Which system is equivalent to 3x squared - 4y squared = 25 over -6x squared -2y squared = 11

Could someone with number 1 and 2

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

In a young single person's monthly budget, $150 is spent on food, $175 is spent on housing, and $175 is spend on other items. suppose you drew a circle graph to represent this information, what percent of the graph represents housing?