Exploring Real-Life Linear Equations and Evaluating Expressions

A store sells x notebooks for $p each. If the total cost is $r, what is the equation representing this situation?

• p = r - x

• x = r / p

• r = p + x

• r = x * p

If you have 3 more than twice the number of apples (x), express the total number of apples as p(x+q)=r. What is the value of r if x=5?

• 13

• 8

• 15

• 10

A car travels at a speed of p miles per hour. If it travels for x hours, express the distance traveled as p(x+q)=r. What is r if p=60 and x=2?

• 120

• 100

• 150

• 180

You are saving money for a video game that costs $r. If you save p dollars each week, express the total savings after x weeks as p(x+q)=r. What is the equation?

• p(x + q) = r

• p(x - q) = r

• p(x + q) = r + 1

• p(x) = r - q

A recipe requires p cups of flour for every x servings. If you want to make r servings, how can you express the amount of flour needed?

• (p + x) * r

• (p - x) * r

• p * (r / x)

• (p / x) * r

If a rectangle has a length of p and a width of (x+q), express the area as p(x+q)=r. What is the area if p=4, x=3, and q=2?

• 12

• 24

• 16

• 20

A gardener plants x flowers in each row. If there are p rows, express the total number of flowers as p(x+q)=r. What is r if p=5 and x=10?

• p(x - q)

• p(10 + 5)

• 5(10 + q)

• 5(10 - q)

You are reading a book that has p pages. If you read x pages each day, express the total pages read after q days as p(x+q)=r. What is r if p=300, x=20, and q=5?

• 1000

• 7500

• 1500

• 6000

A factory produces p toys every hour. If it operates for x hours, express the total production as p(x+q)=r. What is r if p=50 and x=8?

• 300

• 600

• 500

• 400

If a train travels p miles in x hours, express the speed of the train as p(x+q)=r. What is the speed if p=120 and x=2?

• 60 miles per hour

• 30 miles per hour

• 90 miles per hour

• 120 miles per hour