4 = (r-2) t
8 = (r+2) t
4 = (r-2) * [8/(r+2)]
4 = (8r-16)/ (r+2) . . .multiply by 2
4r + 8 = 8r - 16
4r = 24
r = 6
hope this helps
The answer is x=3 Your Welcome!
Answer:
The interest After 6 years is $ 79.03
Step-by-step explanation:
Given as :
The principal amount deposited in account = $ 700
The rate interest earn = 1.8 % per year
The Time period = 6 years
<u>From Compounded Method </u>
Amount = Principal × 
Or, Amount = $ 700 × 
Or, Amount = $ 700 × 
Or, Amount = $ 700 × 1.1129
∴ Amount = $ 779.03
Now , Interest = Amount - Principal
I.e Interest = $ 779.03 - $ 700 = $ 79.03
Hence The interest After 6 years is $ 79.03 , Answer
Answer:
10
Step-by-step explanation:
<span>Melvina's age is = x, Bettina's age is = 3x
the equation is
x + 20 = 3x - 20
subtract 3x from both sides
-(3x) + x +20 = 3x - 20 - (3x)
-2x + 20 = -20
subtract 20 from both sides
-2x + 20 - (20) = -20 - (20)
-2x = - 40
divide both sides by -2
(-2x)/-2 = (-40)/-2
x = 20
Melvinas age is 20 and Bettinas age is 60</span>