Algebra 1 Common Core Student Edition, Grade 8-9

Ex e r c i se s 9. 7x 2 + 28x 11. 30m2 + 3m 3 13. 8 x 4 - 28x3 + 4x2 15.4 17.9 19.4 21. 3(3x-2) 7(2n 3 -5 n 2 + 4) 25. 2x(7x 2 ...

The solutions are the coordinates of the points on the line with equation 5x + 4y = 20. 6 x 2 - 11 x - 10 63. 24m2 - 34m + 7 5x ...

57a. (4 + 9n2)(2 + 3n)(2 - 3n) b. They are squares of square terms, c. Answers may vary. Sample: 16X4 - 1 59. H 61a. c = 190 - 2 ...

-108 14. 0 15. 49 16. 25 17. 24 18. 144 (2x + 1)2 20. (5x — 3)(x + 7) (4x - 3)(2x — 1) (x -9)2 23. (6y-5)(2y+3) (m - 9)(m + 2) ...

f(x) = x2, f(x) = - 3 x 2, f(x) = 5x2 f(x) = -§ x 2, f(x) = —2x2, f(x) = —4x2 -\- -i 20 / \ -tr V -8 / ......... 4 -19 ■« \/T ...

y X -l I— 0! L \ 1 \ /'I \ ) If a > 0, the graph opens upward and the vertex is a minimum. If a < 0, the graph opens do ...

Ex e r c i se s 7. —1.5, -1 9. - 3 , 1.25 11. - §, y -11, 4f 15. -2.6, 12 17. -2.56, 0.16 -0.47, 1.34 21. -2.26, 0.59 23. Quadr ...

Answers will vary. Sample: (0, 5), (2, 13), (4, 29), ( 6 , 53) 25a. E 60000 , 1 4000Q. O “■ 2000 0, linear o 8 12 16 Year b. T ...

4,V) 0 i C < "p <d 53 «o y \ (0,8) X= C X )- 0 11. x - 2 i y \ X O I\ 2 ST 7 Answers will vary. Sample: y = - x 2 14. A ...

3 VT2 ' . 3 Vn Vn Vn ' 3 VT2 12 ' V12 4 ' 2 V3 4 ' VI 2 A radical expression is in simplified form if the radicand has no perfe ...

No; there is no variable in the radicand. 5. The graph of y = Vx - 1 is the graph of y = Vx shifted to the right 1 unit. 6. Yes ...

y 0 X 61a. The graph is V-Shaped with vertex at (0, 5) and passing through (1, 6) and (-1, 6). b. y = |x| + 5 Lesson 10-6 pp. ...

Selected J \ values are not allowed. 22. A rational expression involves a ratio. 23. One is decreasing as the other increases. L ...

insert a term with a coefficient of 0 as a placeholder. Divide, multiply, subtract, bring down, and repeat as necessary. 7. - x ...

b. They are the same shape. They are reflections of each other over the y-axis. 4a. direct; y= -3 x b. inverse; xy = -48 5a. Dir ...

about 68.6 mi/h Lesson 11-7 Go t I t? 1. -7 x = 6 3a. x = - 3,y = -4 pp. 705-713 b. Yes; for example, y= \ and y = have the sa ...

23a. C = y + 100 0 2 4 6 8 10 b. 5 p e o p l e 25. translates the graph 1 unit to the left translates the graph 1 unit up 29. t ...

40a. 9 lumens b. Intensity is inversely related to the square of the distance, so at twice the distance the intensity is \ as gr ...

41. ViI C < J Tj -S? 't oto 2 500 400 Causal; the amount of sales is related to earnings. Lesson Check 10 20 30 40 50 Pro ...

Answers may vary. Sample: Ages of Relatives , 8 6 §■ 4 LL. 2 7L 0 £ f ^ £ <§ > < & Age Answers may vary. Sampl ...