The area of a parallelogram is just:
A=bh, we are given b=3ft, so b=36in and A=324in^2 so
324=36h dividing both sides by 36
h=9
So the height is 9 inches.

The appropriate choice is
... D) x = -2 ±√7
It’s 6 because mark has 16 right and max read half of mark’s book so max has 8 because 8x2 =16 so I added 16 + 8 = 24 and 24x 6 = 144
You can find the slope of an equation by looking at what number comes before x. Making the slope being -1/2 because that's the number that comes before x.
1) 2m - 16 = 2m + 4
2m - 2m = 4 + 16
0 = 20 (no solution)
2) -4(r + 2) = 4(2 - 2r)
-(r + 2) = 2 - 2r
-r - 2 = 2 - 2r
-r + 2r = 2 + 2
r = 4
3) 12(5 + 2y) = 4y - (6 - 9y)
60 + 24y = 4y - 6 + 9y
60 + 24y = 13y - 6
24y - 13y = -6 - 60
11y = -66
y = -6