3.7B HW Answers

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

7.5

5

20

12

12,000

30

decrease45decrease33%

300 B

11.

12.

13.

14.

15.

16.

17.

18.

19.

C

x = -12

x = 0

p = 5

-30

-6

9, -9

-17

15

20. reciprocalassociativedividenddivisorquotientdistributemultiplicative identityfactorproduct

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

Daily Check• Only grade one per group

• No talking to other groups

• No copying!

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?

2. On a test of 80 items, a student got 60 correct. What percent were correct?

3. You have filled 15% of a 30-gallon aquarium with water. How much water have you put into the aquarium?

4. Find the discount price of a tent with a price of $80 and a discount of 15%

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?

A. 12,750 B. 80,000C. 72,250 D. 97,750

Resource Managers• Put the teams homework and daily

checks in the folder on the right side

• Turn folders in

Table of ContentsTopic Page #...3.5/3.6 Ratios and Proportions 413.7 Percents 433.7B Solve Percent Problems 454.1 Plot Points 47

#47

4.1 Plot Points

Coordinate Plane:Where two number lines cross

-5 -4 -3 -2 -1 0 1 2 3 4 5

543210-1-2-3-4-5

X-axis:The # line that is horizontal and represents all x #s

Y-axis:The # line that is vertical and represents all y #s

-5 -4 -3 -2 -1 0 1 2 3 4 5

543210-1-2-3-4-5

x

y

Quadrants:The 4 regions of the coordinate plane, named counter-clockwise

-5 -4 -3 -2 -1 0 1 2 3 4 5

543210-1-2-3-4-5

x

y

Quadrant IQuadrant II

Quadrant III Quadrant IV

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

-5 -4 -3 -2 -1 0 1 2 3 4 5

543210-1-2-3-4-5

x

y

Quadrant IQuadrant II

Quadrant III Quadrant IV

(3, 2)

(-4, 5)

(-5, -2)(1, -3)

(-3, 0) (0, 2)

Origin:Where the two axis meet

(0, 0)

-5 -4 -3 -2 -1 0 1 2 3 4 5

543210-1-2-3-4-5

x

y

Quadrant IQuadrant II

Quadrant III Quadrant IV

(3, 2)

(-4, 5)

(-5, -2)(1, -3)

(-3, 0) (2, 0)

origin

Ex: Graph y = 2x – 1 with the domain of -1, 0, 1, 2, and 3

x y = 2x – 1 y (x,y)-10123

y = 2(-1) – 1 -3y = 2(0) – 1 -1y = 2(1) – 1 1y = 2(2) – 1 3y = 2(3) – 1 5

(-1, -3)(0, -1)(1, 1)(2, 3)(3, 5)

-5 -4 -3 -2 -1 0 1 2 3 4 5

543210-1-2-3-4-5

x

y

Ex: Graph y = x2 – 1 with the domain of –2, -1, 0, 1, 2

x y = x2 – 1 y (x,y)-2-1012

y = (-2)2 – 1 3y = (-1)2 – 1 0y = (0)2 – 1 -1y = (1)2 – 1 0y = (2)2 – 1 3

(-2, 3)(-1, 0)(0, -1)(1, 0)(2, 3)

-5 -4 -3 -2 -1 0 1 2 3 4 5

543210-1-2-3-4-5

x

y