Does anyone know how to do the "Birch and Swinnerton-Dyer conjecture" math equations?

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?

List the sides of δrst in ascending order (shortest to longest) if: m∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12

Secant be and cf intersect at point d inside a what is the measure of cde