Answer:
<b = 23°
Step-by-step explanation:
<a and <b are complementary so they add up to 90
<a + <b = 90
Where <a = 67
67 + <b = 90
<b = 90 - 67
∠b=23°
∠a+∠b=90°
67°+∠b=90°
Subtract 67° from both sides
