X+y=-4 -x+2y=13 can someone me with this i dont understand this

For the equations below which statement is true ?

What is the reflection image of (5,-3) across the line y = -x?

Suppose that an airline uses a seat width of 16.516.5 in. assume men have hip breadths that are normally distributed with a mean of 14.414.4 in. and a standard deviation of 0.90.9 in. complete parts (a) through (c) below. (a) find the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.516.5 in. the probability is nothing. (round to four decimal places as needed.)