#### Answer

true

#### Work Step by Step

RECALL:
(1) The symbol $\cap$ represents intersection of sets.
(2) The intersection of sets A and B is the set that contains all the common elements of A and B.
The elements that are common to the two given sets are 7 and 9.
This means that the intersection of the two given sets is $\left\{7, 9\right\}$.
Thus, the given statement is true.