Help me with 11 and 13 please

11)
F(x) = 3x + 27
0 = 3x + 27
-3x = 27
-x = 27/3
-x = 9
x = -9

13)
F(x) = x^2 - 2x
0 = x^2 - 2x
0 = x (x - 2)

That’s all I can do for 13, sorry

Ithink number to is 1 inch=5 miles

I'm a bit puzzled here because they did not provide you with any measures of the other angles, so i am unable to provide a theorem or postulate to support my answer, but i'd say 90 degrees because it looks closer to a right angle than anything.