Identifying Variables in Grade 7 Linear Word Problems

Maria is saving money to buy a new bike. She currently has $50 and saves $10 each week. Write an equation to represent the total amount of money she will have after 'w' weeks. What do the variables represent?

• Total Amount = 50 + 10w

• Total Amount = 50 - 10w

• Total Amount = 10 + 50w

• Total Amount = 50 + 5w

A bookstore sells notebooks for $3 each and pens for $2 each. If you buy a total of 10 items and spend $24, how many notebooks and pens did you buy? Define the variables used in your equation.

• 5 notebooks and 5 pens

• 2 notebooks and 8 pens

• 3 notebooks and 7 pens

• 4 notebooks and 6 pens

A gardener is planting flowers in rows. If he plants 'r' rows and each row has 5 flowers, write an equation to express the total number of flowers planted. What does each variable represent in this context?

• total_flowers = r + 5

• total_flowers = r - 5

• total_flowers = r / 5

• total_flowers = r * 5

A movie theater charges $8 for adult tickets and $5 for child tickets. If a family buys 3 adult tickets and 'c' child tickets for a total of $34, write an equation to find 'c'. Identify the variables in your equation.

• 2

• 4

• 1

• 3

Samantha is making bracelets. Each bracelet requires 4 beads. If she has 'b' beads, write an equation to find out how many bracelets she can make. What do the variables represent?

• number of bracelets = b - 4

• number of bracelets = b / 4

• number of bracelets = b + 4

• number of bracelets = 4b

A school is organizing a field trip. The cost per student is $15, and there are 's' students attending. Write an equation to find the total cost of the trip. Identify the variables in your equation.

• total_cost = 15 * s

• total_cost = s + 15

• total_cost = 15 - s

• total_cost = 15 / s

A train travels at a speed of 60 miles per hour. If it travels for 't' hours, write an equation to express the total distance traveled. What do the variables represent in this scenario?

• distance = t/60

• distance = 60 + t

• distance = 60t

• distance = 60t^2

A recipe requires 2 cups of flour for every 3 cups of sugar. If you have 'f' cups of flour, write an equation to find out how much sugar you need. Identify the variables in your equation.

• s = (3/2) * f

• s = (2/3) * f

• s = 2 * f

• s = f + 3