Tan(angle) = opposite length/ adjacent length
Tan(50) = h/40
h = 40 x tan(50)
h = 47.67 or 47.7 feet
M = 3
Is that what you were looking for?
1 + (-5) becomes 1 - 5 because you are adding a negative number.
1 - 5 is -4
(40 * 25) + 0.10x = (40 * 20) + 0.20x
1000 + 0.10x = 800 + 0.20x
1000 - 800 = 0.20x - 0.10x
200 = 0.10x
200/0.10 = x
2000 = x <=== weekly sales must be $ 2000