What Is the Secret Code

Name:______

What is the Secret Code??? Solving Equations Using the TI-NSpire CAS Unit

Your Task: Welcome to the investigation of cracking the secret code. Your ultimate task is to figure out the secret code by finding out who is correct. For each question below, use the calculator to try the two different methods shown. Circle the correct answer and fill in the missing blanks of the solution. Take the first letter of the student’s name that wrote the correct answer, and fill it in under the number of the question to break the secret code.

Can you crack the secret code???

What is the secret code?

The most important thing to remember when solving equations is to keep everything

______! 7 1 4 1 6 3 2 5

** What you do to one side, you must do to the other. **

How to solve in your calculator? Step 1: Turn on the NSpire CAS unit and move to the Home screen by pressing c. Step 2: Choose 6: New Document Step 3: Choose No, you do not want to save this document. Press 1: Add Calculator Step 3: Now you have a fresh page to start your work. Type in the equation and press enter. Step 4: Investigate on the calculator using the “thinking bubbles” as a guide to see which answer is correct. Step 5: Good luck!!

1. Solve for x. Who is correct?

Adam Brian I need to get Maybe I should add rid of the 4 x  4  10 x  4  10 on the left 4 to each side. Maybe x  4  ___  10  ____ OR x  4  ___  10  ___ side. I can take away 4. x  6 x  14

MFM 1P1 Name:______

I should do the Julian Evan opposite I should take 3 operation of 3x away on each 3x  27 and divide by 3. 3x  27 side. 3x 27 3x  ___  27  ___ OR  x  24 x  9

Pauline Carla I should I should get take 1 away one x by 2x 1  5 from both dividing it by 2x 1  5 sides. 2. 2x 5 Now I can 1  2x 1 ___  5  ___ move the 1 to OR the other side. 2x  4 I think I x 1  5 should cut x  2 the 2x in half. x  4

I remember my Laura Saul teacher said to I remember collect the like now, move terms first. 8  5x 1  14 8  5x 1  14 the numbers over ___ 5x  14 ___ 5x  14 I need to move ___ ___ 5x  14  ___ OR ___ ___ 5x  14  ___ all the numbers to one side and  5x  ___  5x  ___ Now I just all the have to get variables to the x  1 x  5 one x. other side.

MFM 1P1 Name:______

Jamaal Dolly Collect the Collect the like terms like terms first. 8x  7x 1  24 8x  7x 1  24 first. ___1  24 ___1  24 Then I can OR solve. ___1____  24 ______1____  24 ____ Then I can x  25 x  23 solve.

6. Solve for x. Who is correct? IWe found both my think answer we are in Dominic thecorrect back but of wethe don’tbook Nanna butlike Ito don’t show know our work.how toCan solve you it.please Can helpyou helpthe one me? who is correct x  4  7  2x to show their work? x  4  7  2x

x  11 x  11

7. Solve for x. Who is correct? I found a different answer in the back of I found my answer in Brian Samantha the book. I need your the back of the book help too. Which one is but I don’t know correct? how to solve it. Can you help me? 144  7x  5x  0 144  7x  5x  0

x  12 x  72

MFM 1P1 Name:______

Assessment - Journal: Your friend is having problems with solving equations. Since you are now an expert with solving equations and a great friend, you want to help. Make up a question and fully explain how you would tell your friend how to solve it. Unfortunately your friend can only speak to you over the phone so you have to explain it as detailed as possible for them to understand. What would you say?

MFM 1P1