Thursday

August 21, 2014

August 21, 2014

Posted by **danielle** on Thursday, April 25, 2013 at 12:39am.

- math hw (algebra) -
**Reiny**, Thursday, April 25, 2013 at 9:29amI visualize a right angled triangle with sides

y, 400-y, and hypotenuse 300

There will be large numbers , so here is a little trick

let x be multiples of 100

so we have

x, 4-x, and 3 as the sides of a right-angled triangle

x^2 + (4-x)^2 = 3^2

x^2 + 16 - 8x + x^2 = 9

2x^2 - 8x + 7 = 0

x = (8 ± √8)/4

= 2.7071 or 1.2929

but x was a multiple of 100

so one leg was 270.71 , the other 400-270.71 or 129.29 m

or

one leg was 129.29 , then the other leg was 270.71

check

270.71^2 + 129.29^2 = 89999.8 or appr 90000 = 300^2

**Related Questions**

MATH - 2.you are walking for 5 minutes. You walk a distance of 300 meters. What ...

math - help please 2.you are walking for 5 minutes. You walk a distance of 300 ...

Algebra - 1. Create the indicated algebraic expression. Use descriptive ...

Algebra 1 - A rectangular piece of art is 4 meters wide and 6 meters long. It is...

Math - The formula for the velocity of an object is , where v is the velocity of...

middle school math - A brick is dropped from the Empire State Building at a ...

statistics - the breaking distance of a Honda CRV can be approximated by a ...

algebra - The distance across a lake is 34 meters. What is the distance, h, ...

ipc - Arrange the following from the most work to the least. For each instance, ...

P&P - Peter is walking from the library to school at a rate of 40 meters per ...