Number operation review 7 doc

... Question Which of the following are the factors of 56a 5 ϩ 21a? a. 7a(8a 4 ϩ 3a) b. 7a(8a 4 ϩ 3) c. 3a(18a 4 ϩ 7) d. 21a(56a 4 ϩ 1) e. 7a(8a 5 ϩ 3a) Answer b. To find the factors, determine a common ... can be divided by 7 and both variables can be divided by a. Therefore, a common factor is 7a. Now, to find the second factor, divide the polynomial by the first factor: ᎏ 56a 5 7 ϩ a 21a ᎏ...

Ngày tải lên: 07/08/2014, 22:20

... ϭ x 2 Ϫ 3. x y 123456 1 2 3 4 5 –1 –2 –6 –5 –4 –3 –1–2–3–4–5–6 x y 12345 67 1 2 3 4 5 –1 –2 –3 –1–2–3–4–5–6 7 –ALGEBRA REVIEW 84 Answer b. To simplify the expression, first determine the LCD of ... x 2 except that the base is shifted down (on the y-axis) by 1: x y 12345 67 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 co...

Ngày tải lên: 07/08/2014, 22:20

... the (x Ϫ 2) terms from the top and bottom to yield: x ϩ 7 ϭ 30 Now solve for x: x ϩ 7 ϭ 30 x ϩ 7 Ϫ 7 ϭ 30 Ϫ 7 x ϭ 23 Practice Question If ϭ 17, what is the value of x? a. Ϫ16 b. Ϫ13 c. Ϫ8 d. 2 e. ... 3y ϭ 7 Ϫ (x Ϫ 6y ϭϪ5) (x Ϫ x) ϩ (Ϫ 3y ϩ 6y) ϭ 7 Ϫ (Ϫ5) 3y ϭ 12 y ϭ 4 is the answer. Now substitute 4 for y in one of the original equations and solve for x. x Ϫ 7 ϭ 3y x Ϫ 7 ϭ...

Ngày tải lên: 07/08/2014, 22:20

... various operations with fractions. –NUMBERS AND OPERATIONS REVIEW 49 Odd and Even Numbers An even number is a number that can be divided by the number 2 to result in a whole number. Even numbers have ... in an odd number? a. even number ϩ even number b. odd number ϫ odd number c. odd number ϩ 1 d. odd number ϩ odd number e. ᎏ even n 2 umber ᎏ Answer b. a, c, and d defi...

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 ... Ϫ2 67 on the number line.) Practice Question Which of the following statements is true? a. Ϫ25 > Ϫ24 b. Ϫ48 > 16 c. 14 > 17 d. Ϫ22 > 19 e. Ϫ 37 > Ϫ62 –NUMBERS AND O...

Ngày tải lên: 07/08/2014, 22:20

... values of the numbers: |Ϫ12| Ϫ |7| ϭ 12 Ϫ 7 ϭ 5 Then apply the sign of the larger number: Ϫ12. The answer is Ϫ5. –NUMBERS AND OPERATIONS REVIEW 54  Sets Sets are collections of certain numbers. ... 0.04 > 0.004. This answer choice is FALSE. Answer choice b:0. 170 > 0.0 17 because 170 > 17. Therefore, 0. 17 > 0.0 17. This answer choice is FALSE. Answer choice c:0.83 > 0...

Ngày tải lên: 07/08/2014, 22:20

... three numbers in the set. If X > 17, the median is 17 because the numbers would be ordered: X, 17, 17. If X < 17, the median is still 17 because the numbers would be ordered: 17, 17, X. ... 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 se...

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, ... GPA –NUMBERS AND OPERATIONS REVIEW 65 Practice Question Which of the following shows the correct solution to the problem above? a. b. c. d. e. Answer e.  43 71  +  62 52  =  4...

Ngày tải lên: 07/08/2014, 22:20

... solution for 7x Ϫ 11 ϭ 29 Ϫ 3x is x ϭ 4. To check that the solution is correct, substitute 4 for x in the equation: 7x Ϫ 11 ϭ 29 Ϫ 3x 7( 4) Ϫ 11 ϭ 29 Ϫ 3(4) 28 Ϫ 11 ϭ 29 Ϫ 12 17 ϭ 17 This equation ... correct answer. 6 69 Example 7x Ϫ 11 ϭ 29 Ϫ 3x Move the variables to one side. 7x Ϫ 11 ϩ 3x ϭ 29 Ϫ 3x ϩ 3x Perform the same operation on both sides. 10x Ϫ 11 ϭ 29 Now move the numbers to t...

Ngày tải lên: 07/08/2014, 22:20

... 3y ϭ 7 Ϫ (x Ϫ 6y ϭϪ5) (x Ϫ x) ϩ (Ϫ 3y ϩ 6y) ϭ 7 Ϫ (Ϫ5) 3y ϭ 12 y ϭ 4 is the answer. Now substitute 4 for y in one of the original equations and solve for x. x Ϫ 7 ϭ 3y x Ϫ 7 ϭ 3(4) x Ϫ 7 ϭ 12 x ... for x. x Ϫ 7 ϭ 3y x Ϫ 7 ϭ 3(4) x Ϫ 7 ϭ 12 x Ϫ 7 ϩ 7 ϭ 12 ϩ 7 x ϭ 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...

Ngày tải lên: 07/08/2014, 22:20