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