Question

Help will mark brainliest.......................................

Answer 1

When solving problems like this, opposite angles will be equal to 180 when added together. So, when solving for C, you need to find x. You can do this by adding angles D and B.
3x + 9 + 2x - 4 = 180.
3x +2x + 9 - 4 = 180
5x + 5 = 180
5x + 5 - 5 = 180 - 5
5x = 175
5x/5 = 175/5
x = 35
Now, fill in x in angle A and C.
2x + 3 + C = 180
2(35) + 3 + C = 180
70 + 3 + C = 180
73 + C = 180
73 - 73 + C = 180 - 73
C = 107
The angle measure of angle C is 107. Hope this helps!

Answer 2

I'm not gonna give the answer because you have to solve it. Sorry. But I'll help you get it.

Step 1: solve the equation for each angle
Step 2: Add the totals from each angle
Step 3: Divide the total by 360
Step 4: You got your answer

I hope this helped! I'm sorry I answered really late.