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C) Complementary, x = 12

Step-by-step explanation:

This angles are complementary because they add up to 90 (because of the square in the corner)

4x + 1 + 4x - 7 = 90

8x - 6 = 90

8x = 90 + 6

8x = 96

x = 12

complementary; x=12

Step-by-step explanation:

two angles who form a right angle (90°) are complementary. so,

90° would equal those two angle measures added together. make an equation then simplify.

90 = (4x+1) +(4x-7)

90 = 8x - 6

+6 +6

96 = 8x

÷8 ÷8

x = 12

deez nu tz

step-by-step explanation: