Answer:
C = 17.50n + 10
Step-by-step explanation:
You can plug the numbers into the equation 'y = mx + b' to get your answer.
Answer: x = 9
The sum of three interior angles of a triangle is 180°.
(9x - 3) + (6x) + 48° = 180°
9x - 3 + 6x + 48 = 180
15x + 45 = 180
15x = 135
x = 9
option (D) is the right answer
