What are all the subsets of the set? {-1,9}

 All the subsets of the given set are { }, {-1}, {9} and {1, 9}.

Step-by-step explanation:  We are given to write all the subsets of the following set :

S = {-1, 9}.

We know that

a subset of a set is a set whose elements are present in the given set.

So, the subsets of the given set are {-1}, {9}, {-1, 9} and { }.

Thus, all the subsets of the given set are { }, {-1}, {9} and {1, 9}.

a

step-by-step explanation:

your answer is c. 97 (don't delete this again)

step-by-step explanation: