Step-by-step explanation:
The formula for simple interest is expressed as
I = PRT/100
Where
P represents the principal or initial amount of money invested.
R represents interest rate
T represents time
Considering the investment on account A,
I = $6.94
R = 3.7%
T = 9 months = 9/12 = 0.75 years
6.94 = (P × 3.7 × 0.75)/100 = 0.02775P
P = 6.94/0.02775 = $250
Considering the investment on account B,
I = $13.80
R = 2.3%
T = 18 months = 18/12 = 1.5 years
13.8 = (P × 2.3 × 1.5)/100 = 0.0345P
P = 13.8/0.0345 = $400
To determine the account that earned more interest in the first month,
250/9 = $27.8
400/18 = $22.2
Account A earned you the most interest the first month because $27.8 is higher than $22.2
The reciprocal of a/b is b/a
so the reciprocal of 1/4 will be 4/1
Subtract 7 from both sides leaving you with
26=-2a
Divide -2 from both sides leaving to you then with
-13=a and this is the answer
sum of 2 numbers is the answer / number you get after addiing the 2 numbers
we are told that sum of 8 and another number is 100
so lets call the other number x
so if we put this in an equation
8 + x = 100
we have to make x the subject of the formula as we need to find x
so we have to make x the only term on one side of the equation
for this we carry out the reverse operator for addition of 8 on both sides of the equation
reverse operator for addition is subtraction
x + 8 - 8 = 100 - 8
x = 92
the number is 92
