Answer:
B. quadrant IV, sin 0 = -3/5
Step-by-step explanation:
The answer would be -12
20 = 8x + 4r can be rewritten in multiple ways.
1. Reduce the coefficients: 5 = 2x + r
or
2. Solve for r: r = 5 - 2x
5 - r
3. Solve for x: x = -----------
2
it is 1 be ause they do not go into each other
