I think that there would be 20 trucks because <span>6 + 10 + 14 + 15 = 45, </span><span>6 + 10 + 14 + 15 = 45, </span><span>45 + 45 = 90 </span>
She has 30 worms and 50 ants
a-20=w ----> a=w+20
a+w=80------> w+20+w=80 ------> 2w + 20 = 80 -----> 2w = 60
w = 30
a+30=80
a=50
X+y=70
x-y=30
x=30+y
30+y+y=70
2y=40
y=20
x+20=70
x=50
xy=(50)(20)=1000
Answer: 84 mm is MAYBE the answer.