Answer:
The answer is c: 75 degrees
Step-by-step explanation:
The interior angles of a triangle are equal to 180 degrees. Because angle m<B equal 60 degrees, angle< A and angle< C must equal 120 degrees (180-60). This means the 3x and 5x must equal 120 degrees. To find x you must make both terms equivalent. This means 8x=120. By dividing each side by 8, x ends up being 15. Now, it find m< C you must multiply 5 degrees and 15 degrees. This is because m< C is equal to 5x and x is equal to 15. 5(15) equals 75 degrees which is your answer.
