Monday, May 24, 2010

Math help............. dont understand these questions........?

A--- a recrd store is having a sale during wich all items will be sold at 25% less than their marked price . how much will a CD marked at $16 sell for ?


ok i kinda understand this question alittle bit and am not sure if this question has 1 step or two stpes








B---eric invested $5000 dollars in the stock market . the value of his stock increased by 13%.


a- what is the amount earned from this investment?i already know this answer it 5000 times .13 = 650.00 but the problem is this questin--


b-what is the new value of the stock this step that i dont no how to solve





C-express the % as a fraction with 100 as its denominator


a-40/100


b-55/100


c-62 and one half over 100





D-express the fraction as a percentage


a-3/5


b-29/40


c-5/4


and please please please show me how you solved them thank you soooooooooooooooooooo much for your help

Math help............. dont understand these questions........?
k 1st question


a recrd store is having a sale during wich all items will be sold at 25% less than their marked price . how much will a CD marked at $16 sell for ?


this is a goodway to lead to the next probs, 25% less is = to 1/4. so the price of the CD is being discounted by 1/4 the new price is then equal to 3/4 (4/4 - 1/4) so the answer would be








16$x3/4





(16/1)x(3/4)=48/4=12/1=12


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k 2nd question part B, the 5000$ he invested grew 13% so he has gained 650$, the new value of the stock is the original amount he paid plus the growth (5000+650)= 5650$ is the value of the stock


______________________________________...





a.40%=40/100=4/10=2/5





b. 55%=55/100=11/20





c. 62.5%= 62.5/100=625/1000= 5/8


______________________________________...





a. 3/5=6/10=60/100=60%





b. 29/40=72.5% (use a calculator and divide 29 by 40 then multiply by 100 to get the percent)





c.5/4= 125/100=125%
Reply:B---eric invested $5000 dollars in the stock market . the value of his stock increased by 13%.


a- what is the amount earned from this investment?i already know this answer it 5000 times .13 = 650.00 but the problem is this questin--


b-what is the new value of the stock this step that i dont no how to solve





since eric Earned/ Increased by 13% then you add $650.00 to $5000
Reply:A.





If the marked price is $16, then the sales price = 25% less so





sale price = (1-25/100)*16 = (3/4)*16 = $12





B.





New value is 5000 + (13/100)*5000 = (1+13/100)*5000 = 1.13*5000 = $5650





(in other words just add on the amount earned - $650 - to the original investment)





C.


They are already expressed as fractions with 100 as a denominator - perhaps the question is not copied right?





Perhaps they want them to be reduced so





a. 2/5


b. 11/20


c. 31/50





D.


Just multiply by a 100, so





a. (3/5)*100 = 60%


b. (29/40)*100 = 29*100/40 = 29*5/2 = 29*5/2 = 72.5%


c. (5/4)*100 = 500/4 = 500/4 = 125%
Reply:D take the denominator and divide it into 100 then take that answer and multiply the top figure by it in example





3/5 100 divided by 5 equals 20 therefore 20 multiplied by 3 equals 60 so the answer is 60%





hope that this helps
Reply:A..$16 X 25% (16 X .25) = 4


16-4=$12


Answer is $12





B....the new value of the stock would be $5650 Just added the interest to the old investment value.





C.....they are already in fraction form





D...60%


72.5%


125%





Just divide the numerator by the denominator
Reply:A)16/1.25= 12.8 $12.80


B)5000x1.13 = 5650


C)40/100= 2/5, 55/100 stays the same, 62.5/100=125/200


D)3/5=60%


29/40 =72.5%


5/4=125%
Reply:A- all you have to do is multiply .25 by 16.





B-???





C-what percent??





D-60%, 58%, 120%
Reply:A. 25% of $16 is $4. 25% off of the $16 is figured as $16 - $4 is $12.





B. You have the amount earned. Add this to the original value of the stock to get the present value of the stock. $5000 + $650 = $5650.





C. 40/100 = 40%


55/100 = 55%


62.5/100 = 62.5%





D. 3/5 -- 3 divided by 5 = .60, or 60%


29/40 -- 29 divided by 40 = .725, or 72.5%.


5/4 -- 5 divided by 4 = 1.25, or 125%
Reply:You can get the answer two differrent ways.


First sub tract 25% fro 100% getting 75%, then multiply .75 times $16 getting $12. Second way is to multiply 25% time 16 getting .25 times 16 = 4, and then subtract $4 from $16 getting $12





The new valuue of the stock is equal to the original value plus the increase in value which is simply $5000 + $650 = $5650





40/100 % = 0.4/100


55/100 % = .55/100


62.5/100% = 0.625/100





3/5 = 60/100 = 60%


29/40 = 72.5/100 =72.5%


5/4 = 1.25 = 125%
Reply:A. 16 - .25 = 12 dollars





B. 5000 x .13 = 650 therefore stock value is 5000 + 650


= 5650 dollars





C. 40/100 = 40% or .4 (divide 100 into 40)


55/100 = 55% or .55


62.5/100 = 62.5% or .625





D. 3/5 = 3 divided by 5 = 60%


29/40 = 72,5%


5/4 = 125%


in the last one you for example you could say


4 = 100%


5 = x %





then x % = 5 x 100 divided by 4 = 125 %

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