Solving Linear Inequality Word Problems

What is the minimum amount Ayumi needs to spend to use her debit card?

• $2

• $5

• $3

• $4

How much does one donut cost?

• $0.80

• $0.50

• $1.20

• $1.00

What is the cost of one bottle of orange juice?

• $1.50

• $1.20

• $1.00

• $0.80

If Ayumi buys 1 orange juice and d donuts, how can we express the total cost of the donuts?

• d/0.8

• 0.8 + d

• 0.8d

• d + 0.8

What inequality represents the condition that Ayumi needs to spend $4 or more?

• 0.8d + 1.2 ≥ 4

• 0.8d + 1.2 = 4

• 0.8d + 1.2 > 4

• 0.8d + 1.2 < 4

Which of the following expressions is NOT equivalent to 0.8d + 1.2?

• 0.8(d + 1.2)

• 0.8d + 1.2

• 0.8d + 0.96

• 0.8(d + 1.2) ≥ 4

What is the result of distributing 0.8 in the expression 0.8(d + 1.2)?

• 0.8d + 0.96

• 0.8d + 1.2

• 0.8d + 1.6

• 0.8d + 0.8

Which inequality correctly represents the spending condition for Ayumi?

• 0.8d + 1.2 ≥ 4

• 0.8d + 1.2 > 4

• 0.8d + 1.2 = 4

• 0.8d + 1.2 < 4

Why can we rule out the inequality 0.8(d + 1.2) > 4?

• It is not in dollars

• It does not include the 'or more' condition

• It is not greater than 4

• It is not an inequality

What is the final correct inequality that models Ayumi's spending condition?

• 0.8d + 1.2 ≥ 4

• 0.8d + 1.2 > 4

• 0.8d + 1.2 = 4

• 0.8d + 1.2 < 4