Just started college algebra and I do not understand some of it, PLease help..? - XP Math - Forums

 XP Math - Forums Just started college algebra and I do not understand some of it, PLease help..?

 07-24-2007 #1 Mandalicious Guest   Posts: n/a Just started college algebra and I do not understand some of it, PLease help..? I have never been good at fractions.... 1.helen has 1/5 of her portfolio is u.s bonds, 1/8 in european, 1/10 in japanese, the remainder invested in manicipal bonds, what fraction is in manicipal bonds, and what percent is in manicipal bonds?2. forensic scientist uses expression 72.6 + 2.5T to estimate the height in centimeters of a female with a tibia of length T centimeters. If a female skeleton has a tibia of length of 32.4 cm, then what was the height of the person? Find the length of your tibia in centimeters, and use the expression from this to estimate the height.
 07-24-2007 #2 Jeremy L Guest   Posts: n/a 1- Always find a common denominator. Here we can use 40. So 8/40 + 5/40 + 4/40 = 17/40. Then 1-17/40=23/40 in municipal bonds. Just multiply the numerators and denominators such that the denomitors are 40.2- 72.60+2.5*32.4=153.6 cm. Just plug in for t.
 07-24-2007 #3 Justin B Guest   Posts: n/a For question number one, first we have to add together how much she has in u.s. bonds, european, and japanese bonds, in order to find out how many she has in manicipal bonds. In order to do that, we need a common denominator.That would be 40, because both 5, 8, and 10 can go into it evenly.1/5 = 8/401/8 = 5/401/10 = 4/40Add them and we get 17/40If the rest is in manicipal bonds, then subtract 17/40 from 40/4040/40 - 17/40 = 23/40To calculate that percentage, we just divide 23 by 40 and multiply by 100, and we get 57.5%2. Right here, all we have to do is substitute T into the expression. It says that her tibia length (T) is 32.4, so we get72.6 + 2.5(32.4)Simplify that and you have 153.6 cmThen just measure your tibia, and plug it into the formula.
 07-24-2007 #4 potterpotato12 Guest   Posts: n/a 1. 23/40i dont know the other 1 good luck
 03-07-2010 #5 jmw106462     Join Date: Feb 2010 Posts: 388 I don't understand none of that stuff. Sorry m8. __________________ Please refrain from sending me frivolous PM's
 03-07-2010 #6 jmw106462     Join Date: Feb 2010 Posts: 388 Wish, You goodluck thou In College. __________________ Please refrain from sending me frivolous PM's

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