point e is located at (-5.2) point m is the reflection of point e across the y-axis what is the distance between e and m

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?

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)

How do you figure out which order to do two step equations in? like which thing do you subtract/add/multiply/divide first? i understand that you do the opposite of whatever's shown on the opposite side, but when?