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21 December, 08:54

The formula for the cost of buying a car is

cost = 12 x monthly payment + deposit

a) Find the cost of a car when the monthly payment is E350 and

the deposit is E2 000.

b) The cost of another car is E8 000.

Find the monthly payment when the deposit is E2 600.

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Answers (2)
  1. 21 December, 09:12
    0
    Step-by-step explanation:

    a

    cost = 12*E350+E2000

    =E (4200+2000)

    =E6200

    b

    cost = 12 x monthly payment + deposit

    E8000=12*monthly payment+E2600

    E8000-E2600=12*monthly payment

    E5400=12*monthly payment

    E5400/12=monthly payment

    E450=monthly payment
  2. 21 December, 09:13
    0
    a) 6200

    b) 450

    Step-by-step explanation:

    Since the formula is cost = 12 x monthly payment + deposit, we can just substitute the values in for question a

    a) cost = 12 x monthly payment + deposit

    cost = 12 * 350 + 2000

    cost = 4200 + 2000

    cost = 6200

    b) cost = 12 x monthly payment + deposit

    8000 = 12 * monthly payment + 2600

    We need to work out the monthly payment so

    8000 = 12 * monthly payment + 2600

    → Minus 2600 from both sides to isolate monthly payment

    5400 = 12 * monthly payment

    → Divide both sides by 12 to isolate the monthly payment

    450 = monthly payment
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