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3.7B HW Answers
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1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 7.5 5 20 12 12,000 30 decrease 45 decrease 33% 300 B
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11. 12. 13. 14. 15. 16. 17. 18. 19. C x = -12 x = 0 p = 5 -30 -6 9, -9 -17 15
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20. reciprocal associative dividend divisor quotient distribute multiplicative identity factor product
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Scoring Your Homework Count how many problems you missed or didn’t do 0-1 missed = 10 2-3 missed = 9 4-5 missed = 8 6-8 missed = 7 9-10 missed = 6 11-13 missed = 5 14-15 missed = 4 16-17 missed = 3 18-19 missed = 2 20-22 missed = 1 23-27 missed = 0
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Daily Check Only grade one per group No talking to other groups No copying!
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1. You bought a sweater on sale for $15. The original price of the sweater was $40. What percent of the original price was the sales price?
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2. On a test of 80 items, a student got 60 correct. What percent were correct?
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3. You have filled 15% of a 30-gallon aquarium with water. How much water have you put into the aquarium?
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4. Find the discount price of a tent with a price of $80 and a discount of 15%
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5. A car salesperson had sales of $85,000 one week and a 15% decrease in sales the next week. What was the amount of sales the second week?
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Resource Managers Put the teams homework and daily checks in the folder on the right side Turn folders in
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Table of Contents Topic Page #... 3.5/3.6 Ratios and Proportions41 3.7 Percents43 3.7B Solve Percent Problems45 4.1 Plot Points47
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#47 4.1 Plot Points
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Coordinate Plane: Where two number lines cross
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-5 -4 -3 -2 -1 0 1 2 3 4 5 5 4 3 2 1 0 -2 -3 -4 -5
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X-axis: The # line that is horizontal and represents all x #s Y-axis: The # line that is vertical and represents all y #s
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-5 -4 -3 -2 -1 0 1 2 3 4 5 5 4 3 2 1 0 -2 -3 -4 -5 x y
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Quadrants: The 4 regions of the coordinate plane, named counter-clockwise
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-5 -4 -3 -2 -1 0 1 2 3 4 5 5 4 3 2 1 0 -2 -3 -4 -5 x y Quadrant I Quadrant II Quadrant III Quadrant IV
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Ordered Pair: First number is the x-coordinate and the second number is the y- coordinate. (x, y) x is domain, y is range First you walk, and then you fly
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-5 -4 -3 -2 -1 0 1 2 3 4 5 5 4 3 2 1 0 -2 -3 -4 -5 x y Quadrant I Quadrant II Quadrant III Quadrant IV (3, 2) (-4, 5) (-5, -2) (1, -3) (-3, 0) (0, 2)
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Origin: Where the two axis meet (0, 0)
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-5 -4 -3 -2 -1 0 1 2 3 4 5 5 4 3 2 1 0 -2 -3 -4 -5 x y Quadrant I Quadrant II Quadrant III Quadrant IV (3, 2) (-4, 5) (-5, -2) (1, -3) (-3, 0) (2, 0) origin
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Ex: Graph y = 2x – 1 with the domain of -1, 0, 1, 2, and 3 x y = 2x – 1 y(x,y) 0 1 2 3 y = 2(-1) – 1-3 y = 2(0) – 1 y = 2(1) – 11 y = 2(2) – 13 y = 2(3) – 15 (-1, -3) (0, -1) (1, 1) (2, 3) (3, 5)
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-5 -4 -3 -2 -1 0 1 2 3 4 5 5 4 3 2 1 0 -2 -3 -4 -5 x y
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Ex: Graph y = x 2 – 1 with the domain of –2, -1, 0, 1, 2 x y = x 2 – 1 y(x,y) -2 0 1 2 y = (-2) 2 – 13 y = (-1) 2 – 10 y = (0) 2 – 1 y = (1) 2 – 10 y = (2) 2 – 13 (-2, 3) (-1, 0) (0, -1) (1, 0) (2, 3)
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-5 -4 -3 -2 -1 0 1 2 3 4 5 5 4 3 2 1 0 -2 -3 -4 -5 x y
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