24
x
^2
+
54
x
+
21,
if you would like me to explain how to do it, I can in the comments.
Answer:
(1.5, -6)
Step-by-step explanation:
To find the x coordinate of the midpoint
(x1+x2)/2 = (8+-5)/2 = 3/2 = 1.5
To find the y coordinate of the midpoint
(y1+y2)/2 = (-3+-9)/2 = -12/2 = -6
Use the formula for simple interest:
i = p* r* t
Here, $120 = $2000*r* (18/12 years)
$120
Then r = ------------------ = 0.04. That's 4% per year.
$2000(1.5)
