Answer: First, we can tell that the straight line ray is worth 180 degrees so we can set up the equation 180 = (13x - 27) + (4x + 3). Combine the two expressions to get 180 = 17x - 24. Add 24 on both sides in order to isolate the x-value. 204 = 17x. Divide both sides to isolate x so 204/17 = 12. Essentially x = 12. Now, just plug in 12 into x in 4x + 3. 4(12) + 3 =
48 + 3 = 51. Since there is an indication of a right angle, subtract 51 from 90. 90 - 51 = 39. To find the y-value set the remaining degree of 39 equal to the y-value equation. So, 39 = 7y + 4. Subtract 4 from both sides so now you have 35 = 7y. Divide 7 from both sides to isolate y. Now we have figured out that y = 5.
