100÷2 [500÷5 {6+(21+7-24)}] can anyone ;(

I'm confused on this could anyone me and show me what i need to do to solve it.

Three people are traveling and need to exchange the currency of their native country for the currency of the country they are visiting. drag each exchange to the category that shows the ratio of currencies in that exchange.

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?