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Math 60 ~ Work Sheet Sec. 1.3 & 1.4 3 1 1. Given x , y , w 2, z 8 simplify the expressions. 4 5 7 x 4y a) 4x 2 b) 2 z 1 z w 13 13 of the adult female population smoked and of the adult male 60 50 population smoked. What fraction of the adult population smoked in 2002? 2. In 2002 roughly 3. Find the area of the given rectangles. a) 2 6 b) 12 4 c) l w 4. Find an expression for the perimeter and area of the rectangle given. Make sure to simplify the expressions. a) The length is twice the sum of the width and 4. b) l 2 x2 1, w x 2 3 5. Use set-builder notation (or the roster method depending on appropriateness), interval notation and a number line to describe the following sets. a) The set of prime numbers greater than 4 and less than or equal to 23. Set-builder/roster method Interval Notation Number Line ___________________________________ b) The set of real numbers greater than or equal to -3.7 and less than 14.8. Set-builder/roster method Interval Notation Number Line ___________________________________ c) The set of real numbers less than -5. Set-builder/roster method Interval Notation Number Line ___________________________________ 6. Let the sets A, B, and C be defined as the following: A m, a, t , h, e, i, c, s , B h, i, s, t , o, r, y , and C l , i, t , e, r, a, u . a) Find B C _____________________________________ b) Find C A B __________________________________ 7. In a group of 190 college freshmen who had participated in athletics or music in high school, 120 had participated in athletics and 105 in music. How many had participated in both?