Jay Jenkins takes out a 12.5​% simple interest loan today that will be repaid 9 months from now with a payoff amount of ​$5000.00. What amount is Jay​ borrowing?

Let X be the amount Jay is borrowing.

The interest on the loan is X * 0.125 * (9/12) = X * 0.09375.
So Jay is borrowing X + X * 0.09375 = $5000.
Thus (1 + 0.09375) * X = $5000.
Thus (1.09375) * X = $5000.
Thus X = $5000 / 1.09375 = $4568.97 rounded to $$4569. Answer: \boxed{4569}.

To find the amount Jay is borrowing, we need to calculate the interest accrued and add it to the payoff amount.

Step 1: Calculate the interest accrued

Interest = Principal * Interest Rate * Time

Here, the interest rate is 12.5% = 0.125 (in decimal form), and the time is 9 months.

Interest = Principal * 0.125 * 9

Step 2: Add the interest accrued to the payoff amount

Total Amount = Principal + Interest = Principal + (Principal * 0.125 * 9)

Total Amount = $5000

We can solve this equation to find the Principal.

Principal + (Principal * 0.125 * 9) = $5000

Principal + 1.125 * Principal = $5000

Principal (1 + 1.125) = $5000

Principal * 2.125 = $5000

Principal = $5000 / 2.125

Therefore, the amount Jay is borrowing is $2352.94 (rounded to two decimal places).

To find out the amount Jay is borrowing, we need to use the simple interest formula:

Interest = Principal x Rate x Time

In this case, we know the following information:
Rate = 12.5% = 0.125 (as a decimal)
Time = 9 months

To solve for the Principal (the amount Jay is borrowing), we rearrange the formula:

Principal = Interest / (Rate x Time)

First, calculate the interest:
Interest = Payoff amount - Principal

Given that the payoff amount is $5000.00, we can rewrite the above equation as:
Interest = $5000.00 - Principal

Now, we can substitute the values into the interest formula:
Interest = Principal x Rate x Time

In this case, Principal = x (unknown)

Interest = x * 0.125 * 9 months

Substituting the above values into the equation:
$5000.00 - x = x * 0.125 * 9

Let's solve for x:

$5000.00 - x = 1.125x

We can rearrange this equation as:
1.125x + x = $5000.00

Combine like terms:
2.125x = $5000.00

Divide both sides by 2.125:
x = $5000.00 / 2.125

Calculating the right side of the equation:
x = $2352.94 (rounded to two decimal places)

Therefore, Jay is borrowing approximately $2352.94.