Answer:
see analysis
Step-by-step explanation:
this problem examines the transformation of If-then form
1:if ×=3.9×+5=23
2:if today is friday tommor is weekend
3:if you are in a band, you play the drums.
4:if the two angles are right angles, they are supplementary angles.
5:if people are registered, they are allowed to vote
l hope it help