Algebra: Form and Function by William G. McCallum, Eric Connally, Deborah Hughes-Hallett

By William G. McCallum, Eric Connally, Deborah Hughes-Hallett

This publication deals a clean method of algebra that specializes in instructing readers the right way to actually comprehend the rules, instead of viewing them purely as instruments for different kinds of arithmetic. It is dependent upon a storyline to shape the spine of the chapters and make the fabric extra enticing. Conceptual workout units are integrated to teach how the knowledge is utilized within the actual international. utilizing symbolic notation as a framework, company pros will come away with a significantly stronger ability set.

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Apago PDF Enhancer PROBLEMS 69. A company outsources the manufacturing of widgets to two companies, A and B, which supply a and b widgets respectively. However, 10% of a and 5% of b are defective widgets. What do the following expressions represent in practical terms? day. If c is the number of calories, g the grams of fat, and f the grams of dietary fiber, then the number of points for a piece of food is Number of points = c g f + − . 95b)/(a+b) How many grams of fiber can you trade for three grams of fat without changing the number of points?

52. 2a − 7 = 5a 65. The combined salary of Jason, J, and Steve, S. In Exercises 53–57, solve the equation. 53. 7r = 21 54. a + 7 = 21 66. Twice the combined salary of Jason, J, and Steve, S, is $140,000. 55. J/8 = 4 56. b − 15 = 25 67. 225 pounds is ten pounds more than Will’s weight, w. 57. 5 = 1 − d 68. 50 pounds less than triple Bob’s weight, w. Apago PDF Enhancer PROBLEMS 69. A company outsources the manufacturing of widgets to two companies, A and B, which supply a and b widgets respectively.

3 3 3 Example 5 Show that Solution Since dividing (−x + y) by −3 is the same as multiplying it by −1/3, we have −x + y 1 = − (−x + y) −3 3 1 = − · (−x + y) 3 1 1 = − · (−x) + − 3 3 1 1 = ·x− ·y 3 3 x y = − 3 3 ·y distributing −1/3 rewriting addition as subtraction rewriting multiplication as division. Apago PDF Enhancer Warning: You Cannot Distribute Every Operation The distributive law allows us to distribute multiplication over a sum. A common mistake is believing that the distributive law applies to all types of expressions that involve parentheses.

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