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All the Reviews!!!!!!!!!! TSW10 AL13 By: Sung Min Go&Lucy Konopkova TSW 9 REVIEW TSW1-5 By Lucy and Sungmin TSW1 • The selling price of a certain video is 7$ more than the price the store paid. If th e selling price is 24$, find the price the store paid ANSWER: 17$ TSW2 • If you ate 3 of the 8 pizza slices and you paid 3.30$ as your share of the c ost, how much did the whole pizza co st? ANSWER: 8.80$ TSW3 • The sum of 3 numbers is 123. The se cond number is 9 less than 2* the firs t number. The third number is 6 more than 3* the first number ANSWER: 21, 33, 69 TSW4 • Computer center charges nonmember s $5 per session. If you’re a member which you have to pay $25 for memb ership, it is 3$ per session. Write an e quation showing what would be bette r for you. ANSWER: It is worth to become a member if you expect to attend 13 or more sessions. TSW5 • Rectangular package length and girth=108in l=36in w=? 4x+36=108 x=18in Practice TSW 6 45 students are taking Japanese. Increase 3students per yr. 108 students are taking German. Decrease 4 students per yr. When will the number of students taking Japanese equal to number taking German? Solution Number of students + taking Japanese. 45+3a=108-4a 45-108=-4a-3a -63=-7a 7a=63 a=9. Number of yrs Number of times number students = of increase taking students per yr German Number of yrs times number of decrease students per yr. Algebraic. Practice TSW 7 You are shopping for earrings. The sales tax is 6%. You have a total of $19.11to spend. What’s your limit for the earrings? x+0.06x=19.11 1.06x=19.11 another way 19.11 x 0.94=17.963 x=19.11/1.06 x=18.028301…...round Round x=$18 $18. $18. Book’s way Another way Which I thin k is correct Practice TSW 8 I=prt. Find the interest rate ‘r’ for an investment of $1500 ‘I’ that earned $54 ‘p’ in simple interest in a yr ‘t’. I=prt r=? r=I/pt 54/1500 x 1 =54/1500 =0.036 or 3.6% Practice TSW 9 Solve the equation. (-a+2)^2 = 11 a^2 -4a + 4 =11 a^2- 4a =11 – 4 a^2- 4a = 7 -3a^2 = 7 a= root3/-7 (a+b)^2= a^2+2ab+b^2