Writing two step equations and inequalities

331 students went on a field trip. Six buses were filled and 7 students traveled in cars. Let x represent the number of students on each bus.

• 7x + 6 = 331

• 13x = 331

• 6x + 7 = 331

• 331 - 7 = 6x

Tags

CCSS.HSA.CED.A.3

Pizzazz Publications paid $4000 to have some books printed. The printer charges $800 plus $5 per book. Let x represent the number of books.

• 800 + 5x = 4000

• 800x + 5 = 4000

• 4000 + 5x= 800

• 4000 = 800 + 5

Tags

CCSS.HSA.CED.A.3

Jessica spent $10 Target. She wants to buy some candy bars that cost $1.50 and one t-shirt that costs $6. Let x represent the number of candy bars she buys.

• 1.50 + 6x = 10

• 1.50x + 6 = 10

• 6x = 10 + 1.50

• 10x = 1.50 + 6

Tags

CCSS.HSA.CED.A.3

It costs Amy $0.20 to send a text message. She has already spent $5 in text messages this month. If she has a total of $12 that she can spend this month on text messages. Let x represent the number of texts she can still send this month.

• 0.20 + 5x = 12

• 0.20(5x) = 12

• 0.20x + 5 = 12

• 0.20x - 5 = 12

Tags

CCSS.HSA.CED.A.3

r divided by 8 is 9

• r/8 = 9
• 8/r = 9
• r = r/8
• 9 = 8/r

Tags

CCSS.6.EE.B.7

Which situation can be represented by the inequality
15 + 6x ≤ 100?

• Lazer Zone charges $15 plus $6 per person. If Andrea has a maximum of $100 to spend, how many people can Andrea invite to play laser tag?
• Lazer Zone charges $6 plus $15 per person. If Andrea has a maximum of $100 to spend, how many people can Andrea invite to play laser tag?
• Lazer Zone charges $15 plus $6 per person. If Andrea has a minimum of $100 to spend, how many people can Andrea invite to play laser tag?
• Lazer Zone charges $6 plus $15 per person. If Andrea has a minimum of $100 to spend, how many people can Andrea invite to play laser tag?

Tags

CCSS.7.EE.B.4B

Last Friday Samantha had $22.50. Over the weekend, she received some money for cleaning. She now has more than $32.00. Which inequality represents this situation?

• 22.50 - x > 32

• 22.50x > 32

• 22.50 + x > 32

• 22.50 +x < 32

Tags

CCSS.7.EE.B.4B

The temperature in the ice rink must stay below 50°F. This morning, the temperature was 71°F. The ice rink runs a cooling device that can decrease the temperature by 3.5° every hour. Which inequality shows how long it will take for the temperature to fall below 50°F?

• 50 + 3.5x < 71
• 71 - 3.5x < 50
• 71 - 3.5x ≤ 50
• 71 + 3.5x < 50

Tags

CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.B.8

The vet told Casey that her dog should weigh at most 70 lbs. Her dog weighs 106 pounds, so Casey set a goal that he would lose 4 pounds per week. Which inequality represents the number of weeks it take for Casey's dog to reach 70 lbs?

• 106 - 4x ≤ 70
• 70 + 4x ≤ 106
• 4x - 106 ≥ 70
• 106 - 4x< 70

Tags

CCSS.7.EE.B.4B

There were no more than 7 players left over after 127 soccer players in a league were divided into 5 teams with b players on each team. Write an inequality that can be used to find b, the number of players on each soccer team.

• 127⁄5b≥ 7
• 127+5b≤ 7
• 7 ≥ 127-5b
• 7 ≥ 127+5⁄b

Tags

CCSS.7.EE.B.4B