what is the number of faces of a polyhedron if it has 6 vertices and 12 edges?

What is the emergency number in Americae a number is added to 9 less than twice that number,if the result is 180,what is the number? Five times a number is the same as the number added to five.What is the number? What is you number what is< > telephone number What is my number?( ) number is 8. 英语翻译if 17 more than a number is 5 more than three times the number,what is the number? if 4 less than 3 times a certain number is 2 more than the number,what is the number If 25% of a number is 324 less than 70% of the same number,what is the number? 英语翻译If f less than 3 times a certain number is 2more than the number,what is the number? If 1/5 of a number is 12,What is 3/10 of the same number? what's the number ( ) at the number and tell me what the telephone number is?( )应填什么 英语IQ题：What is the missing number?如图所示, what is the next number?2,3,5,9, what number is missing from the final box?（意思） number what's the is missing 连词成句 what is the next number? 151200 21600 2700 300