Answer:
A. is correct answer
Step-by-step explanation:
full explanation
Can someone help me with this question
2 answers:
Answer: the second answer
Step-by-step explanation:
If we want to find an inequality with no solution, that means we can expect no x and an unbalanced inequality (e.g., 3<0 which is untrue).
The second one is like that because the inequality is
3+4x2(1+2x)
If we solve it out, we get
3+4x2+4x
When you remove the variable from both sides, you now have
32
This statement is false, since 2 will never be greater than 3.
If we look at the others, we can see that there are answers for all of them.
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Answer:
The trains will meet in 3 hours.
Step-by-step explanation:
The initial distance between the trains was 710 km, but since the cargo train started an hour before the passenger train, it has already covered some distance towards it. The distance the cargo train has covered is simply the product of its speed and the time taken
:
So the distance left between the trains is the starting distance minus this distance:
Now both trains are travelling towards each other, this means the rate at which the distance that is being covered is equal to the sum of the speeds of the trains:
Now that we have the speed, it is easy to calculate the amount of time it will take for the trains to meet:
Thus the cargo train and the passenger train will meet in 3 hours.