Angles<span> larger than a right </span>angle<span> and smaller than a straight </span>angle<span> (between 90° and 180°) are </span>called<span> obtuse </span>angles<span> ("obtuse" meaning "blunt"). An </span>angle<span> equal to </span>12<span> turn (180° or π radians) is </span>called<span> a straight </span>angle<span>.</span>
I got F^-1(x) = x/4 + 4/9.
I believe the answer is B.
The answer to this would be C because you can multiply everything by 3 and still have a consistent-dependent system.
<B+<D = 180
x+148 = 180
x = 32
<A = 2(32) + 1
<A = 64+1
<A = 65