Open Up - Grade 8 - Mathematics - Unit 5 - Lesson 3

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

Select all the different equations that describe the same function:

Graph a system of linear equations with no solutions.(Show Your work)

Write an equation for each line you graph.(short answer)

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.

Write an equation relating the two variables.

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.

Rearrange the equation so b is the independent variable.

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.

Rearrange the equation so r is the independent variable.

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.

Rearrange the equation so r is the independent variable.

Solve each equation and check your answer.

2x+4(3-2x)=\frac{3(2x+2}{6}+4

Solve each equation and check your answer.

4z+5=-3z-8

Solve each equation and check your answer.

\frac{1}{8}q=\frac{q-1}{4}