Writing & Solving Equations and Inequalities

The city zoo welcomed two baby animals. The baby ostrich weighed 2.6 pounds and the baby llama weighed 20.6 pounds

• The ostrich will gain 13.4 pounds each month.

• The llama will gain 11.4 pounds each month.

How many months will it take for the ostrich to weigh the same as the llama?

• 4

• 9

• 15

• 20

BigMax Cars is offering interest-free financing on all their vehicles. A red sportscar

is $575 per month plus a down payment of $3,000. A blue sportscar is $475 per

month plus a down payment of $5,000.

Which inequality represents the situation where the cost of the red

sportscar is more than the cost of the blue sportscar after x months?

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• Nancy has a stamp collection with 15 stamps. She gets 300 more from

  her uncle. Rhonda has a stamp collection with 140 stamps. She plans on

  buying 20 more stamps next month. What is x, the number of months it

  will take for Nancy and Rhonda to have the same number of stamps?

• Nancy has played 300 games of tennis. She plays 15 games each month.

  Rhonda has played 20 games of tennis and plays 140 games each month.

  What is x, the number of months it will take for Nancy and Rhonda to

  have played the same number of games?

• Nancy opened up a savings account with $300. She deposits $15 each

  week. Her friend Rhonda opened up a savings account with $140 and

  deposits $20 each week. What is x, the number of weeks it will take for

  Nancy and Rhonda to have the same amount of money?

• Nancy has $300 and spends $15 each week on gas. Rhonda has $140

  and spends $20 each week on gas. What is x, the number of weeks it will

  take for Nancy and Rhonda to have the same amount of money?

The model represents an equation. What value of x makes the equation true?

Crosby is entering a reading competition and has already read 14 books. Hadleigh

has read zero books.

• Crosby plans to read 2 books each week.

• Hadleigh plans to read 4 books each week.

Which equation represents x, the number of books Crosby and Hadleigh each have

to read so that the number of books is the same for both of them?

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• 
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• 2

• 5

• 12

• 28

The model represents an equation.

What value of x makes the equation true?

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• 
• 

• The cost of 4 large pizzas plus an $8 salad is greater than the cost of 6

  large pizzas.

• The cost of 4 large pizzas is $8 less than the cost of 6 large pizzas.

• The cost of 4 large pizzas plus an $8 salad is less than the cost of 6 large

  pizzas.

• The cost of 4 large pizzas is greater than the cost of 6 large pizzas plus an

  $8 salad.

Elena bowls x games.

• Bowling Alley A charges $7.25 for shoes plus $0.50 for each game of

bowling.

• Bowling Alley B charges $1.25 for shoes plus $1.50 for each game of

bowling.

After how many games will both Bowling Alley A and Bowling Alley B cost the

same amount?