Classwork/Homework - Last Week (2/9-2/13)

Hello everyone! I just wanted to tell you what a great experience I had teaching all of you. Although some of you struggled with some of the concepts we are working on, it was great to see you persevere and find success through deconstructing problems and practicing some advanced algebra.  

I hope you continue to work hard and be successful the remainder of the school year. I know you will have a great teacher for the rest of it. Welcome back Mr. Mejia!

In case any of you are looking at Veracross for work you may owe from our last week together it's all listed below. This list includes related blogs with video lessons for certain problems as well as links to worksheets that are not in the textbook.

Classwork/Homework - Last Week (2/9-2/13)

Monday (2/9)

Homework Due - none

Blog - 7.6 Word Problems w Systems of Linear Equations involving Rates

Classwork - 7.6 Rate Problems 1 - #2 & #3 are on the blog

Homework - pg 416 #s 18, 19, 22

Tuesday (2/10)

Homework Due - pg 416 #s 18, 19, 22

Blog - 7.6 More Rate Problems

Classwork - 7.6 Rate Problems 2 (includes #s 18, 19, 22 from HW)

kayak problem (back page) is done on the blog

Homework - pg 415-17 #s 17, 21, 24

Wednesday (2/11)

Homework Due - pg 415-17 #s 17, 21, 24

Blog - 7.6 More Rate Problems Practice & Start of Mixtures (7.7)

Classwork - 7.6 Rate Problems 3 -  #1 done on the blog

Homework - 7.6 Rate Problems 4 AND pg 421 #s 25 & 26

- #1, #2 & #3 are done on the blog

Thursday (2/12)

Homework Due - 7.6 Rate Problems 4 AND pg 421 #s 25 & 26

Blog - 7.7 Mixtures 1

Classwork - 7.7 Mixture Problems 1 - #1, #3 & #5 are done on the blog

Homework - 7.7 Mixture Problems 2

- #1 is solved two ways, one the Teaching Channel & the other on the blog

Friday (2/13)

Homework Due- 7.7 Mixture Problems 2

Blog - none

Classwork - 7.7 Mixture Problems 3 - WP - Homeroom 8Demetrus

7.7 Mixture Problems 3 - WP - Homeroom 8Atkinson

Homework - none

7.7 Mixtures 1

Hello Everyone,

My apologies for being out today.  I have a sick kid at home to take care of.  I hope the Patriotic Assembly went well.

I am not sure who will be with you in Algebra Concepts today so I will put all your work on the blog including links to the worksheets.

First start for classwork:

7.7 Word Problem Worksheet - Mixtures 1

This worksheet is a review of some of what you started last night for homework.  If you need any help please see the video solutions below:  

• 7.7 - Mixtures 1 - #1
• 7.7 - Mixtures 1 - #3 (w error)  then #3 (caught the error)
• 7.7 - Mixtures 1 - #5

You might also want to attempt the problems and then watch me solving them to correct your answers.

Next do for homework:

7.7 Word Problem Worksheet - Mixtures 2

Watch the video about mixtures at the Teaching Channel.  Use the teacher's example to write notes for the first saline solution problem.

Then watch the video of me solving the same problem.  Copy down what I did for notes.  Write a response on the back of your worksheet explaining which method works better for you and why.

Complete the second saline solution problem using either method.

7.6 More Rate Problems Practice & Start of Mixtures (7.7)

As you come in today, please start with your classwork:

CW: 7.6 Word Problem Practice - Rates 3

Please attempt the rate problems on this worksheet.  Hopefully you are getting more familiar with setting up rate problems.  If not, please watch this video of me solving #1.

 Once you have finished the classwork, you can start on your homework:

HW: 7.6 Word Problem Practice - Rates 4b and pg 421 #s 25 & 26

Please attempt #1 and #2 on your own.  Both have to do with rates of speed affected by waves or wind.  These are similar to your homework from last night.  However #2 has an interesting twist which will require you to go back to the work we did with:

DISTANCE = RATE x TIME

Please watch these videos of me solving #1 and #2 if you need help.

