9mph because 20 minutes time 3 is one hour so multiply 3 by 3 to get 9
-349.3 i think u didnt show the answers we choose from /my answer probably wrong i was assuming.
Answer:
Its x=-10
Step-by-step explanation:
16. 4 (9*4=36)
17. 6 (6*11=66)
18. 8 (10*8=80)
19. 9 (9*5=45)
20. 48 (4*12=48)
21. 13 (13*2=26)
987.76 Hz please thank you