Winter 2021 Algebra

Winter 2021

Welcome to Semester 2

Poll

Would you rather live in virtual reality where you are all powerful or live in the real world and be able to go anywhere but not be able to interact with anyone or anything?

• virtual reality

• real life

Multiple Select

This semester we will use this site Quizizz, to learn new topics. Each class period we will do a quizizz together- you are expected to listen and answer the questions. If you are not answering questions or missing too many or not attending you will have to redo the quizizz. Why would you have to redo a quizizz

• Missing class

• Not answering

• Answering every question incorrectly

Multiple Select

I need you to participate, so this is the way. The quizizz will be posted after class for those that need to make it up and can be done whenever for partial credit. How can i get full credit for the quizizz lessons.

• Listening and participating to the quizizz in clas

• Finishing a quizizz outside of class

• Not answering

• Just clicking any answer

If you have any valid reason why you missed class let me know and i will give you full credit for completing a quizizz after class. Otherwise the assignment will be posted to make back any credit not earned.

Multiple Select

I will send out a checklist agenda every weekend with an update of what you assignments you have still due. I will accept late work, but you need to complete assignments for credit. Powerschool and google classroom will also show missing assignments. Where can you find information on missing assignments.

• Google Classroom

• Power School

• Email

Multiple Select

I will give credit to all those that are responding to the emails i send out. Extra credit if you provide a parents email to be included in the weekly email updates. How can you earn a little extra credit.

• By answering weekly check up emails

• OR By providing a parent or guardian email

Multiple Select

Your grade is based on completing quizizzes, completing assignments, and completing Google Form quizzes. What is included in your grade?

• Quizizz

• Kami Assignments

• Google Form quizzes

Multiple Select

Your grade is based on completing quizizzes, completing assignments, and completing Google Form quizzes and ALEKS. What is included in your grade?

• Quizizz

• Kami Assignments

• Google Form quizzes

• ALEKS

Today we are going to go over some key topics

• We will watch a video

• Then we will do some problems together

• Then i will go over the assignment

Multiple Choice

2x + 3 = 7

What is the first step to solve this equation?

• Add 3 to both sides

• Subtract 3 from both sides

• Multiply 3 to both sides

• Divide by 3 to both sides

Multiple Choice

2x + 3 = 7

Subtract 3 to both sides

• 2x = 10

• 2x = 4

• 2x = 1

• 2x = 3

Multiple Choice

2x = 4

What is the next step to solve?

• Add 3 to both sides

• Subtract 3 from both sides

• Multiply 2 to both sides

• Divide by 2 to both sides

Multiple Choice

2x = 4

Divide both sides by 2

• x = 2

• x = 1

• x = 0

• x = 3

Multiple Choice

Solve this 2 step equation

5x + 3 = 13

• x = 2

• x = 1

• x = 0

• x = 3

Multiple Choice

Solve this 2 step equation

-3x + 2 = 14

• x = -2

• x = -1

• x = 0

• x = -4

Multiple Choice

Solve this 2 step equation

-4x - 2 = 14

• x = -2

• x = -1

• x = 0

• x = -4

Poll

How well do you know how to solve a 2 step equation?

• 100%

• getting close

• starting to understand

• no clue

Multiple Choice

2x + 4y = 12

2x + 3y = 10

Are both of these equations written in standard form

• yes

• no

Multiple Choice

2x + 4y = 12

2x + 3y = 10

Do the x terms or the y terms have the same number in front?

• x

• y

• neither

Multiple Choice

2x + 4y = 12

2x + 3y = 10

Should we add or subtract the 2 equations to eliminate the x terms?

• add

• subtract

• doesnt matter

Multiple Choice

2x + 4y = 12

2x + 3y = 10

What do you get when you subtract the 2 equations?

• 1y = 2

• 7y = 11

• 4x + 7y = 22

Multiple Choice

2x + 4y = 12

2x + 3y = 10

IF y =2, what will x b?

HINT: solve 2x + 4(2) = 12

• x = 1

• x = 2

• x = 3

2x + 4y = 12

2x + 3y = 10

• So we solved this system of equaitons

• y = 2

• x = 2

• so the ordered pair (2,2) is the solution

Multiple Choice

4x + 2y = 12

3x + 4y = 10

Do the x terms or the y terms have the same number in front?

• yes

• no

• neither

Multiple Choice

4x + 2y = 12

3x + 4y = 10

If we multiplied the TOP equation by 3 what does it become?

• 12x + 4y = 36

• 8x + 4y = 24

• 16x + 8y = 48

Multiple Choice

4x + 2y = 12

3x + 4y = 10

If we multiplied the BOTTOM equation by 4 what does it become?

• 12x + 16y = 40

• 9x + 12y = 30

• 6x + 8y = 20

Multiple Choice

Now we have

12x + 4y = 36

12x + 16y = 40

Does the x or the y have the same number in front?

• x

• y

• neither

Multiple Choice

12x + 4y = 36

12x + 16y = 40

Should we add or subtract the 2 equations to eliminate the x variable?

• Add

• Subtract

• neither

Multiple Choice

12x + 4y = 36

12x + 16y = 40

Subtract the equations

• 12y = 76

• 4y = 4

• -12y = -4

Multiple Choice

-12y = -4

Solve for y

• y = 1/3

• y = -1/3

• y = 3

Next we would plug the y value in to find the x value and we are then solving the system of equations for the point they have in common.

Poll

How well do you know how to solve a system of equations by elimination?

• 100%

• getting close

• starting to understand

• no clue

NEXT STEPS

• Tomorrow you have an attendance question due by 2PM for attendance credit

• You have a short assignment to complete due Monday on this topic to be done with KAMI- i will go over this next

• i will post a video to help you with the assignment if you are struggling by tomorrow

• There will be a short 3 question Google Form quiz posted to google classroom tomorrow on this topic as well