersons.com 9. ... equal to 1 2 . x is therefore 6. 5. (C) Michael Barry 2 6 2 1+ x = Multiply by 6x. 21 26 12 4 3 xx x x + = = = Retest 1. (B) Represent the integers as x, x + 2, and x + 4. 3...

Ngày tải lên: 22/07/2014, 11:20

... difference of their squares is 12 0 ? (A) (n + 1) 2 – n 2 = 12 0 (B) n 2 – (n + 1) 2 = 12 0 (C) n 2 – (n + 2) 2 = 12 0 (D) (n + 2) 2 – n 2 = 12 0 (E) [(n + 2) – n] 2 = 12 0 3. Find the average of ... have xy xy 22 22 40 10 0 60 ++= += 9. (D) 11 11 1 1 1 2 1 4 22 xy xy xy +             =          −−    = = 11 1 8 11 22...

Ngày tải lên: 22/07/2014, 11:20

... 11 22 cd −= (A) 16 (B) 34 (C) 2 (D) 15 (E) cannot be determined Chapter 10 15 2 www.petersons.com SOLUTIONS TO PRACTICE EXERCISES Exercise 1 1. (E) 427 49 3 12 3=⋅= 248 216 383 14 7 49 3 7 3 12 3 8 3 7 3 11 ... exactly? (A) .4 (B) .9 (C) . 09 (D) .02 (E) .025 1. The square root of 17 ,6 89 is exactly (A) 13 1 (B) 13 2 (C) 13 3 (D) 13 4 (E) 13 6 2. The number of dig...

Ngày tải lên: 22/07/2014, 11:20

... square root of 13 9.24 is exactly (A) 1. 18 (B) 11 .8 (C) 11 8 (D) .11 8 (E) 11 80 7. Find xx 22 36 25 + . (A) 11 30 x (B) 9 30 x (C) x 11 (D) 2 11 x (E) x 61 30 8. xy 22 + is equal to (A) x + y (B) x ... subtract. 6x + 9y = 21 6x – 4y = 8 13 y = 13 y = 1 6. (A) Multiply first equation by 3, second by 2, then add. 9x + 6y = 15 a + 3b 8x – 6y = 2a + 14 b 17...

Ngày tải lên: 22/07/2014, 11:20

... numbers are 15 , 16 , 17 , 18 , and 19 . Exercise 3 1. (A) 6 12 0 72 0 8 12 5 10 00 10 11 6 11 60 24 2880 12 0 () = () = () = ) 2. (C) 360 18 0 455 220 7 400 57 1 7 () = () = ) , which is 57 .1 to the nearest ... required salary $ 375 . 1. (C) The integers are 1, 3, 5, 7, 9, 11 , 13 , 15 , 17 , 19 , 21, 23, 25, 27. Since these are evenly spaced, the average is...

Ngày tải lên: 22/07/2014, 11:20

... price $4320 Retest 1. (A) $12 1 is 11 0% of the cost. 12 1 = 1. 10x 12 10 = 11 x x = $11 0 2. (A) He earns 6% of ( $ 16 0,000 $20,000). 14 0,000 ì . 06 $8400.00 Add this to his base salary of $10 ,000 and his Christmas ... language 30% = 3 10 3 10 · 14 00 = 420 6. (B) 15 % = 3 20 3 20 · $60 00 = $900 off $ 510 0 net price 10 % = 1 10 1 10 · $60 00 = $60 0 off $5400 f...

Ngày tải lên: 22/07/2014, 11:20

... FRACTION 50 % .5 1 2 25% . 25 1 4 75% . 75 3 4 10 % .1 1 10 30% .3 3 10 70% .7 7 10 90% .9 9 10 33 1 3 % .33 1 3 66 2 3 % .66 2 3 16 2 3 % .16 1 6 83 1 3 % .83 5 6 20% .2 1 5 40% .4 2 5 60% .6 3 5 80% ... · 3 = 18 3. (B) 12 0 90 4 3 13 3 1 3 == % 4. (A) 50 0 = 2x 250 = x 5. (C) 13 7 .5% = 1. 3 75 Retest 1. (C) . 25% = . , 25 10 0 25...

Ngày tải lên: 22/07/2014, 11:20

... dollars. (A) 8 3 D (B) 3 800D (C) 3 8D (D) 800 3 D (E) 10 8 3 D 2. On a map 1 2 inch = 10 miles. How many miles apart are two towns that are 2 1 4 inches apart on the map? (A) 11 1 4 (B) 45 (C) 22 1 2 (D) 40 1 2 (E) 42 3. The toll ... inches. One yard is 36 inches. 1 ft. 3 in. is 15 inches. 15 36 5 12 = 7. (D) There were 40 students at the meeting. 8 40 1 5 =...

Ngày tải lên: 22/07/2014, 11:20