Since each side is r times the side of ABC, then 30*r+40*r+60*r is the perimeter, which equals 130r (by separating it into r*(30+40+60) using the distributive property)
How much did he have in the first place ?
Answer:
5 goes into 100 twenty times, so 20% is the answer
hope it helps! :)
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Answer:
a balloon ?
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