Monday, November 30th

posted by Justyna

Topic: Comparing Prices Using Unit Prices

Today, we looked at page 237 in your text book, and looked over example two.

We were assigned page 239 numbers one and two

Tip: When calculating price per unit, it is ALWAYS ---> cost over quantity

Example: Milk was being sold at these sizes --> $3.98 for 4L Milk; $2.69 for 2L Milk; $1.65 for

1L Milk

Question: Which would be the best deal?

Solution: Remember, cost over quantity! First deal: 3.98/4 = .995 per litre

Second deal: 2.69/2 = 1.345 per litre

Third Deal: 1.65/1 = 1.65 per litre

* / means to divide *

This shows that the first deal of $3.98 for 4L would be the best because it is the cheapest per litre of milk.

November 26th

Today we learned about foreign exchange rates. We were assigned page 240, questions 7,8,9,10,11. The assignment was due for homework next class.

Example 1 1 Kroner= $ 0.19 Can

6000 Kroner = 6000 x Can $0.19

6000 Kroner = Can $1140

tuesday novemeber 24

today we worked on taxable income so you can figure out how to get your total income for your pay check. And our home work for the day was on pg. 233 questions 1,2,3,8,9,10

Tut. 5.2

Tut. 5.2 starts on page 228.
CPP- Canadian Pension Plan
EI- Employment Insurance
Taxable income- the taxable income= the gross pay-rrsp-union dues-rpp










Use the purple table on page 231 for estimating and use the tables that were handed out for calculating
The assignment is number 5 on page 233

November 19, 2009 Tutorial 5.1

Page 222

Investigation 1:
slope= (0-240)/(0-40) = -240/-40 = $6
(240-420)/(40-60) = -180/-20 = $9
5. employee worked 70 hours/week
(40)(6)=240 (30)(9)=270
270+240=$510/week

Gross earnings: pay before deductions

Example 1:
(40)(7.50)=$300 (6)(7.50)(1.5)=$67.50
300+67.50= $367.50
Example 2:
Dale's sales = $21 675
($10000)(.09)=$900
21675-10000=($11675)(.12)=1401
1401+900= $2301
Example 3:
(7.25)(160)=1160
figuring out earnings - (3000)(.04)=120+800=920
1160=800+x
360=x-commission
360/x = 4/100
360/4%=9000

Different types of salary:
- wage
- graduated commission
- commission
- piecework

Assignment: page 226 #1, 2, 6, 9


Amanda Schwartz

Fri,Nov,13/09

Systems Of Equations: We reveiewed these.
-have 2 equations and 2 variables
-points of intersection
-parallel lines=no solution
-could overlap=infinate # of solutions
-to solve them; graph, substitution, or adding/subtraction

We were shown Tut 3.5 on page 149 of the text
Steps to Solve reduce system to 1 variable
Solve the equation
substitute and solve for other variable

ex 1 x=her speed y=river speed
Equations x+y=10
x-y=6
Solve (2x=16) /2

Find Other Equation x+y=10
8+y=10
y=2

x=8 y=2 Final Answer (8,2) Her speed =8km and river speed =2km.

We were given an assignment on page 153 #1ac,2b, 3, 4, & 7

Solving Systems by Addition or Subtraction

On Tuesday in class, we went over how to solve a system of equations either by addition or subtraction. We watched a video on youtube that explained all the steps to follow, and we wrote them down on paper with an example. http://www.youtube.com/watch?v=ej25myhYcSg, this is the link to the video we watched. We were assigned the four equations on the back to do for homework.

Steps:
1) Eliminate a variable by doing addition/subtraction.
2) Add the coefficients together
3) Once you eliminate one variable, solve for the other variable.
4) Substitute into the equation of your choice.
5) Solve!!

Example:
2x+3y=4
+(-2x+7y=16)
0x +10y=20
/10y /10
y=2

2x+3(2)=4
2x+6=4
-6 -6
2x=-2
x= -1


Answer: -1,2

solving by addition

Here is the YouTube video we watched in class
http://www.youtube.com/watch?v=ej25myhYcSg

tut 3-4

On Monday we learned more about using WinPlot to find a linear equation. We learned that when there is an intersect it means the slopes are different and there will be one solution. If the lines run parallel to each other it means that there is no solution and the slopes are the same with different y intercepts. We also learned that when the equations are multiplied, added, or subtracted, the equation stays the same. To find a solution without solving, change the x and y values to 1. If it comes out to 1=1 it is the solution. If the point on one line is different than the other it is not the solution.

tut 3-4

On Friday we learned how to use WinPlot to find linear equations. We started with a line over line equation. This means that the slope and same intercept. It has an infinite number of solutions and infinite number of points.

Question #10

Deanna
Darryl


a) d=distance
t=time in minutes

Speed(m/min) Time(min) Distance
Start 170 m/min t+3 d
Finish 120 m/min t d
d=v times t

d=170(t+3) d=120(t)

b) x= -10.2 y= -1224 How long it takes Duane to catch up to Homer? 10.2 min to catch up.

c)How far along the course will they meet? 1224m into the course they meet.

Question # 12 Brett and Garrett

x= pop
y= candy

4x=y
.48x + .45y = 11.40
.48x + .45(4x) = 11.40
.48x + 1.8x = 11.40
2.28x = 11.40
/ 2.28 /2.28

x=5

4(5)=y
20=y

Questain #7 By Brad and Joel

Question 8 Trevor & Tom

A. x=4 Hours
B. y=7

student projects Question 13

13. 12 words= 13.50
25 words= 23.25 x 12 words-10=2 13.50
Flat rate= x y 25words-10=15 23.25
Set rate= y

2x+y=13.50 15x+13.50-2x=23.25
y=-2x+13.50 12x=9.75
y=-2(.75)+13.50 12x/12 = 9.75/12
y= 12 x=.75

Chance Hulley Amanda Schwartz

math quastion #5 ryan&wyatt

a)
Plan#1- $60
Plan #2- .25x+200=50+20=$70
Plan #1 is a better deal.

b)
y=60 x=.25x+20
60=.25x+20
40=.25x
40/.25=.25x/.25
x=160
You can drive 160km for each plan to cost the same.

Rental cost is $60

tut 3.3 solving linear systems by subsitution #4

#4
solution
d=distance
X=hours
d=-840x+5430
d=90
90=-840x+5430
840x=-90+5430
840x/840=5340/840
x=6.36 hours
the / equals a division sign

BY: TREVOR AND COLTON

Tut- 3-3

Today in applied math calss, we did an examples on page 132. There are two steps you have to fallow 1. Isolate 2. Substitute.

We did a few more simple algebra questions and were assigned Page 136 #2 a,c,e and #3 a,c,e

November 2nd

Today we went over Tut 3-2 in class. We were assigned page 129 1-11. We could pick 5 of them to solve. If it wasnt finished in class it was due for homework.

Friday, October 30 tut 3-2

On Friday we did a work sheet on writing equations and formulas. The worksheet was due for homework on Monday.