Answer: x=158
Explain: 3 triangle corners = 180
180-90-68 = 22
Flat corner = 180
=> x=180-22=158
(x^2) - 16 / x+4 = (x-4)(x+4) / (x+4) = x-4, x not equal to -4
D is the answer.
Answer: FALSE
When you multiply an inequality by a negative number the inequality flips.
The equation of a circle:

(h,k) - the coordinates of the centre
r - the radius
A.) 5/162
the numerator is increasing by 1 and the denominator is being multiplied by 3 each time