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IM: 8.5.3: Equations for Functions (Practice)

By Newsela Staff
Last updated 2 months ago
8 Questions
1.

Here is an equation that represents a function: 72x + 12y = 60.

Select all the different equations that describe the same function:

2.

Graph a system of linear equations with no solutions.

Write an equation for each line you graph.

Brown rice costs $2 per pound, and beans cost $1.60 per pound. Lin has $10 to spend on these items to make a large meal of beans and rice for a potluck dinner. Let b be the number of pounds of beans Lin buys and r be the number of pounds of rice she buys when she spends all her money on this meal.
3.

Write an equation relating the two variables.

4.

Rearrange the equation so b is the independent variable.

5.

Rearrange the equation so r is the independent variable.

6.

Solve the equation and check your answer.

2x + 4(3 - 2x) = 3(2x+2)/6+ 4

7.

Solve the equation and check your answer.

4z + 5 = -3z - 8

8.

Solve the equation and check your answer.

1/2 - 1/8q = q - 1/4