Answer:
Colin will have $1055.46 after 7 years.
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.
After t years, the total amount of money is:
.
In this question:
So
Total
Colin will have $1055.46 after 7 years.
Your two equations would be:
150 = x + y
2560 = 20x + 12y
after solving,
95 for $20
55 for $12
Yes, in the sense that the new area could be written as (x+1)^2 / 1.
Usually we would not bother with the "1" as divisor.
Let's actually do the work: what is the area of the square if we increase the side length of the existing square by 1 ft?
(x+1)^2 = x^2 + 2x + 1 (This is not a fraction, and thus not the ratio of
two integers, which, in turn, is the definition of
"rational number."
Answer:
-9/2
Step-by-step explanation:
-2x-5 = 4
+5 +5
-2x = 9
------ ------
-2 -2
x = -9/2
