<span>4 4/8 + 3/4
=4 1/2 + 3/4
=4 2/4 + 3/4
= 5 1/4</span>
<span>Simplifying
graph + -1x + -9y = 8
Solving
aghpr + -1x + -9y = 8
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Add 'x' to each side of the equation.</span>
Rate = 63.75/850=.075*100%= 7.5%
7.5% is Isabella's rate of commission.
This is a perfect square trnomial
(a+b)²=a²+2ab+b²
we see that a=5x and b=2
(5x)²+2(5x)(2)+2²=0
factor
(5x+2)²=0
set equal to zero
5x+2=0
5x=-2
x=-2/5