Answer
The answer and procedures of the exercise are attached in the following archives.
Step-by-step explanation:
You will find the procedures, formulas or necessary explanations in the archive attached below. If you have any question ask and I will aclare your doubts kindly.
To solve this (assuming that you mean simple interest) you need to first know the formula for exponential growth witch is S(1+(-)I)

so with all of are numbers inputed it looks something like this 800(1+.0425)

because,
S=starting amount, I=interest rate, and T=Time (amount of time that goes by)
back to the equation it would equal 1027 (rounded to the nearest dollar)
Enjoy!=)
20 to 10 I think but not sure hope this helps
3y=-2x-19 -5x-3y=-2-5x - (-2x - 19) = -2
-5x + 2x + 19 = -2
-3x = -21
x = 7
3y = -2(7) - 19
3y = -14 - 19
3y = 33
y = 11
Answer:
x= -4
Step-by-step explanation:
hope this helped :)