I need help asap I'm trying to watch grey's anatomy after I'm done w my work ‍♀️

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of