Equations

Mona bought a PS-4 with money she borrowed from her mom.  She made an initial payment to her mom of $25, and will pay $15 each month until the PS-4 is paid off.  Which equation represents the relationship between m, the number of monthly payments Mona has made, and t, the total amount that Mona has paid her mom?

• A.

  T = 15m + 25

• B.

  T = 25m + 15

• C.

  T = 15m - 25

• D.

  T = 25m - 15

Using the equation from question 1, how many months will it take to pay her mom a total of $130?

Shonda will earn the same number of dollars every hour to add to the money she has already saved.  The table shows the number of dollars Shonda will have at the end of x hours. Shonda’s Money Number of Hours, x14813Number of Dollars, y$47.50$70$100$137.50  How many dollars has Shonda already saved, and how many dollars is she paid every hour?  

• A.

  Shonda has already saved $40 and she will earn $22.50 per hour.

• B.

  Shonda has already saved $25 and she will earn $22.50 per hour.

• C.

  Shonda has already saved $25 and she will earn $7.50 per hour.

• D.

  Shonda has already saved $40 and she will earn $7.50 per hour.

A painter charges $17 an hour plus $35 for general supplies.  Which of the following equations represents the total cost, y, for the painter working x hours?

• A.

  Y = 35x + 17

• B.

  Y = 17x + 35

• C.

  Y = 42x

• D.

  Y = 17x

Using the equation from question #4, if the painter works a total of 30 hours, what would be the total cost to hire him?

Which situation represents a proportional relationship?

• A.

  The cost of buying 5 pairs of jeans at $25.95 per pair with a coupon for 10% off the total cost

• B.

  The cost of buying 6 pairs of shoes at $35.50 per pair with a shipping charge of $5 for the entire order

• C.

  The cost of buying 5 pairs of pants at $28.99 per pair

• D.

  The cost of buying 6 pairs of shorts at $10.50 each plus the cost of a gift bag at $2.25