Answer:
35°
Step-by-step explanation:
Complementary angles has a sum of 90°
m<A + m<B = 90°
2x + 23 + 4x -29 = 90° add like terms
6x - 6 = 90° add 6 to both sides
6x = 96 divide both sides by 6
x = 16 now replace the x in m<B = 4x - 29 with 16
4×16 - 29 = 35
