Algebra 1 Common Core Student Edition, Grade 8-9

27a. f' ^ Co st o f M eal $15 $21 $24 $30 Money Left $37.75 $30.85 $27.40 $20.50 0 10 20 30 40 50 Co st o f M eal , c Lesson 4-6 ...

vertical line is not a function because the x-value has more than one y-value associated with it. 37.23 39.6 41.5.25 11 stamps ...

Snacks purchased, total cost; for each additional snack, o total cost goes up by 3; 2 C= 18 + 3s. | O linear Weight (lb), w co ...

11. X fix) 0 -4 Irsj 4 0 2 A(n) = 2 + (n — 1)3 13. A(n) = 13 + (n - 1)(-3) /A(n) = -3 + (n - 1)2.5 15. the steepness of the lin ...

\ 1 y \ \ X — 0 i-2 \ \ y = 6 x y 1 I -(^1 X ; / f 35a. 48 volts b. 0.75 ohm 37. No; as the rate increases, the time decreases ...

47a. y= 35x+ 50 b. c. The amount of time the repair takes and the cost must be positive. y/ / // X 0 ai = -1 , ar = a„_i + 4; y ...

&» I w> C <C 'p P -S? w x + 3y = 0 5a. x+15y = 60 b. domain: nonnegative integers less than or equal to 60; range: {0 ...

equal. 3. y=-^x + y 4. y=-|. Lesso n Ch eck 1. y = 6x and y = 6x 10 1 ' D2- y = ~ b x and y = 6x, y = - ^x and y = 6 x - 2 2. y ...

Answers may vary. Sample: Attendance at U.S. Them e Parks y = 5x - 9690; about 335 million 1996 2002 2008 Year y = 21 ,4x- 4 ...

42-43. Answers may vary. Samples are given. y = 0.25x + 5.05 43. y = 12.5x y -------^ i \ --------2- -\ -;i o Ch a ...

infinitely many solutions 29. infinitely many solutions J / i — (^2) 3/S; x -,l 3 L^2 31.13 h You should substitute the v ...

Sample: Solve the first equation, y + x = x, for y, so y = x - x = 0. But the second equation is not defined for y = 0; therefor ...

Ss/ectec/ j \ y X -> y < jx - 1 5. Answers will vary. Sample: The solutions of a linear equation and a linear inequal ...

downward. If the line had a positive slope, sloping upward, then the point ( 1 , 2 ) would be above the line and would satisfy y ...

and ( - 1 , - 1 ) and the other passing through ( - 1 , 1 ) a n d (1, - 1 ). Four triangles are formed by these lines; upper, le ...

3a. 343m 27 b. pp c. ^ 4a. 81y20 b. 81c16 c. 54°cJ 3 ^ 5. about 1.125 X 1010 joules of energy Lesso n Ch eck 1. n 18 2. ^ 3. 81a ...

I <4 c < (^3) o •4? I*<4 b 31 49. 53 should be 125. 51. Each factor should be raised to the fourth power and simplif ...

PowerAlgebra.com j S ele c te d A n s w e rs Sample answer: To multiply two radicals with the same radicand, first rewrite the ...

c. Answers may vary. Sample: The function values increase more rapidly. 51. 6 53. 3 55a. 4 b. 3 c. y = 4 • 3X d. §; 324 Lesson 7 ...

q,12r4 a3bi 42 37. 1.7956 38.243x3y1 16 39. 43. 7x4 44. ,21 45. 3r10z8 o20 x4 81c12 2 X 10“ 3 47. 2.5 X 102 48. 5 X 10“ 5 3 ...