Answer:
m<Y = 19 degrees
Step-by-step explanation:
Complementary angles are a pair of angles whose sum is 90 degrees.
<X and <Y are complementary, therefore we can construct an equation with their sum and set it equal to 90 degrees.
[tex]X + Y = 90\\71 + Y = 90 \text{ // Subtract 71}\\71 + Y - 71 = 90 - 71\\Y = 19[/tex]
