Lesson 5: Practice Problems
Problem 1
Solve each of these equations. Explain or show your reasoning.
Problem 2
Clare was solving an equation, but when she checked her answer she saw her solution was incorrect. She knows she made a mistake, but she can’t find it. Where is Clare’s mistake and what is the solution to the equation?
Problem 3
Solve each equation, and check your solution.
Problem 4 From Unit 3 Lesson 13
Here is the graph of a linear equation.
Select all true statements about the line and its equation.
One solution of the equation is
. One solution of the equation is
. One solution of the equation is
. There are 2 solutions.
There are infinitely many solutions.
The equation of the line is
. The equation of the line is
.
Problem 5 From Unit 3 Lesson 9
A participant in a 21-mile walkathon walks at a steady rate of 3 miles per hour. He thinks, “The relationship between the number of miles left to walk and the number of hours I already walked can be represented by a line with slope