5-28

5-27 Review

5-23 9 Weeks Test Review

Questions from 5-22

I will get this cleaned up later. Keep looking for each class's contribution.

A few more examples

Remember: Notes are now on Google Drive. Email me if you don't have access

Like number 3 from problem 3

Like number 4 from problem 3

Other places with help

Purple Math

Math Planet

Cool Math

Khan Academy 

More test re-take packet

Test Re-take Review

Shared Folders on Drive

I received emails from other teachers asking me not to post them here. They had flipped classrooms, where students were to complete the book work at home, then come to class ready to discuss and practice. Their students were copying our notes and turning them in as their work. To provide copies of in classwork, I am sharing the files on Google Drive through the school. I can only share these with in district email address so they are going to my student's school email. They should have their user name and password.

Study Guide FAQ

1st

What is the test like?

Check yesterday's post!

What are the page numbers that go with the questions?

1: Pg 601
2: Pg 617-619
3 and 4: All of 11.3 and 11.4

2nd

How can I find the slope from the equations?

Both equations are in slope-intercept form or y=mx+b. The slope is m (not x, you are not ready for slopes with variables) and the y-intercept is b.  Remember that we don't write it down when we add 0 or multiply a variable by 1 because of the identity properties.

How do you tell lines are perpendicular?

The slopes are opposite reciprocals, or as a student said "Totally flipped". They are flipped over and have different signs, like 2 and -1/2 or -8/5 and 5/8. More detail here.

3rd

I still don't get how to find the slope from an equation.

Think back to or look back at chapter 3. We learned about the y-intercept form of an equation and slope then. We found out that when an equation is written like y equals some number times x plus another number that the number that was multiplied by x was the same as the slope or rate of change. Look at your equation. What number was multiplied by x? That is the slope.

How do I graph these lines?

Either make a table and plot the points or use the slope and y-intercept.

4th

Can you show us one more substitution problem?

We did one in class and here's another really broken down. I got the problem from here. I think it was number 10.

I look at both equations and think, "Which one will be easier to solve for a variable?" I decided that the first one would be easier to solve for y because y is not being multiplied by anything.

I solve for y by adding 5x to both sided. I added because -5 and +5 are inverses which means they add up to 0. I want 0x with my y. I cannot really add the 5x and 3 to get anything that makes sense so I leave them a math problem.

Take the y out of the OTHER equation and put the math problem that is the same as y from the previous step in it's place. I wrote this in blue so you can see it. Then solve using the same old rules as always. (First, I made everything addition to be sure that I could rearrange as needed and keep the signs all correct. Then I used the distributive property to deal with my parenthesis. Then I combined like terms on the same side of the equals. Then I used inverse operations to get x all alone.)

Plug 0 in for x in the other equation because x=0. Solve for y.

Your solution is (0,-3)

Does slope have to be a fraction because of rise over run?

All number are kinda secretly fractions. 3 is the same as 3/1.

How do I know which equation to start with?

It doesn't really matter. I look for a variable that isn't being multiplied by anything so I won't get fractions. Here's the problem above to the first half of the solution done by solving the first equation for x. It was more difficult, but I get the same answer.

If I plug y=-3 in the other equation, I will get x=0.

6th


7th

Test Info

Test Friday. We will do two practice tests in class before it. Be sure to come to me with questions. If there's something you don't get and you don't tell me, I can't help you. 

1st and 2nd 

See yesterday's post for help with 11.4

3rd-7th

Finish your pre-test. We will check this in class tomorrow.

Pre-Test FAQ

What will the test be like?

2 Questions about Parallel or Perpendicular equations
One substitution word problem
One graphing word problem
2 graphing problems where you are given the equations
2 solving systems where you are given just the equations

How do I find the slope and y-intercept?

The equations you need to do this for are in slope-intercept form. 

11.4 Hints

How to get the equations

Number 1:

Relate the prices of the seats.
Relate how much they make for selling all the seats to how much they need to make.
You don't need the total number of seats.

Number 2:

How many points each kind of question is worth=total points
The test has 2 kind of questions for a total of 20 questions

Number 3:

One question is John's order, the other is Serena's order.

Number 4:

The first 2 pictures are equations. Solve them using substitution then figure out the third picture

How to substitute

Solve one of the equations for one variable. The side of this equations are the same, this is always true of equations and is called the Reflexive Property of Equality. Because this variable is the same thing as the other side of the equal sign, you can put the expression in place of the variable.

Turn the variable you solved for in equation 1 to empty parentheses in equation 2. Put the expression that is the same as the variable in those parentheses.

How to solve

The equation you get is just like many that we have solved this year, last year, and in middle school. You use the same old rules. The order of operations, the integer rules, the distributive property, inverse operations, and everything still apply.

I still don't get it

Here's the steps according to PurpleMath
Here's another example
And another

Story to Equations from PurpleMath

Systems again

Objective

Solve systems of equations by graphing

Agenda

Homework Quiz
Cellphone problem
Start Homework

Homework help/I'm lost

How do I graph the lines?  (or this one)

Khan's Graphing Systems

Systems Day 3

Objective

Solve Systems of Equations

Agenda

Homework Questions
Problem 2
Questions
Quiz (if time allows)

I am lost

Try out this video to see a different example. They do the same type of problem but the situation is different and they

Systems day 2

Objective

Solve systems of equations by graphing

Agenda

Talk about homework
Quiz (6th only)
Get a new chapter from the book
Start Problem 1 in 11.1

Homework

Finish Problem 1

I Can Do Systems of Equations

Objective

Start Systems of Equations

Agenda

Bellwork (Brainbox)
Classwork
Start Homework

Classwork

Homework

Worksheet

Benchmark FAQ

What is a scatterplot?

From: http://www.mathsisfun.com/data/scatter-xy-plots.html

How do I find GCF when there are letters?

Factor both numbers, treating the variables like prime numbers. List any numbers/variables that both share, then multiply those numbers. Your answer is your GCF.
A different explanation can be found here.

How do I do the views thing?

You are trying to draw the side the question is asking about like you are looking at that side and drawing what you see like it is flat. The activity here makes more sense than just talking about it.

What is f(x)? 

f(x) is a way of writing y that includes the number that you plug in for x.

f(x)=x+2    
f(3)=3+2                    
f(x)=5

What is a parabola?

The graph formed from an equation like y equals x squared. It is shaped like a u.              

How do I do percent change?

Find the change between the 2 amounts.

Plug this in as the part in the percent proportion.

Solve

What is the  ________________________ property?

Here's a link to the properties you should be familiar with. 

(43 askers) How are a square and a rectangle different? (40 askers) How is a square a rhombus?

Check out the definitions on MathIsFun.

Online Study Guide

Click here to do the online study guide. To get credit, you must log in to Sophia.org.

9 Weeks Test Study Guide

The 9 weeks test will consist of 20 multiple choice questions from Benchmark Released Items. All of the questions were part of the Brain Box assignment.

Instead of a paper study guide, we have an interactive one here.

Study Guide

Similar Figures

Using Similar Figures to Find Missing Sides

Unit Conversion

Percents

Conversions