Once you have completed these you can attempt #3, a mixture problem.  For support you can choose to watch a video of me solving #3 or look in your textbook on pg 418.

7.6 More Rate Problems

Today we will review last night's homework problems.  As you can see the level of difficulty is ratcheting up but you are ready for it (even if you don't believe that yet).  I've listed how things are getting more challenging and the tools you have to meet the challenge:

• the problems require more translating from English into algebraic terms
1. use grids to break down the word problems
2. list information
3. rewrite tasks or questions
4. use the info and question to determine what answer you are seeking
5. label the answer with variables
6. go back and use the information to do the work and create linear equations that will help you solve for the variables

• the calculations are starting to involve more decimals or fractions. This is all the pre-algebra rational number work that can get tricky:
• with fractions you can multiply through BOTH sides of the equations to change fractions to whole numbers
• maintain your number sense while you do your fraction or decimal work 
• i.e. 1.9 X 1.2 approximates to 2 X 1 
• so when you get the answer of 228 you should know that you can place the decimal between the 2s
• the answer would be 2.28
• use a calculator to check your answers

After we are finished reviewing, you can start the next concept related to rates which focuses more on currents.  Please watch me solving the first part of the Rate w. Currents problem on the back of your classwork page.  Be sure you take notes and turn it in for full credit.

Then you can begin your homework:

HW: pg 415-17 #s 17, 21, 24

7.6 Word Problems w Systems of Linear Equations involving Rates

We've done some practice of translating word problems from the English language into Algebra language over the past few weeks.  Recently I challenged you to translate the guacamole and salsa word problem from pg 403 in our textbook.  Working on translating will help you as we move into word problems with rates.

Please watch the video of me solving #2 of your classwork page.  Watch it a second time and take notes on your classwork page.  Then write equations for #1 and solve using elimination, substitution or graphing.  

IF YOU NEED HELP WITH ANY OF THE CLASSWORK AND THE VIDEO IS NOT WORKING FOR YOU PLEASE LET ME KNOW.

After that please watch me solving #3(a) of your classwork.  Watch it a second time and take notes.  Then solve 3b on your own.  

Once you have completed the classwork page (including copying notes), please bring it to me and you can start your homework for tonight:

HW pg 416 #s 18, 19, 22 (show grids, equations & solve for all including 18)

7.2 to 7.4 Quiz Tomorrow

Just reminding you that we have a quiz tomorrow.  You will need to show that you can solve problems algebraically in the following ways:

1. graphing the equations for the common solution
2. using substitution to solve the system of equations
3. using elimination (starting by multiplying) to solve the system of equations

Please be sure to do the Practice Quiz - Homework.  I am attaching videos below of the solutions for those problems.  My suggestion would be to watch the video after you attempt the homework, similarly to how we reviewed the Practice Quiz - Classwork in class today.

HW: 7.2, 7.3, 7.4 Quiz - Practice Quiz Homework

Videos of Solutions to Practice Quiz - Homework

1. solving systems of equations by graphing
2. solving systems of equations by substitution
3. solving systems of equations by elimination

If you still have questions, please feel free to email me:

jadams@a-cs.org

See you tomorrow!

7.4 Solve Word Problems with Systems of Linear Equations by Multiplying & Eliminating

Since most people do not get paid simply for solving systems of linear equations, we will now practice the algebraic work we have done multiplying and eliminating with word problems.

Accordingly we will use grids to help us disaggregate the data we find in the word problems, translate the words into algebraic equations and then solve using appropriate steps to eliminate variables.

Start by practicing elimination with multiplication:

HW: pg 402 #s 20, 21, 22

Then, follow my lead by taking notes while you watch me solve #33 of your HW.

HW: pg 402-3 #s 33*, 34, 35, 39** (grid, equations & solve by elimination) 

**For number 39, be sure to graph your answer as well.