Wednesday

March 4, 2015

March 4, 2015

Posted by **joy** on Saturday, July 31, 2010 at 4:51am.

- math -
**Reiny**, Saturday, July 31, 2010 at 6:58amspeed of plane in still air --- x km/h

speed of wind ---- y km/h

speed of plane with the wind --- x+y km/h

speed of plane against the wind -- x-y km/h

first fact:

5(x+y ) = 3000

x+y = 600 #1 equation

second fact:

10(x-y) = 3000

x-y = 300 #2 equation

add #1 + #2, it becomes so easy.

- math -
**joy**, Saturday, July 31, 2010 at 11:21amspeed of a plane in still air is 450

speed of wind is 150

**Answer this Question**

**Related Questions**

Pre-Algebra - Question is: What is the algebraic equation to determine when they...

Pre-Algebra - Question is: What is the algebraic equation to determine when they...

Algebra 2 - An airplane flies 1050 km with the wind. In the same amount of time...

Math - An airplane has a speed of 400 km/h with no wind. The airplane flies 2140...

Algebra 1 - When a plane flies into the wind, it can travel 3000mi in 6 hr. When...

Math - An airplane flying at a speed of about 100 mph was once overtaken and ...

math - An airplane flying against the wind travels 100 miles in the same amount ...

Algebra: 8th Grade; Equation Check - 1) A private airplane leaves an airport and...

algebra - A Boeing 747 flies 2420 miles with the wind. In the same amount of ...

algebra - An airplane takes off from an airport and takes 6.5 hours to fly west...