Q&A - P5 Math

[Winx5015]

Hi MathIzzzFun,


Really appreciates your help. Thanks!

[linden2000]

MathIzzzFun:

Winx5015:

Hi MathIzzzFun,


Thanks for your tips to solve my questions, but still can't work out the answer for the last question. Can further enlighten me on this.

Thanks.

Hi

in the end, we have 5u + 130 = 3u + 245
2u = 245 - 130 = 115

Danny had 6u at first = 3 x 115 = 345

cheers.

Hi. So Danny had 345+26x6 =$501 at first ?

Many thanks.

[MathIzzzFun]

linden2000:

MathIzzzFun:

[quote=\"Winx5015\"]Hi MathIzzzFun,


Thanks for your tips to solve my questions, but still can't work out the answer for the last question. Can further enlighten me on this.

Thanks.

Hi

in the end, we have 5u + 130 = 3u + 245
2u = 245 - 130 = 115

Danny had 6u at first = 3 x 115 = 345

cheers.

Hi. So Danny had 345+26x6 =$501 at first ?

Many thanks.[/quote]o..yep..you r right.. thanks.. amended the post.

cheers.

[ozora]

Mr Lee bought some shirts for $425. if He was given a discount of 15%, he would be able to buy 5 more shirts for the same amount of money. What is the original price of shirt?

[small]

Hope this helps.


The value of 15% discount is :

$425 x 15 / 100 = $63.75

With this money, Mr Lee able to buy 5 more shirts.

5 shirts = $63.75
1 shirt = $12.75

As this $12.75 is the price of a shirt after 15% discount.

85% -> $12.75
100% - > $12.75 x 100/85 = $15

The original price of shirt is $15

p/s: think my my answer is incorrect.

.

[enoawng]

A florist sold twice as many roses as tulips and collected $400 in total. She collected $80 more on the tulips than the roses. Given that a tulip costs $2 more than a rose, find the cost of a rose.

[linden2000]

enoawng:

A florist sold twice as many roses as tulips and collected $400 in total. She collected $80 more on the tulips than the roses. Given that a tulip costs $2 more than a rose, find the cost of a rose.

(400-80)/2 = 160
so amt for roses is $160 and tulips $240, totalling $400

Using guess and check,
if cost of a tulip is $3, no. of tulips = 80,
cost of a rose is $1, no. of roses = 160

Actually don't quite like to use guess n check as it's more time consuming.
Are there more elegant and less time consuming alternatives, other than algebra ? Thanks!

[MathIzzzFun]

enoawng:

A florist sold twice as many roses as tulips and collected $400 in total. She collected $80 more on the tulips than the roses. Given that a tulip costs $2 more than a rose, find the cost of a rose.

Hi

first, find the total cost for roses and tulips respectively :
Total cost of roses = (400-80)/2 = $160
total cost of tulips = $400 - $ 160 = $240

The florist sold twice as many roses as tulips.. assume we put same number of flowers in each packet, we would have 1 packet of tulips and 2 packets of roses.

Now, each packet of tulips = $ 240
each packet of roses = $ 160 / 2 = $80

Since each tulip cost $2 more than a rose, number of flowers in each packet = (240-80)/2 = 80

So, number of tulips = 80, number of roses = 80 x 2 = 160

cheers.

[teddy7171]

Plz help!


Michael bought some apples and gave half of them to Jackson.
Jackson bought some pears and gave half of them to Michael.
Micheael threw away 25 pears that were rotten while Jackson bought for himself another 20 apples.
After that, the number of pears to apples Michael had were in the ratio of 1:4 and the number of pears to apples Jackson had were in the ratio of 1:2.
How many pears did Jackson buy?

TIA.

[tianzhu]

Hi


Hope this helps.

Best wishes.

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