Number operation review 5 ppsx

... a. b. c. d. e. Answer e.  43 71  +  62 52  =  4 + 63+ 2 7 + 51 + 2  =  10 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 ... GPA –NUMBERS AND OPERATIONS REVIEW 65 Practice Question Which of the following shows the correct solution to the problem above? a. b....

Ngày tải lên: 07/08/2014, 22:20

... 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 definitely yield even numbers; ... root. 25 ᎏ 1 2 ᎏ ϭ ͙ 25 1 ෆ ϭ ͙ 25 ෆ ϭ 5 The numerator is 1, so raise 25 to a power of 1. The denominator is 2, so take the square root. 8 ᎏ 1 3 ᎏ ϭ ͙ 3 8 1 ෆ ϭ ͙ 3 8 ෆ ϭ 2 –N...

Ngày tải lên: 07/08/2014, 22:20

... 3| ϭ | 5| ϭ 5 Answer choice b: |12 Ϫ 7| ϭ |5| ϭ 5 Answer choice c:|(Ϫ20) Ϫ (Ϫ 25) | ϭ |(Ϫ20) ϩ 25| ϭ |5| ϭ 5 Answer choice d:|( 5) Ϫ 10| ϭ |Ϫ 15| ϭ 15 Answer choice e:|(Ϫ2) Ϫ 3| ϭ | 5| ϭ 5 Therefore, ... equation NOT true. –NUMBERS AND OPERATIONS REVIEW 53 Examples Multiples of 10 include 10, 20, 30, 40, 50 , 60, 70, 80, 90 . . . Multiples of 15 include 15, 30, 45, 60, 75, 90, 1...

Ngày tải lên: 07/08/2014, 22:20

... denominators: ᎏ a b ᎏ ϫ ᎏ d c ᎏ ϭ ᎏ b a ϫ ϫ d c ᎏ ᎏ 5 8 ᎏ ϫ ᎏ 3 7 ᎏ ϭ ᎏ 5 8 ϫ ϫ 3 7 ᎏ ϭ ᎏ 1 5 5 6 ᎏ ᎏ 3 4 ᎏ ϫ ᎏ 5 6 ᎏ ϭ ᎏ 3 4 ϫ ϫ 5 6 ᎏ ϭ ᎏ 1 2 5 4 ᎏ –NUMBERS AND OPERATIONS REVIEW 56  Rules for Working with Positive ... positive. Examples negative ϫ positive ϭ negative Ϫ3 ϫ 5 ϭϪ 15 positive Ϭ positive ϭ positive 15 Ϭ 5 ϭ 3 negative ϫ negative ϭ positive Ϫ3 ϫ 5 ϭ 15 ne...

Ngày tải lên: 07/08/2014, 22:20

... mixed number. 50 0% ϭ 5 2 75% ϭ 2. 75 or 2 ᎏ 3 4 ᎏ Here are some conversions you should be familiar with: –NUMBERS AND OPERATIONS REVIEW 62 FRACTION DECIMAL PERCENTAGE ᎏ 1 2 ᎏ 0 .5 50% ᎏ 1 4 ᎏ 0. 25 ... 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...

Ngày tải lên: 07/08/2014, 22:20

... 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 ϭ 50 x ϭ 2 Cross Products You ... a number, a variable, or a product of a number and one or more variables. 6 y Ϫ5xy 2 19a 6 b 4  Polynomials A polynomial is a monomial or the sum or difference of two or more monomia...

Ngày tải lên: 07/08/2014, 22:20

... d b. 6a Ϫ 5c Ϫ b Ϫ d c. (6a Ϫ 5c)(b ϩ d) d. ᎏ 6a Ϫ b d Ϫ 5c ᎏ e. ᎏ 6 b a ϩ Ϫ d 5c ᎏ Answer e. Use factoring to isolate x: bx ϩ 5c ϭ 6a Ϫ dx First isolate the x terms on the same side. bx ϩ 5c ϩ dx ... 6a Ϫ dx ϩ dx bx ϩ 5c ϩ dx ϭ 6a bx ϩ 5c ϩ dx Ϫ 5c ϭ 6a Ϫ 5c Finish isolating the x terms on the same side. bx ϩ dx ϭ 6a Ϫ 5c Now factor out the common x term. x(b ϩ d) ϭ 6a Ϫ 5c Now divide to iso...

Ngày tải lên: 07/08/2014, 22:20

... 3. x y 123 456 1 2 3 4 5 –1 –2 –6 5 –4 –3 –1–2–3–4 5 6 x y 123 456 7 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 8 and 5: The ... fraction with 40 as the denominator: ᎏ 5 8 x ᎏ Ϫ ᎏ 2 5 x ᎏ ϭ (5x ϫ ᎏ 5 8 ᎏ ϫ 5) Ϫ ᎏ ( ( 2 5 x ϫ ϫ 8 8 ) ) ᎏ ϭ ᎏ 2 4 5 0 x ᎏ Ϫ ᎏ 1 4 6 0 x ᎏ Then simplify: ᎏ 2 4 5 0 x ᎏ...

Ngày tải lên: 07/08/2014, 22:20

... radical sign. Example 5 c ෆ ϩ 15 ϭ 35 To isolate the variable, subtract 15 from both sides: 5 c ෆ ϩ 15 Ϫ 15 ϭ 35 Ϫ 15 5͙c ෆ ϭ 20 Next, divide both sides by 5: ᎏ 5 ͙ 5 c ෆ ᎏ ϭ ᎏ 2 5 0 ᎏ ͙c ෆ ϭ 4 Last, ... 16) (x + 8)(x 2 + 11x Ϫ 26) ᎏᎏᎏ (x 2 + 6x Ϫ 16) (x + 5) (x + 7)(x Ϫ 2) ᎏᎏᎏ (x + 5) (x Ϫ 2) (x + 5) (x 2 + 5x Ϫ 14) ᎏᎏᎏ (x 2 + 3x Ϫ 10) –ALGEBRA REVIEW 85 Practice Ques...

Ngày tải lên: 07/08/2014, 22:20

... expressions equaling different numbers. Therefore, we must choose the value of d that would make 15x ϩ dy identical to 15x ϩ 9 y.Ifd ϭ 9, then: 15x ϩ 9y ϭ 12 15x ϩ 9y ϭ 21 Thus, if d ϭ 9, there ... same. If we multiply 5x ϩ 3y ϭ 4 by 3, we get 15x ϩ 9y ϭ 12. Now we can com- pare the two equations because the coefficients of the x variables are the same: 15x ϩ 9y ϭ 12 15x ϩ dy ϭ 21 The only ......

Ngày tải lên: 07/08/2014, 22:20