Open Up - Grade 8 - Mathematics - Unit 4 - Lesson 4

Mai and Tyler work on the equation \frac{2}{5}b+1=-11 together. Mai's solution is b = -25 and Tyler's is b = -28. Here is their work: Do you agree with their solutions?

• Both have correct solutions.
• Only Mai has a coorrect solution.
• Only Tyler has a coorrect solution.
• Neither of them have a correct solution.

Tags

8.EE.7.a

8.EE.7.b

Andre solved an equation, but when he checked his answer he saw his solution was incorrect. He knows he made a mistake, but he can’t find it. Where is Andre’s mistake and what is the solution to the equation?

Tags

8.EE.7.a

8.EE.7.b

Choose the equation that has solutions (5, 7) and (8, 13).

• 3x - y =8
• y=x+2
• y-x=5
• y=2x-3

Tags

8.EE.7.a

8.EE.7.b

A length of ribbon is cut into two pieces to use in a craft project. The graph shows the length of the second piece, x, for each length of the first piece, y. How long is the ribbon?

Tags

8.EE.7.a

8.EE.7.b

A length of ribbon is cut into two pieces to use in a craft project. The graph shows the length of the second piece, x, for each length of the first piece, y. Explain what the slope of the line represents and why it fits the story.

Tags

8.EE.7.a

8.EE.7.b