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[tonykangus]

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Hi every one ,
Anybody know how to slove this question? Thank You.

Kim is 1/3 the age of her older sisiter Sue. In 13 years, Sue will be one year younger than twice Kim's age. How old is Sue?

A. 10

B. 12

C. 24

D. 36

E. 49

 

[luder98]

Hi every one ,
Anybody know how to slove this question? Thank You.

Kim is 1/3 the age of her older sisiter Sue. In 13 years, Sue will be one year younger than twice Kim's age. How old is Sue?

A. 10

B. 12

C. 24

D. 36

E. 49

K = S/3
2(K+13) - 1 = S + 13

Plug K into the second equation:

2S/3 + 26 - 1 = S + 13

or S/3 = 12

or S = 36

Edit: I want to add one thing to this type of calculation, try to solve with fraction as much as possible (if you are comfortable with). This will make it much simpler. In this case, you probably don't want to multiply everything by 3 for that will result so much larger numbers. Good luck.

 

[TX Hopeful]

luder98 pretty much laid it out for you, but if you need further explanation...Barron's lays out word problems pretty well for QR. In particular, there are a couple of problems similar to this one.

 

[shindrome]

you can pick numbers too! always start with B then move on to D. this is the most effective way from my understanding.

overall, luder98 explained it. i hated these type of problems...try to get comfortable with it by practicing! remember to study trig! i kinda half assed that part and god nailed with 4 questions on the DAT! good luck.

 

[tonykangus]

Anybody knows how to slove this questions? Thank You...
1. Waht volume of HCl was added if 20ml of 1M NAOH is titrated with 1M HCl to produce a pH=2?


2.How many Faradays are required for the reduction of 2mol of Fe3+ to Fe(s)?


3.If you ahve a solution of 1l of H2O and 234g of NaCl, What is the osmotic pressure at STP (R=0.1l*atm/mol*K)?


4.What is dentisty of amonia gas at 2.00atm pressure and 25.0 *C(R=0.1atm L/molK)?

 

[luder98]

You may not like my suggestion. But I want to help you. I think you should get a copy of Kaplan Blue Book and read through the material. Studying by targeting certain problems will not help you score high. The problems you have asked are pretty much covered by Kaplan. Good luck!