Let's say each row has x desks and there are y rows.
We then know that x*y =25
We also know that x*2-5=y (number number of rows is five less than twice the number of desks in each row)
So we substitute: x*(x*2-5)=25
putting numbers out of the brackets:
2x*x-5x=25
2x*x-5x-25=0
(2x+5)(x-5)=0 (this bracketing is true: you can check it by expanding it:
2x*x-10x+5x-25
So that means that either x=-2.5which can't be : there can't be a fractional number of benches,
or x=5
so each row has 5 desks and there are 2*5-5 rows, or 5 rows.
Answer:
Interest earned= $6,060
Step-by-step explanation:
Giving the following formula:
Principal (P)= $12,625
Interest (r)= 4%= 0.04
Period of time (t)= 12 years
<u>To calculate the interest earned after twelve years, we need to use the following formula:</u>
I= P*r*t
I= (12,625*0.04*12)
I= $6,060
Interest earned= $6,060
Answer:
E which is 5 * sqrt(2)
Step-by-step explanation:
yeah ya..... right?
-5 is the real part and 6i is the imaginary part. This can be determined by looking which number has the "i" attached to it.