Answer: True
Step-by-step explanation: I made a picture and it adds up:
r = 5
Step-by-step explanation:
Ax + 3 = 7 - bx .....add bx to both sides
ax + bx + 3 = 7 ...subtract 3 from each side
ax + bx = 7 - 3
ax + bx = 4 ....factor out x
x(a + b) = 4 ...divide both sides by (a + b)
x = 4 / (a + b) <==
Bringing to mind SOHCAHTOA, we remember that the sine is the opposite divided by the hypotenuse.
Thus, our answer is

.
Answer:

Step-by-step explanation:
The simple interest is calculated only on initial amount deposited and so the interest per year is constant.
Let the initial amount be "x".
The interest for first n years is,

and so the final amount is

Similarly for n-1 years,
interest is = 
and amount is ,
A2 = x + 
The required ratio is ,
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