Solve the formula for a, the acceleration due to gravity

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?

She was given that ∠a ≅ ∠edf, and has already proven segment (ab) ≅ segment (de). which pair of corresponding parts and triangle congruency method would not prove δabc ≅ δdef?

If the vertices of an ellipse are at (1, 5) and (1, -5) and (3, 0) is a point on the ellipse, what is the ellipse equation?