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Algebra
Tutor: None Selected Time limit: 1 Day

Michael and Kathryn bowl together and their combined total score for one game was 425 points. Michael’s score was 70 less than twice Kathryn’s. What were their scores? 
      
      
      
      
May 7th, 2015

M= Michael's score

K= Kathryn's score

We have:

1. M+K=425

2. M=2*K-70

Solving:

from the 1st:

K=425-M

Substitute in the 2nd: M=2*(425-M)-70

or:

M=850-2*M-70

M+2*M=850-70

3*M=780

M=260 (this is already telling us it's the 3rd choice above, but we'll check K anyway)

K=425-260=165

So indeed it's the 3rd choice.



May 7th, 2015

you the answer is this one Kathryn: 165, Michael: 260

May 7th, 2015

Yes

May 7th, 2015

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