21.1 should be the correct answer because 4.5% of 2000 is 90
(-2,3) to (2,-3)
6^2 + 4^2 = c^2
c = 7.21
————
(-2,3) to (1,5)
2^2 + 3^2 = c^2
c = 3.61
————
3.61 * 7.21 = approx. 26.03
The area is 26.03un^2
Number of red marbles in bag = r. b = 10-rProbability of first marble being red: r/10Second marble being red: (r-1)/9total probability = 2/15 = (r-1)*r/90r = 4b = 6
Answer:

Step-by-step explanation:
The area of a rectangle formula is length times width.
The length of this rectangle is
, and the width of this rectangle is 
Thus, the area of the rectangle is
. This can be expanded using FOIL.
First 
Outer 
Inner 
Last 
The two x terms combine, making 8x, and the answer is 
One solution BECAUSE they only intersect once!
Many solutions means they are on top of each other
No solutions means they are parallel to each other!