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22 May 2007, 11:38
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Before you spend too much time on this one - be warned - I don't think the correct answer is amoung the choices; I could be wrong.
Together Andrea and Brian weigh p pounds. Brian weighs 10 pounds more than andrea. Brian and Andrea's dog, Cubby, weighs p/4 more pounds than andrea. In terms of p what is Cubby's weight in pounds?
a (p/2) -10
b (3p/4) -5
c (3p/2)-5
d (5p/4)-10
e 5p-5
Together Andrea and Brian weigh p pounds. Brian weighs 10 pounds more than andrea. Brian and Andrea's dog, Cubby, weighs p/4 more pounds than andrea. In terms of p what is Cubby's weight in pounds?
a (p/2) -10
b (3p/4) -5
c (3p/2)-5
d (5p/4)-10
e 5p-5
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22 May 2007, 11:54
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gmatiscoming
A+B=P
B=A+10
B+C=A+P/4
2A+10=P A=(P-10)/2
C=(P-10)/2+P/4-(P-10)/2-10
C=P/4-10
22 May 2007, 12:17
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gmatiscoming
A + B = P
B = A + 10
C= A + P/4
By substituting B in the second equation into the first equation, we get:
A + A + 10 = P ==> 2A + 10 = P ==> A = (P-10)/2
Substitute this A into the third equation
C = (P-10)/2 + P/4
Multiply the first value by 2 to get common denominators
C = (2P-20)/4 + P/4
Multiply both sides by 4
4C = 2P-20 + P
4C = 3P-20
C = 3P/4 - 5
Answer : B
