Warm-up Jan. 27 HW: Finish midterm review packet & study. Midterm is tomorrow! 1.2. What are the zeros of the polynomial defined by the function y = x.

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Warm-up Jan. 27 HW: Finish midterm review packet & study. Midterm is tomorrow! 1.2. What are the zeros of the polynomial defined by the function y = x 2 – 16x + 28? Page 113 Put your diaper project in the basket.

Math Poker Show me the Math Bets Total Earnings

T 4. One root of the equation 2x 2 = x x 2 – x – 15 = 0 (2x + 5)(x – 3) = 0 2x + 5 = 0 x = x =

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a 12. Justin’s part-time job pays him $155 a week. If he has already saved $375, what is the minimum number of weeks he needs to work in order to have enough money to buy a dirt bike for $900? 1) 8 2) 9 3) 3 4) 4 155x ≥ x ≥ x ≥ 4.03

i 6x 3 – 2x 2 – 4x 2x(3x 2 – x – 2) 2x(3x + 2)(x – 1)

r xy

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h 3(2x) + 5 = 7x – 2 6x + 5 = 7x – 2 -6x -6x 5 = x – = x

a 21. The solution set of the equation |2x – 1| + 4 = |2x – 1| = 4 4 = -(2x – 1) 2x – 1 = 4 4 = -2x x = 5 3 = -2x

r (7x – 42)  (4x + 21)  27. In the diagram on the right, line l and line m are parallel. Solve for x. What is the measure of the angle represented by 7x – 42? 4x + 21 = 7x – 42 -4x 21 = 3x – = 3x = x 7(21) – –

e 28. Find two consecutive negative integers such that the product is 42. Let 1 st CNI = x 2 nd CNI = x + 1 x(x + 1) = 42 x 2 + x = x 2 + x – 42 = 0 (x + 7)(x – 6) = 0 x = -7 x = 6 reject = -7 = -6

TeamTeam 33. J.Crew is having their winter sale on all items in the store. The winter sale is 35% off the original price. If a customer has a J.Crew credit card, then they get an additional 10% off the sale price. A lambswool cable crewneck sweater sells for $98.00, how much will a J.Crew cardholder customer saved over a regular customer? Include a sales tax of 8.625%. Discount = 0.35(98) = Sale price w/discount = Tax = (63.70) = 5.49 Total w/tax = $69.19 Additional 10% = 0.10(63.70) = 6.37 Sale price w/10% = additional w/tax = (57.33) = 4.94 Total = – = 6.92 A jcrew cardholder saves by $6.92

WorkWork 29. The larger of two positive integers is five more than twice the smaller integer. The product of the integers is 52. Find the larger integer. Let 1 st PI = x 2 nd PI = 2x + 5 x(2x + 5) = 52 2x 2 + 5x = x 2 + 5x – 52 = 0 (2x )(x ) = 0

Is 30. Ashley has $1.35 in nickels and dimes in her purse. In all there are 15 coins. How many coins of each kind are there? typeValue in cents amounttotal nickel5x= 5x dime1015 – x= 10(15 – x) 5x + 10(15 – x) = 135 5x – 10x = x = x = x = 3 Answer: 3 nickels 12 dimes

AwesomeAwesome 32. The cost of 3 markers and 2 pencils is $1.80. The cost of 4 markers and 6 pencils is $2.90. What is the cost of each item? Include appropriate units in your answer. Let x = $ marker y = $ pencil -3(3x + 2y) = 1.80  -9x – 6y = x + 6y = 2.90  4x + 6y = x = x = (0.5) + 6y = y = y = y = 0.15 = $0.50 = $0.15