Answer:
21 is 35% of 60
Step-by-step explanation:
35% can be written as 0.35
0.35x = 21 ----- 0.35 times a number is 21
divide both sides by 0.35:
x = 60
You check if it is even and that the sum of the digits is divisible by 3. That's the divisibility rule of 6.
55t+285t=1020 combine like terms on left side
340t=1020 divide both sides by 340
t=3 hours
However that t is for the amount of time spent on the train and the same amount of time spend on the plane. So the total time for the trip is 2 times t, which is:
6 hours.
