40 - x^2 = 0
x^2 = 40
x = + 40^0.5 or x = - 40^0.5
Not sure what your asking here
Answer:
$395.61
Step-by-step explanation:
The formula for simple interest is:

Where
i is the interest amount
P is the principal amount
r is the rate of interest per time period
t is the time period
Here,
P = 4869
we want to find after 30 months, that converted to years is:
30/12 = 2.5 years
t = 2.5
The annual rate is 3.25% = 0.0325
Now, substituting, we find our answer:

The interest earned is <u>$395.61</u>
7 + 2x = 51
hope this helps
7/10 is your correct answer