SOLUTION: Within 11 years, the age of Peter will be half the square of teh age he was 13 years ago. Calculate the current age of peter.

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: Within 11 years, the age of Peter will be half the square of teh age he was 13 years ago. Calculate the current age of peter.       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 304033: Within 11 years, the age of Peter will be half the square of teh age he was 13 years ago. Calculate the current age of peter.
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
P%2B11=%281%2F2%29%28P-13%29%5E2
P%2B11=%281%2F2%29%28P%5E2-26p%2B169%29
2%28P%2B11%29=%281%2F2%29%282%29%28P%5E2-26p%2B169%29
2P%2B22=P%5E2-26p%2B169
0=P%5E2-28p%2B147 -7 and -21
%28P-7%29%28P-21%29=0
P=7,21 cant be 7 as 13 years from 7 is negative
so peter is highlight%2821%29
checking
21%2B11=32
32=%281%2F2%29%2821-13%29%5E2
32=%281%2F2%29%288%29%5E2
32=%281%2F2%2964
32=32
correct