Let x be the speed of the slower plane, in km/h. Then the faster plane travels at x+40.
[2 hrs at speed x] + [(2 hrs - 1/2 hour) at speed (x+40)] = 2860(2x) + (1.5)(x+40) = 2860 solve for xx=800x+40=840
Plane 1 800 km/h
Plane 2 840 km/h
Answer:
D. All if the choices , credit cars , banks and issuer banks
Answer:
4n (3n - m)
Step-by-step explanation:
See what they both have, pull it to the outside, put what is left inside.
4n (3n - m)
