Monday

July 28, 2014

July 28, 2014

Posted by **Noelle** on Thursday, September 10, 2009 at 9:16pm.

- math -
**Reiny**, Thursday, September 10, 2009 at 9:30pmRicardo's present age --- x

Dorothy's present age --- x+6

product of their present ages = x(x+6)

6 years ago:

Ricardo x-6

Dorothy x

product of their ages then = x(x-6)

x(x+6) = 2x(x-6)

solve for x, sub into x+6

- math -
**MathMate**, Thursday, September 10, 2009 at 9:32pmLet D=age of Dorthy.

" Dorthy is 6 years older than Ricardo. "

Age of Ricardo = D-6

"The product of their present age"

D(D-6)

"is twice what the product of their ages was 6 years ago"

=2*((D-6)*(D-6-6))

Thus

D(D-6) = 2*((D-6)*(D-12))

Simplify and solve for D and reject the solution of D=6 because it is a trivial solution. Check the answer by substitution into problem data.

**Related Questions**

math - A. Brad is 12 years older than Sam . If Brad were 8 years older than he ...

math - Miriam is four years older than Ricardo. 10 years ago she was 3 times as ...

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

maths - A woman is now 4 times older than her daughter.Six years ago,the product...

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

math - i never can do word problems....please help... i got 7 of them.....these ...

Math... - Jennifer is 6 years older than Sue. In 4 years, she will be twice as ...

9th grade math word problems - i never can do word problems....please help... i ...

Math - 2x represents that Clyde is twice (2 times) as old as Bonnie. 6 years ...

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