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# Chapter 2 Study Guide 6557

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This 4 page Study Guide was uploaded by Maaike Gros on Monday September 12, 2016. The Study Guide belongs to 6557 at Fayetteville State University taught by Guanghua Zhao in Fall 2016. Since its upload, it has received 7 views. For similar materials see Intro to Algebra in Math at Fayetteville State University.

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Date Created: 09/12/16

Chapter 2 Review Questions: Simplify. 5x−x+2x 1. 1 7 2. x+3+ x−5 2 2 3. 3(w+2 − 12−w ) 4. Subtract 7x-2 from x+5 Write as an algebraic expression. 5. Twice the sum of a number and 2.8 added to 3 times a number Solve. 2 5 6. x+ x=6 7 7 7. 2x−6=x−6 8. 6(3+n)=5 n−1 ) Use the addition property to fill in the blank so that the middle equation simplifies to the last equation. 9. x−5=3 x−5+¿ ___ ¿3+¿ ___ x=8 Write as an algebraic equation. 10.The sum of two numbers is 10. If one number is x, express the other number in terms of x. 11.If one angle measures x ˚ , express the measure of its complement in terms of x. Solve. 3 x=−9 12. 4 13. −3 x+1=19 14. 7(x−1 +9=5x 15.Write the sum of three consecutive integers as an expression in x. Let x be the first integer. 5 2 16. x+4= x 3 3 17. −6 2x−5 =−3 9+4x ) .52n−3 −.1=.4 (5+4y ) 18. 5(c+1 ) 19. =−¿ n 6 20.The height of the Washington Monument is 50.5 inches more than 10 times the length of a side of its square base. If the sum of these two dimensions is 7327 inches, find the height of the Washington Monument. 21.The quotient of a number and 3 is the same as the difference of the number and two. Find the number. Substitute the given values into the given formals and solve for the unknown variable. 22. P=2l+2w;P=46,l=14 Solve. y=mx+b m 23. for C=2πr π 24. for 25.A swimming pool holds 900 cubic meters of water. If its length is 20 meters and its height is 3 meters, find its width. Find each of the following. 26.The number 9 is what percentage of 45? 27.The number 137.5 is 125% of what number? 28.The price of a small diamond ring was recently increased by 11%. If the ring originally cost $1900, find the mark-up and the new price of the ring. 29.Suppose that a cell-phone service has an estimated 4600 customers who use their cell phones while driving. How many of these customers would you expect to have cut someone off while driving and talking on their cell phones? 30.If a price decreases from $250 to $170, what is the percent increase? Solve. 31.A pay phone is holding its maximum number of 500 coins consisting of nickels, dimes, and quarters. The number of quarters is twice the number of dimes. If the value of al the coins is $88.00, how many nickels were in the pay phone? −3x>12 32. −3<4 x−1<2 33. 4(2x−5 )≤5x−1 34. 35.Tina earns $175 per week plus a 5% commission on all her sales. Find the minimum amount of sales to ensure that she warns at least $300 a week. Chapter 2 Review Answers: 1. 6x 2. 4 x−2 3. . 4. −6x+7 5. . 6. 6 7. 0 8. -23 9. 5;5 10. 10−x 11. (90−x )˚ 12.-12 13.-6 14.-1 3 x+3 15. 16.-4 17.No solution 18.20 23 19. 7 20.6665.5 inches 21.3 w=9 22. y−b 23. m= x C 24. π= D 25.15 meters 26.20% 27.110 28.Mark-up: $209; new price: $2109 29.966 customers 30.32% 31.80 nickels 32. −∞,−4 ) −1 , 33. ( 2 4 19 34. (−∞, 3 ] 35. $ 2500

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