Matt measured the angles of a triangle to be 60, 45, and x. what is the measure of the missing side?

75°

Step-by-step explanation:

60°+45°+x=180°(by sum of angle)

105°+x=180°

x=180°-105°

x=75°

what are ur choices?

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.