Sum means addition
negative 18 means -18
a number can be x
Sum of negative 18 and x should be 11
thus the equation is
Because the 2 sides of the triangle are identical, both are labeled as 7, then the 2 bottom angles, J & L are the same.
J = 25, so L also equals 25 degrees.
The answer is C.
You need to calculate the two zeros of the function. The first zero is the "start", the second zero is the "end" of the trajectory.
Well...
0 = x(-16x+80)
First zero is x=0 (the start of trajectory)
Second zero:
-16x+80=0.... x=5! (The end of the trajectory!)
Good luck!
M.