Alg_Complete

The second topic that well be looking at is that of

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Unformatted text preview: or 2x - 3 > 7 2 x > 10 x>5 The interval notation for these are ( -¥, -2 ) or ( 5, ¥ ) . [Return to Problems] (b) 6t + 10 ³ 3 Let’s just plug into the formulas and go here, 6t + 10 £ -3 or 6t £ -13 or 13 t£or 6 13 ù æ The interval notation for these are ç -¥, - ú or 6û è 6t + 10 ³ 3 6t ³ -7 7 t³6 é7 ö ÷ ê- 6 , ¥ ø . ë [Return to Problems] (c) 2 - 6 y > 10 Again, not much to do here. 2 - 6 y < -10 - 6 y < -12 or or y>2 or 2 - 6 y > 10 - 6y > 8 4 y<3 Notice that we had to switch the direction of the inequalities when we divided by the negative æ è 4ö 3ø number! The interval notation for these solutions is ( 2, ¥ ) or ç -¥, - ÷ . [Return to Problems] © 2007 Paul Dawkins 149 http://tutorial.math.lamar.edu/terms.aspx College Algebra Okay, we next need to take a quick look at what happens if b is zero or negative. We’ll do these with a set of examples and let’s start with zero. Example 3 Solve each of the following. (a) 3 x + 2 < 0 [Sol...
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This note was uploaded on 06/06/2012 for the course ICT 4 taught by Professor Mrvinh during the Spring '12 term at Hanoi University of Technology.

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