Math Problem Statement

You and your spouse have decided it is time to purchase a home. You have a total of $10,723 that you can use for a down payment and closing costs. Since you will not be paying rent, you will have $1,070 in your budget to pay a mortgage. Your agent tells you that total closing costs will be $2,000. Your monthly escrow for taxes and insurance will be $150 in addition to your mortgage payment. You will qualify for a 30-year mortgage at 6.5%. What is the maximum you can pay for your new home?

Group of answer choices

$150,003.17

$154,276.95

$155,027.73

$157,770.80

Solution

To determine the maximum amount you can pay for a new home, we need to calculate the loan amount for which the monthly mortgage payment, excluding taxes and insurance, fits within your budget.

Here’s the step-by-step breakdown:

  1. Determine the amount available for the down payment:

    • You have $10,723 available, but $2,000 is required for closing costs, so the down payment is: Down Payment=10,7232,000=8,723\text{Down Payment} = 10,723 - 2,000 = 8,723
  2. Determine the monthly mortgage payment (P&I – Principal and Interest) you can afford:

    • Your total budget for housing expenses is $1,070.
    • From this, $150 goes toward taxes and insurance, leaving $920 for the mortgage payment (Principal and Interest): \text{Mortgage Payment (P&I)} = 1,070 - 150 = 920
  3. Use the mortgage formula to determine the maximum loan amount: The monthly payment for a mortgage can be calculated using the formula for the present value of an annuity: M=P×r(1+r)n(1+r)n1M = P \times \frac{r(1+r)^n}{(1+r)^n - 1} Where:

    • MM is the monthly mortgage payment ($920),
    • PP is the loan amount (which we are solving for),
    • rr is the monthly interest rate, which is the annual interest rate divided by 12 (6.5% annual interest rate gives r=0.065/12=0.005417r = 0.065 / 12 = 0.005417),
    • nn is the total number of monthly payments over 30 years (30 years = 360 months).

    Rearranging the formula to solve for PP: P=M×((1+r)n1)r×(1+r)nP = \frac{M \times \left( (1+r)^n - 1 \right)}{r \times (1+r)^n}

  4. Plug in the values: P=920×((1+0.005417)3601)0.005417×(1+0.005417)360P = \frac{920 \times \left( (1+0.005417)^{360} - 1 \right)}{0.005417 \times (1+0.005417)^{360}}

    Calculating the factors: (1+0.005417)3606.68559(1+0.005417)^{360} \approx 6.68559 Now substitute and solve: P=920×(6.685591)0.005417×6.68559P = \frac{920 \times (6.68559 - 1)}{0.005417 \times 6.68559} P=920×5.685590.03621P = \frac{920 \times 5.68559}{0.03621} P5,232.74280.03621144,469.22P \approx \frac{5,232.7428}{0.03621} \approx 144,469.22

  5. Add the down payment to find the maximum home price: Now, add the down payment of $8,723 to the loan amount: Maximum Home Price=144,469.22+8,723=153,192.22\text{Maximum Home Price} = 144,469.22 + 8,723 = 153,192.22

  6. Compare with the given options: The closest option to this calculated value is $154,276.95.

Answer: $154,276.95


Would you like more details on the calculations or another aspect of this process?

Here are 5 related questions to explore:

  1. How does a higher interest rate affect the loan amount you can qualify for?
  2. What would happen if your budget for the mortgage increased by $100 per month?
  3. How do changes in down payment affect the total home price you can afford?
  4. What if the term of the mortgage changed from 30 years to 15 years? How would that impact your payments?
  5. How much could you afford with no closing costs, assuming the same budget?

Tip: Always check if there are programs or grants available for first-time homebuyers that could reduce your down payment or closing costs.

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Math Problem Analysis

Mathematical Concepts

Annuities
Interest Rates
Loan Calculations

Formulas

Present Value of an Annuity: M = P × (r(1+r)^n) / ((1+r)^n - 1)
Maximum Loan Amount: P = (M × ((1+r)^n - 1)) / (r × (1+r)^n)

Theorems

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Suitable Grade Level

Grades 11-12