Answer:
a. contrapositive because it's the converse and inverse. True.
b. converse because it's the reverse of conditional statement. True.
c. That is false so it's not converse, inverse, or contrapositive.
Answer:
t:

meaning any number can substitute t and it would be the same answer.
Answer:
−12s2+11st−2t2
Step-by-step explanation:
Hope this helps!