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 By: jlopez (offline)  Sunday, August 21 2011 @ 02:45 AM CDT (Read 1316 times)
jlopez

Hi

Can anyone be able to explain this problem, how to solve by using model?
I can't understand the ans-key's answer. It's very confusing.

Quincy and Mandy saved \$5748.40 altogether. 0.4 of Quiny's savings was \$431.50 more than 0.2 of Mandy's savings.
How much more money than Quincy dis Mandy save?

Thank you.

Newbie

Registered: 03/22/11
Posts: 3

 By: pkrdd (offline)  Sunday, August 21 2011 @ 03:18 AM CDT
pkrdd

Hi,

I will explain in words since I cannot draw model here

total savings of quency & Mandy = \$5748.40

if Quency savings are divided into 10 units and Mandy's savings are divided into 10 parts then

10 u + 10 p = 5748.40

u + p = 574.84

0.4 of quency savings is nothing but 4u of quency (4/10)
0.2 of Mandy savings is nothing but 2p of Mandy (2/10)

4u - 2p = 431.50
2u - p = 215.75
u + p = 574.84

3u = 790.59 (215.75 + 574.84)
u = 263.53 (790.59/3)
p = 311.31 (574.80 - 263.53)

Quency savings = \$2635.30
Mandy Savings = \$3113.10

Ans: Mandy saved \$477.80 more than Quency (3113.10 - 2635.30)

Hope this helps

Junior

Registered: 01/11/10
Posts: 16

 By: jlopez (offline)  Sunday, August 21 2011 @ 04:00 AM CDT
jlopez

Thanks pkrdd.

Newbie

Registered: 03/22/11
Posts: 3

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