Christopher is 20 years younger than Ishaan. Ishaan and Christopher first met two years ago Fourteen years ago, Ishaan was 3 times as old as Christopher.

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?

In the geometric progression –3, 12, −48… what term is 3,072?

Which expression is equal to (f+g)(x)?