Answer:
1.no, because 840 divide by 70 equals 12 and 12 does not equal 14
2.yes, because 480 divided by 30 does equal 16 and 16=16
3.yes, because 640 divided by 40 does equal 16 and 16=16
4.no, because 910 divide by 30 equals 30.333 and 30.333 does not equal 31
Step-by-step explanation: Hope this helps