X=3 and x=-9 solve by factoring
23 lines × 5 trees= 115 tree. or. 5 lines × 23 trees = 115 trees
F = 15%
v = 5%
0.15f + 0.05v = 0.14*10
15f + 5v = 140
3f + v = 28
f + v = 10 (total volume)
---------- Subtract
2f = 18
f = 9 liters of 15%
v = 1 liter of 5%
<span>angle = arcsin(5.5/200) = 1.575 degrees</span>
