Final answer:
To accurately solve for the measure of angle c (m∠c), additional information is needed about the relationship between the angles. This information is not provided in the question, and hence the measure for m∠c cannot be determined.
Step-by-step explanation:
The question provided involves finding the measure of an angle in a geometry problem, specifically angle c (m∠c). To find the measure of angle c, we need more information about the relationship between angles a, b, and c. Typically, if the angles are part of a triangle or form a linear pair, we can use the fact that the sum of angles in a triangle is 180°, or that supplementary angles add up to 180°, to find the values of x and subsequently the measure of angle c. Without additional information about how these angles relate to each other, we cannot determine the correct value of m∠c from the expressions given for m∠a, m∠b, and m∠c alone.