Answer:
Lines BC and F represent perpendicular lines
Step-by-step explanation:
we have
<em>Line BC</em>

the slope of the line BC is 
<em>Line F</em>

the slope of the line F is 
we know that
If two lines are perpendicular, then the product of their slopes is equal to -1
so

we have
-----> slope line BC
-----> slope line F
Find the product of their slopes

therefore
Lines BC and F represent perpendicular lines
Well i atleast know its not 10 lol
24 + 4 = 28
14 • 2 = 28
11 • 2.57 = about 28
Hope this helps a little!
2x + 2*(2x-5) = 38 is the equation
solving it
2x + 4x - 10 = 38
6x = 48
x = 8
(-25) + 10 + (-5) = -20 feet is his current position. To reach zero, he should add 20 feet to his altitude.