Combined, the trains cover ( 80 + 60) = 140 miles per hour
280 miles wil be covered in two hours.....when the trains meet it will be 5:00
3/8ths are blue or green
4/7 of the 3/8ths are green
4/7 * 3/8 x = 5/8 * x - 138
x = 336 beads in all
y = -7x-11 from the second equation use this value for 'y' in the second equation to solve for 'x'
then use this value of 'x' in either of the equations to find the 'y' coordinate.....
None, I think?
Sorry...... that should be 16 values....I put the correct answer in the other post too....
16 values.....
.... 428 .....
2600/(6.25) = 416 m/hr
2600/4 = 650 m/hr
(416 + 650)/2 = 533 m/hr speed in still air
533-416 = wind speed = 117 m/hr
{ (4* 47 )+( 61 * x) } / (4+x) = 50 solve for 'x' hours
33715 - 27155 = difference in cost = 6560 dollars
Difference in cost per mile 18 - 13 = 5 cents/mile
6560/.05 = 131,200 miles until equal
