Tony is using these numbers to make a new number.

13 1 5 8

-he can use brackets,+,—,x and / as often as he wishes.
-he cannot use any number more than once.
-he cannot use powers.
-he cannot put numbers together.

What is the biggest number he can make- show how he can make this number.

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.