Monday

September 15, 2014

September 15, 2014

Posted by **aldwin** on Tuesday, October 25, 2011 at 1:38am.

- math -
**Anonymous**, Tuesday, October 25, 2011 at 3:12amx + 11 = ( 1 / 2 ) ( x - 13 ) ^ 2

x + 11 = ( 1 / 2 ) ( x ^ 2 - 2 x *13 + 13 ^ 2 )

x + 11 = ( 1 / 2 ) ( x ^ 2 - 26 x + 169 )

1 / 2 ( x ^ 2 ) - 13 x - x + 169 / 2 - 11 = 0

( 1 / 2 ) x ^ 2 - 13 x - x + 169 / 2 - 22 / 2 = 0

( 1 / 2 ) x ^ 2 - 13 x - x + 147 / 2 = 0

The exact solutions are:

7

or

21

- math -
**Anonymous**, Tuesday, October 25, 2011 at 3:15amIn 11 years, the age of Russel will be half of the square of the age he was 13 YEARS AGO.

For that reason present age = 21

**Answer this Question**

**Related Questions**

Mathematics - In 11 years, the age of Russel will be half of the square of the ...

Mathematics-please help quick!! - Harry is twice as old as Doyle. Doyle's age is...

Algebra (Age Problem) - Five years ago Rico's age was half of the age he will be...

Math - Application of Quadratic Equations. A girl's age in 12 years' time is the...

math - A. A woman was 30 years old when her daughter was born.Her age is now 6 ...

Math - The sum of John's age and twice of his son's age is 56. In 8 years time, ...

Math - Sheila's age is two years more than twice Nicole's age. The sum of their ...

vivekanand H s SCHOOL - the difference of ages between 2 sisters is 10 years, 15...

math - 1. Lisa is 15 years old and her father is 40. How many years ago was the ...

Math - John's present age is five years more than thrice the present age of his ...