Mathematics

Goodwin

25 August, 16:58

Peter is saving for a down payment of $50,000 for a new home. Yesterday, he created an equation that models his current savings plan to

determine how long it will take him reach his goal. In his model, y represents the total amount saved and x represents the number of months

since yesterday. Which statement is true?

Step 1:

Step 2:

30,000

Step 3:

y = 30,000 + 2,000x

y - 30,000 = 30,000 + 2,000x-

y - 30.000 = 2,000x

y - 90,000 2,000

2,000 = 2,000

Step 4:

y

- 30,000

Step 5:

2,000 = x

50,000 - 30,000

=x

2,000

Step 6:

Step 7:

10 = x

O A.

Peter used the division property of equality in step 4.

OB.

Peter used the substitution property in step 5.

C.

Peter used the subtraction property of equality in step 5.

OD. Peter used the associative property in step 6.