P = -16
Subtract 7 from both sides to isolate the variable.
Answer:
- 2/9
Step-by-step explanation:
Learn Your Rules: (-)(-)(-) = Negative
The rest is easy. All you have to do is multiply it like normal fractions. You get 2/9. Tack on the negative on the back: -2/9
Hope this helps!
Answer:
The amount of interest earned at the end of 14 years would be $672.3486
Step-by-step explanation:
This is a simple interest problem.
The simple interest formula is given by:

In which E are the earnings, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.
In this problem, we have that:

So

The amount of interest earned at the end of 14 years would be $672.3486
There started with 50 and it doubles so that means:
100 at the end of year 1
200 at the end of year 2
400 at the end of year 3
800 at the end of year 4