Use the distributive property to write
13y - (5x - 3y) + x without parentheses.

16y-4x

Step-by-step explanation:

first distribute the negative to the numbers in parentheses

13y-5x+3y+x

then combine like terms

13y+3y=16y

-5x+x=-4x

16y-4x

thus, the first answer choice, y = sec x, is the correct one

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.