When a conditional and its converse are true, you can combine them as a true
a. counterexample
b. biconditional
c. unconditional
d. hypothesis

Answer – B. Bioconditional
When a conditional and its converse are true, you can combine them as a true biconditional. A biconditional statement is said to be true when both parts have the same truth value, i.e. both the conditional and its converse are true.

Ithink that its like 15 mph.