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Subject: Math homework help!
Posted by: GolfFreak
- [369582419] Thu, Jan 10, 2008, 21:57
Please help! Im lost. Cant remember how to get area. Please leave how you got anwser so I cant try to explain it back to my kid.
Lydia is putting photographs in an album. She does not like to leave more then 1/3 of a page uncovered.
all in inches
Album page height 6 3/4 width 9
photo A height 4 1/8 width 2 1/2
photo B height 3 5/8 width 4
photo C height 2 1/8 width 2 3/4
photo D height 2 1/8 width 2 1/8
1. Above are the dimensions of an album page and 4 photos. If Lydia puts these 4 photos on 1 page, what area of the page will be left uncovered?
2. Is this amount more then or less than 1/3 of the total area of the page?
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| 1 | Perm Dude
ID: 80311016
Thu, Jan 10, 2008, 22:02
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Area is height times width. I'd suggest converting these to inches to get total square inches for the album & each photo. Add up the photo inches, then subtract that total from the album total to get the amount left. This will answer #1.
Multiply that times three. If the result is less than the total album area then the answer to question 2 is less.
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| 2 | WiddleAvi
ID: 251113917
Thu, Jan 10, 2008, 22:06
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I am not doing it for you but area is height * width.
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| 3 | GolfFreak
ID: 369582419
Thu, Jan 10, 2008, 22:14
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So is the album page 60 3/4 inches total?
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| 4 | WiddleAvi
ID: 251113917
Thu, Jan 10, 2008, 22:16
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yes
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| 5 | WiddleAvi
ID: 251113917
Thu, Jan 10, 2008, 22:17
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the area is 60 3/4 inches
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| 6 | GolfFreak
ID: 369582419
Thu, Jan 10, 2008, 22:39
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Ugh. Having more problems. Is this correct?
(3 5/8 * 4) = (15/8 * 4/1) = (60/8) = (7.5)
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| 7 | StLCards
Dude
ID: 31010716
Thu, Jan 10, 2008, 23:03
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that is not correct
(3 5/8 * 4) = (29/8 * 4/1) = ((29*4)/(8*1) = (116/8) = 8 goes into 116 14 times with remainder 4, so answer is 14 4/8 = (14 1/2)
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| 8 | StLCards
Dude
ID: 31010716
Thu, Jan 10, 2008, 23:06
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to convert 3 5/8 into a fraction you multiply the denominator 8 by the whole number 3 and then add the numerator 5 so (8*3+5) = 29 and then you put that over the denominator of 8 so it is 29/8.
Hope that helps.
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| 9 | weykool
ID: 2842717
Fri, Jan 11, 2008, 12:24
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You know that (3 5/8 * 4) has to be more than 7.5 because 3*4=12.
If you then multiply the 5/8*4 you get 20/8 or 2 1/2, add that to 12 and you get 14 1/2.
Just another way of doing the problem.
You could also convert the fractions to decimals.
3.625 * 4 = 14.5
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