Select the lines that represent functions

B,D,E

Step-by-step explanation:

The vertical line  test states that a graph represents a function if and only if any vertical line through out its domain  intersect the graph at most once.

Keeping in mind the above, we find that graph A vertical line cuts at all points. Hence not a function

B,D are E are functions since any vertical line cuts only once

C cannot be a function since at x=4 the vertical line cuts at 3 places of the graph.

So answer is

functions are

B, D and E

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.