Answer:
97.7
Step-by-step explanation:
LCM of 20, 30, and 40
LCM = 120
they would cry together for the first time in 120 minutes.
a. (-6/2)*(1/3)*(36/2)=-18; b. (125/100)*(-2/2)
7. 1/4 of 84 is 21, then 1/3 of that is 7