Fourths, then b. Sorry if late.
Answer and Step-by-step explanation:
The cost of all the 6 magazines are: 6x
The cost of all the 9 newspapers are 9(x-3)
So, the total cost is the sum of all the items:
6x + 9(x-3) = 51
6x + 9x - 27 = 51
15x = 78
x = 5.2
Since the cost of one magazine is $x, the cost will be $5.20.
Answer:
I = $ 8.00
Equation:
I = Prt
Step-by-step explanation:
First, converting R percent to r a decimal
r = R/100 = 10%/100 = 0.1 per year,
then, solving our equation
I = 80 × 0.1 × 1 = 8
I = $ 8.00
The simple interest accumulated
on a principal of $ 80.00
at a rate of 10% per year
for 1 years is $ 8.00.