Work shown above! Answer is
a = 5 b = -2 c = 0
The answer is 84 because of process priority
The answer to this is 2 nickles and 6 quarters
The angle x is half the sum of the intercepted arcs, PQ and NO.
... (1/2)(65° + 45°) = 55° = x° = m∠PMQ

the equation is the horizontal line which parts through (-5,6), since it has no slope.