Answer:
2.9989054e+53
Step-by-step explanation:
Using it's formula, it is found that the monthly payment should be of $688.49 in order to pay off the debt in 15 years.
<h3>What is the monthly payment formula?</h3>
It is given by:

In which:
- n is the number of payments.
For this problem, the parameters are given as follows:
A = 90000, r = 0.045, n = 15 x 12 = 180.
Hence:
r/12 = 0.045/12 = 0.00375.
Then we solve for A to find the monthly payment, as follows.


A = $688.49
More can be learned about the monthly payment formula at brainly.com/question/22846480
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Answer:
k = 6
Step-by-step explanation:
Since the figures are similar, we can use ratios to solve
4 28
----- = -------
k 42
Using cross products
4 * 42 = 28k
Divide each side by 28
4*42/28 = 28k/28
6 = k
Subtract 3x from both sides
3x - 3x - 2y = -3x - 16
divide both sides by -2
-2y / -2 = -3x / -2 - 16 / -2
y = -3/2x + 8
Answer: -1
Solution:
20 + 4x = 16
Rearrange the terms
4x = 16 - 20
Calculate
4x = -4
Divide both sides
x = -4/4
Simplify
x = -1