5n-4
Just plug numbers into it. Make this a table.
n 0 1 2 3
y 1 6 11 16
Recall the secant-tangent theorem, and you have
EA^2 = EC*CD
12^2 = 8*(x+10)
and now ED = EC+CD = 8+x+10
I suspect a typo somewhere in the murk above
For an even function f(x) = f(-x)
So its option A
The lines intersect at two places.
They intersect at approximately (-2,8) and (2,3)
Looking at the choices they would be at (1.8,3.2) and (-2.8,7.8)
The answer is D. Both A and B.
3 * 5/12 = 15/12 = 1 1/4 hrs total
