Math Practice 101
Homework Explained - Math Practice 101

Dear guest, you are not a registered member. As a guest, you only have read-only access to our books, tests and other practice materials.

As a registered member you can:

Registration is free and doesn't require any type of payment information. Click here to Register.
Go to page:  

Grade 8 HMH Go Math - Answer Keys
Chapter 8:Solving Systems of Linear Equations; Lesson 3: Solving Systems by Elimination


Please share this page with your friends on FaceBook

FOCUS ON HIGHER ORDER THINKING

  • Question 16 (request help)

    Communicate Mathematical Ideas Is it possible to solve the system

    \(\begin{cases}
    3x - 2y = 10\\
    x + 2y = 6
    \end{cases}\)
    by using substitution? If so, explain how. Which method, substitution or elimination, is more efficient? Why?
  •    
  • Question 17 (request help)

    Jenny used substitution to solve the system

     \(\begin{cases}
    2x + y = 8\\
    x - y = 1
    \end{cases}\) . Her solution is shown below.
    Step 1 : y = -2x + 8                            Solve the first equation for y.
    Step 2 : 2x + (-2x + 8) = 8                 Substitute the value of y in an original equation.
    Step 3 : 2x - 2x + 8 = 8                      Use the Distributive Property.
    Step 4:  8 = 8                                     Simplify.
    a. Explain the Error Explain the error Jenny made. Describe how to correct it.
  • Type below:
  • Question 17 (request help)

    b. Communicate Mathematical Ideas Would adding the equations have been a better method for solving the system? If so, explain why.
  •    

Yes, email page to my online tutor. (if you didn't add a tutor yet, you can add one here)