Eco-team

In one elementary school, the student eco-team made a promise to plant a total of 78 trees during the three spring months, because their school is celebrating its 78th anniversary since its opening. In the second month, they planted half as many trees as in the first month, and in the third month, 40% more than in the first month. How many trees did the eco-team plant each month?

Final Answer:

a =  20
b =  30
c =  28

Step-by-step explanation:

n=78 r=100%+40%=1+10040=1.4  a+(a+a/2)+r a=78 a+(a+a/2)+1.4 a=78  7.8a=156  a=7.8156=20  a=20
b=(a+a/2)=(20+20/2)=30
c=r a=1.4 20=28



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