3a + a - 15 = 225 . your substituting b(a-15) into the first equation. <span />
Answer: the two trains will meet in 2.8 hours
Step-by-step explanation:
Step 1
Speed of train A = 90mph
Speed of train B = 110 mph
Since both trains are travelling towards each other
, their effective speed will be= 90 mph + 110mph= 200mph
Step 2
we know that Speed = distance / time
therefore Time = Distance / speed
Distance = 560 miles
Speed = 200 mph
Time = 560miles / 200mph
2.8 hours
810
.....+27+31+35+39+43+47+51+55+59+63+67+71+75+79
The answer is 2 duh but it also equals window :)
