Since f(x) = 2x - 1, all you need is to replace x with (a+h)
So f(a+h) = 2(a+h) - 1 = 2a + 2h - 1
Answer is D
An octagon has 8 sides, a rotation of 45° (360°/8) will map the octagon onto its preimage. Answer is 8.
Cos x = 15÷17
because cos is adjacent side over hypotenuse.
