A figure displays two nonadjacent angles with measures 3x and (4x + 1) if the angles are complementary what is the simplified equation corresponding to the measures of the angles

A. (1x + 1) = 180

B. (1x + 1) = 90

C. (7x + 1) = 180

D. (7x + 1) = 90

If the two angles are complementary, their measures must add up to 90 degrees.

Therefore, the equation corresponding to the measures of the angles is:
3x + (4x + 1) = 90

Simplifying this equation, we get:
7x + 1 = 90

Thus, the simplified equation corresponding to the measures of the angles is:
(7x + 1) = 90

Therefore, the correct answer is D. (7x + 1) = 90.