Which equation represents the relationship of the measure of m∠X and m∠Y?
m∠X = m∠Y
m∠X + m∠Y = 90°
m∠X + m∠Y = 100°
m∠X + m∠Y = 180°

In the pendulum formula t=2pi. read the problem on the picture ! ; $; $; ! ; ! ; ! ; )$; ! ; ! ; ! ; $; $; $! ; ! ; ); $; $$

Tcan be concluded that % of the seniors would prefer to see more candid pictures in this year's edition of the yearbook.

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?