Step-by-step explanation:
8x² -5x + 8 +(-2x² -8x + 3)
8x² -5x +8 -2x² - 8x +3
8x² -2x² -5x -8x +8 +3
6x² -13x +11
Yes it is in its simplest form
(percent change) = ((new value)/(old value) -1)*100%
.. = (1190/850 -1)*100%
.. = 40%
The coin was sold for a price 40% higher than its purchase price.
Answer: B)
Explanation: when rotating a point a 90 degree counter clockwise origin a(x,y) becomes a’(-y,x) meaning you switch the x and y and make the y negative
If it is perpendicular then the slope of it will be:

y = 1/3 x + b
-1 = (1/3)(3) + b
-1 = 1 + b
b = -2
The equation is: