Number operation review 8 docx

... 1: x y 1234567 1 2 3 4 5 –1 –2 –3 –1–2–3–4–5–6–7 –ALGEBRA REVIEW 83 Practice Question If x 2 Ϫ 8x ϭ 20, which of the following could be a value of x 2 ϩ 8x? a. Ϫ20 b. 20 c. 28 d. 1 08 e. 180 Answer e. This question requires ... x 2 ϩ 8x, plug in the x values: If x ϭϪ2, then x 2 ϩ 8x ϭ (Ϫ2) 2 ϩ (8) (Ϫ2) ϭ 4 ϩ (Ϫ16) ϭϪ12. None of the answer choices is Ϫ12, so try x ϭ 10. If x ϭ 10, then x...

Ngày tải lên: 07/08/2014, 22:20

... 10) –ALGEBRA REVIEW 85 Practice Question 1,3,9,27 ,81 , What is the thirty-eighth term of the sequence above? a. 3 38 b. 3 ϫ 1 37 c. 3 ϫ 1 38 d. 1 ϫ 3 37 e. 1 ϫ 3 38 Answer d. 1,3,9,27 ,81 , is a geometric ... 1 when determining a term in any geometric sequence. –ALGEBRA REVIEW 87  Rational Equations and Inequalities Rational numbers are numbers that can be written as fractions...

Ngày tải lên: 07/08/2014, 22:20

... is a whole number; ͙72 ෆ ≈ 8. 485 ; ͙ 78 ෆ ≈ 8. 832; 80 ෆ ≈ 8. 944; 88 ෆ ≈ 9. 381 ; 81 is a per- fect square because 81 ෆ ϭ 9. –NUMBERS AND OPERATIONS REVIEW 44  Negative Exponents Negative exponents ... 78 c. 80 d. 81 e. 88 Answer d. Answer choices a, b, c, and e are incorrect because they are not perfect squares. The square root of a perfect square is a whole number; ͙72...

Ngày tải lên: 07/08/2014, 22:20

... because n > 2. –NUMBERS AND OPERATIONS REVIEW 50 Factors Factors of a number are whole numbers that, when divided into the original number, result in a quotient that is a whole number. Example The ... number. Example The factors of 18 are 1, 2, 3, 6, 9, and 18 because these are the only whole numbers that divide evenly into 18. The common factors of two or more numbers are the...

Ngày tải lên: 07/08/2014, 22:20

... equal number of digits in each number. Example Compare 0 .8 and 0.0 08. Line up decimal points 0 .80 0 and add zeroes 0.0 08. Then ignore the decimal point and ask, which is greater: 80 0 or 8? 80 0 ... than 8, so 0 .8 is greater than 0.0 08. Practice Question Which of the following inequalities is true? a. 0.04 < 0.004 b. 0.17 < 0.017 c. 0 .83 < 0 .80 d. 0.29 < 0.3...

Ngày tải lên: 07/08/2014, 22:20

... is 4. sum of numbers in set ᎏᎏᎏ quantity of numbers in set –NUMBERS AND OPERATIONS REVIEW 60 The mode of a set of numbers is the number that occurs most frequently. Example For the number set ... 39% e. 41% Answer c. ᎏ 2 7 5 ᎏ ϭ ᎏ 1 2 0 8 0 ᎏ ϭ 28% 0. 38 ϭ 38% Therefore, 28% < x < 38% . Only answer choice c, 34%, is greater than 28% and less than 38% .  Graphs and Tables The...

Ngày tải lên: 07/08/2014, 22:20

... 5 12 3   10 5 12 3   24 6 35 2   −21 2 −1   11 11 4 4   7 8 8 7   43 71  +  62 52  = –NUMBERS AND OPERATIONS REVIEW 67  Equations To solve an algebraic equation with one variable, ... lemonade. Lemonade Sold Vanessa James Lupe 0 2 4 6 8 10 12 14 16 Hour 1 Hour 2 Hour 3 Cups of Lemonade Sold HS GPA College GPA –NUMBERS AND OPERATIONS REVIEW 65 Practice Question Which of...

Ngày tải lên: 07/08/2014, 22:20

... 28 ϭ 22 Ϫ 12x, what is the value of x? a. Ϫ6 b. Ϫ ᎏ 2 6 5 ᎏ c. 2 d. 6 e. 50 Answer c. To solve for x: 13x Ϫ 28 ϭ 22 Ϫ 12x 13x Ϫ 28 ϩ 12x ϭ 22 Ϫ 12x ϩ 12x 25x Ϫ 28 ϭ 22 25x Ϫ 28 ϩ 28 ϭ 22 ϩ 28 25x ... 4 Ϫ 16b e. 24 Ϫ 16b Answer a. To solve for a in terms of b: 8a ϩ 16b ϭ 32 8a ϩ 16b Ϫ 16b ϭ 32 Ϫ 16b 8a ϭ 32 Ϫ 16b ᎏ 8 8 a ᎏ ϭ ᎏ 32 Ϫ 8 16b ᎏ a ϭ 4 Ϫ 2b 72 Special Tips for Checking Equ...

Ngày tải lên: 07/08/2014, 22:20

... factor. ᎏ 64x 3 8 ϩ x 24x ᎏ ϭ ᎏ 6 8 4 x x 3 ᎏ ϩ ᎏ 2 8 4 x x ᎏ ϭ 8x 2 ϩ 3 Thus, factoring 64x 3 ϩ 24x results in 8x(8x 2 ϩ 3). Practice Question Which of the following are the factors of 56a 5 ϩ 21a? a. 7a(8a 4 ϩ ... factor: ᎏ 56a 5 7 ϩ a 21a ᎏ ᎏ 8a 5 a ϩ 1 3a ᎏ Subtract exponents when dividing. 8a 5 Ϫ 1 ϩ 3a 1 Ϫ 1 8a 4 ϩ 3a 0 A base with an exponent of 0 ϭ 1. 8a 4 ϩ 3(1) 8a 4 ϩ 3 Theref...

Ngày tải lên: 07/08/2014, 22:20

... 19 Therefore, the solution to the system of equations is y ϭ 4 and x ϭ 19. –ALGEBRA REVIEW 89 f(x) ϭ 8x Ϫ 2 becomes f(3) ϭ 8( 3) Ϫ 2f(3) ϭ 24 Ϫ 2 ϭ 22 So, when x ϭ 3, the value of the function is 22. Potential ... ϭ For example, consider the function f(x) ϭ 8x Ϫ 2. If you are asked to find f(3), you simply substitute the 3 into the given function equation. –ALGEBRA REVIEW 90 When f(x) ϭ...

Ngày tải lên: 07/08/2014, 22:20