Someone ! choices: a: 35 b: 135 c: 45 d: 55

The exterior angles of any polygon add to 360 degrees.

If we call the interior angles A,B,C,D,E that means

(180-A) + (180-B) + (180-C) + (180-D) + (180-E) = 360

5(180)-360 = A+B+C+D+E

A+B+C+D+E = 540 degrees

So we know the indicated interior angles add to 540.

90 + 148 + 3x + x+10 + 112 = 540

4x + 360 = 540

4x = 180

x = 45

Choice C: 45

step-by-step explanation: