Answer:
m∠A + m∠B = 130°
Explanation:
the interior angle measures of a triangle always add up to 180°. using this information along with the fact that a straight line is also 180°, we can infer that the measure of angle C is 50°. to find the sum of angle A and angle B, we will subtract 50 from 180. this gives us 130. so this means that the answer to your question is 130°. hope this helps you