Math 7th grade
posted by catalina on .
1) of the dolls in mo's doll collection,
1/5 have red hair. of these 3/4 have green eyes. what fraction of Mo's dolls
collection have both red hair and green
eyes?
2) ( Use measurement conversions) find 1/2 of 1/4 of a gallon.
3) Cheryl is organizing her movie collection. if each movie casee is 3/4 inches wide, how many movies can fit in a 5 ft shelf.
can someone please explain and show me how they got their answers??? Thank you :)

1) Multiply:
1/5 * 3/4 = 3/20
2) Multiply as I showed you above.
3) Divide:
60/(3/4) = 60 * (4/3) = ? 
that would equal 45?

but why would you multiply and then divide?

I mean 80 not 45

No. The answer to number 3 is not 45. Multiply (60/1) * (4/3).
When we divide fractions, the divisor must be inverted and then multiplied.
http://www.mathsisfun.com/fractions_division.html 
so could you help me with number 2???

oh sorry my bad thank you ms.sue :))

You're welcome, Catalina.