Ms. G is back from Quebec!

Today in class solved a few two-step algebra problems using the balance method.

We began correcting "Test Yourself" Algebra assignment that was due today.

HOMEWORK:
- Make sure you have your Data Management Online Scavenger Hunt printed and that your Data Management Package is finished.
- Do a rough draft of a poster for #3 on the last page of the Data Management Package

Instructions - Design a display foir the Cafeteria Bulletin board that you think would be effective in presenting this data AND encouraging people to reduce, reuse, recycle.  Use your data!!

Thursday Feb 16, 2012

Homework for the Family Day Weekend - Nothing. Please relax and get rested up.


Ms. Gesner will be in Quebec with the Grade 7s next week.
On Wed Feb 29th you will be expected to hand in:
1) The Data Management Online Scavenger Hunt
2) The Algebra "Test Yourself" activity.
3) The Data Management package

Wed Feb 15, 2012

HW - Mathpower p405 #1- 26 odd numbers only and #41, 42, 43
This is due tomorrow.

Data Management Online Scavenger Hunt - We're doing this next - Tuesday's homework is in next post

Use http://www.mathsisfun.com/definitions/index.html or any other online resources to answer the following questions.

1.  a. What is a CENSUS? 
b. What are 2 advantages and 2 disadvantages of doing a CENSUS?

2.  a. What is a REPRESENTATIVE SAMPLE? 
b. What does SAMPLE SIZE mean?

3.  a. What is a HISTOGRAM? Why are they used?
b. How are histogram different from Bar Graphs? 
c. What does an "interval" or "range" mean when we talk about histograms?
d. Cut and paste 2 or more histograms below.

4.  a. What is a SCATTER PLOT? Why are they used?
b. Cut and past two or more scatterplots that show a "positive correlation"
c. Cut and paste two or more scatterplots that show a "negative correlation"
d. Cut and paste two or more graphs that show no correlation.

5.a. When should you use a BAR GRAPH to show data?
b. When should you use a LINE GRAPH to show data?
c. When should you use a PIE GRAPH to show data?
d.  Cut and paste an image of each type of graph above.

CHALLENGE - 6.  BOX AND WHISKER PLOTS - What are they?  What do they show?  Copy 3 or more images.

Tues Feb 14th - Happy Valentine's Day

HW - Do 8.5 # 4,5,6,7 (sheet from today)
Finish "Writing Algebraic Expressions & Equations" (sheet from yesterday)

Mon Feb 13, 2012

Today we practiced going back and forth between English and Mathematical Symbols.

The sum of three consecutive numbers beginning with x
x + (x+1) + (x+2)

The average of 3, 5, 9, and a number z
(3 + 5 + 9 + z) / 4
(the slash represents division)

HW - p 399 # 7-23 Odd only
#25-33

For example #33
-1 =  t 
        3
Multiply each side by 3
-1 x 3 =  t x 3
               3
-3 = t
Check your answer - Is -1 = t/3?  Yes!
    

Thursday Feb 9. 2012

HW - Mathpower 8 p396 #7-10, #19-22, #25-32

The Balance Method

A way of solving algebraic equations by doing the same thing to both sides of the equation.

3x= 15

Divide both sides by 3

3x =15

3       3

x= 5

7y-3=18

Add 3 to both sides

7y-3+3=18+3

Divide both sides by 7

7y = 21

7       7

y =3

Algebra Vocabulary

Variable- Is a symbol for a number we don't know. It is usually a letter x or y.

Constant- A number on it's own.

Coefficient- A number used to multiply a variable. In 7x is a variable, 7 is the coefficient.

4 is coefficient.
x is variable.
7 and 5 is constants.

Term- either a single number or variable, or numbers and variables multiplied together.

"Like Terms"-Terms with the same variable and exponents x, 3x and 21x are like terms. 3q and q2 are not like terms.

"Gather like terms"- put all terms with the same variable together 6x, 2x, -1x . 7x.

Evaluate- substitute a # for the variables.

Feb 8, Day 8 - We return to ALGEBRA!

Today we learned about Algebra Vocabulary
(thanks to Maegan for typing it up!)

Variable-is a symbol for a number we don’t know. It is usually a letter x or y.

Constant - A number on its own

Coefficient- A number used to multiply a variable. In 7x  x is a variable, 7 is the coefficient

    4x - 7 = 5

4 is coefficient

X is the variable

7 and 5 is constants

Term-either a single number or variable, or numbers and variables multiplied together.

Expression- A group of terms separated by + and – signs 4x-7

Equation-Has an equal sign. Both sides have the same value.

Like Terms - Terms with the same variable and exponents x, 3x and 21x are like terms. 3q and q2 are not like terms.
Gather like terms- add all terms with the same variable together 6x, 2x, -1x . 7x.
Evaluate- substitute a # for the variables.



HW - Answer the following questions to hand in.  You don't need to copy the questions but please answer in COMPLETE SENTENCES.
1.  In the expression 3a + 2
a) What is the variable?
b) What is the constant?
c) What is the coefficient of a?

2. Are -5b and 12b like terms?  Why or why not?

3. a) Make up an expression using the variable d, a coefficient of 5 and a constant of 10.
b) Make up an expression that has a variable k, a coefficient that is an odd number, and a constant that is a perfect square.

4.  Evaluate the expression 3n + 1
Example: If n = 7  then 3n +1 would be 3 (7) + 1 which is 22.  
a) n = 2
b) n = 6
c) n = 10

Mon Feb 6, 2012

Test today.

HW - Prime Factor Review Sheet - #1a, #2, #3a,b, #4.

Thurs Feb 2, 2011

HW - Pink Sheet #16, 17, 19.  Test Monday.
Extra help (and chocolate) available afterschool Thurs and Friday.

Wed Feb 1, 2012

See homework from yesterday.