Page 633 - Basic College Mathematics with Early Integers

610 C HAPTE R 8 I INTRODUCTION TO ALGEBRA

Find the area of each figure.

23. (2x 1) yards 24. 3y meters

3
yards Rectangle Square

#
(Hint: y y = y 2 )
(8.2)

25. Is 4 a solution of 512 - x2 =-10? 26. Is 0 a solution of 6y + 2 = 23 + 4y?

Solve.

7 3 4 2
27. z - 5 =-7 28. x + 1 = 8 29. x + = 30. y + =-
8 8 11 11

31. n + 18 = 10 - 1-22 32. 15 = 8x + 35 - 7x 33. m - 3.9 =-2.6 34. z - 4.6 =-2.2

(8.3) Solve.

35. -3y =-21 36. -8x = 72

37. -5n =-5 38. -3a = 15

2 8 7
39. x =- 40. - y = 21
3 15 8

41. -1.2x = 144 42. -0.8y =-10.4

43. -5x = 100 - 120 44. 18 - 30 =-4x

(8.4) Solve.

45. 3x - 4 = 11 46. 6y + 1 = 73

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5 2 2
47. - x + 23 =-12 48. - x - 11 = x - 55
9 3 3

49. 6.8 + 4y =-2.2 50. -9.6 + 5y =-3.1