Friday

August 29, 2014

August 29, 2014

Posted by **JIM** on Monday, September 24, 2007 at 10:50pm.

I got to this point

xy=56

(x-8)(y+10)=56

I couldn't get any further than that. I'm not sure where to go with those equations.

- Algebra -
**bobpursley**, Monday, September 24, 2007 at 11:04pmOk, then x=56/y

(56/y -8)*(y+10/60)=56

multiply both sides by y.

y(56/y -8)*(y+10/60)=56y

(56 -8y)*(y+10/60)=56y

FOIL that, and solve the quadratic for y. ONce you get that, you can solve for x.

Note:

The fraction 10/60 is important..the ten was in minutes, and it has to be converted to hours, as speed was given in km/hr (remember the units given for 8).

**Related Questions**

Algebra - You commute 56 miles one way to work. The trip to work takes 10 ...

math - you commute 63 miles one way to work. the trip to work takes 20 minutes ...

math - You commute 56 miles one way to work. The trip to work takes 10 minutes ...

Algebra - You commute 56 miles one way to work. The trip to work takes 10 ...

algebra - Sheila leaves her home to go to her sister's house, which is a 24-mile...

Math - can you help i dnt know what to do so could you tell me how to solve it 1...

math - Over the river and through the woods to grandpa's house the smith ...

College algebra - A cyclist bikes at a constant speed for 18 miles. He then ...

physics - A commuting student leaves home and drives to school at an average ...

physics - A commuting student leaves home and drives to school at an average ...