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Unformatted text preview: simplify 3x + 3 = 12x 4 isolate the variable 15x =  7 divide both sides by 15 x = 7/15 d. (x+2)  x =0x+2 = x^2 Again squaring both sides and making sure to check at the end for same reasons. x^2  x  2 = 0 Factoring (x2)(x+1) = 0 Check x =2 and x = 1 2 works, 1 does not. . Answer: x =2 2. 1.5x/100x a. 1.5*60/100600 90/40 2.25 Answer: 2.25 million b. 5=1.5x/(100x) (100x)5 =1.5x 5005x=1.5x 500=6.5x x=76.9 % Answer: 77% 3. a. x y1 1 2 0.414 3 0.732 4 1 b. Because the root of a negative number will be imaginary. c. 4. a. 100 ft b. 98 ft...
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This note was uploaded on 04/07/2011 for the course ECON 101 taught by Professor Sei during the Spring '11 term at American Academy of Art.
 Spring '11
 sei

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