S=d/t ⇒d=s*t
s=speed
d=distance
t=time
The first train :
d=x
x=70 miles/h*t ⇒ x=70t (1)
The second train
d=360 miles - x
360 miles - x=80 miles/h*t ⇒360-x=80t ⇒ x=360-80t (2)
therefore, with the equations (1) and (2) we have a systeme of equations:
x=70t
x=360-80t
we can solve this system of equations by equalization method.
70t=360-80t
70t+80t=360
150t=360
t=360/150=2.4 (≈2 hour 24 minutes)
Answer: the first train meet with the second train in 2 hour 24 minutes.
Answer:
7 / 20 | 7 Out of 20 | 35%
Step-by-step explanation:
Answer:
$1.60 per pen
Step-by-step explanation:
60-30=30
30-13= 17
17-9=8
8/5= 1.6
Answer:
203.75
Step-by-step explanation:
815 ÷ 4 = 203.75
33 ÷ 3/4 = 33 × 4/3 = 44. The answer is solved by using this equation
