Unit 6 Review

Angel got a $20 gift card to an online music store. He uses the gift card to buy an album for $4.79. He also wants to use the gift card to buy some songs. Each song costs $1.99.

Which of these inequalities describes this situation, where n is the number of songs Angel wants to buy?

• 4.79 - 1.99n ≥ 20

• 4.79 - 1.99n ≤ 20

• 4.79 + 1.99n ≥ 20

• 4.79 + 1.99n ≤ 20

Which number line shows all the values of x that make the inequality -3x + 1 ≥ 7 true?

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Select all expressions that are equivalent to 8x + 4 - (2x + 2)

• 8x + 4 - 2x - 2

• 8x + 4 - 2x + 2

• 6x + 6

• 6x + 2

• 8x - 2x + 4 - 2

​ ​ ​ ​ ​ At midnight, the temperature in a city was 4 degrees Celsius. The temperature was dropping at a steady rate of 3 degrees Celsius.

Write an inequality that represents t, the number of hours past midnight, when the temperature was colder than -2 degrees Celsius.

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At midnight, the temperature in a city was 4 degrees Celsius. The temperature was dropping at a steady rate of 3 degrees Celsius.

Write an inequality that represents t, the number of hours past midnight, when the temperature was colder than -2 degrees Celsius and SOLVE then graph the solution by DRAWING on the number line to show all values of t that make your inequality true.

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OFF

Evaluate responses using AI:

OFF

• He did not make a mistake.

• He did not combine like terms correctly.

• He did not add correctly.

• He did not subtract correctly.

Evaluate responses using AI:

OFF

Halo's family car holds 21 gallons of fuel. Each day the car uses 1.5 gallons of fuel. A warning light comes on when the remaining fuel is 2.5 gallons or less.

Write an inequality that represents the number of days driven without the warning light coming on.