Answer:
4(6x-7)
Step-by-step explanation:
From the question, we know that the solutions of the system

is (14,6), which means the speed of the the boat in calm water,

, is 14

, and the speed of the current,

, is 6

. To summarize:

and

We also know that w<span>hen the boat travels downstream, the current increases the speed of the boat; therefore to find the speed of the boat traveling downstream, we just need to add the speed of the boat and the speed of the current:
</span>



<span>
Similarly, to find the the speed of the boat traveling upstream, we just need to subtract the speed of the current from the speed of the boat:
</span>



<span>
We can conclude that the correct answer is </span><span>
C. The team traveled at 8 km per hour upstream and 20 km per hour downstream.</span>
Answer: B) Comparison Postulate
This is the idea where if we had two numbers A and B, then we have the three possibilities
We can only pick one item that is true at a time.
In this case, 3+2 simplifies to 5, so 3+2 = 5 is true while 3+2 > 5 is not true.
3+2 > 5 simplifies to 5 > 5, and there's no way a number is larger than itself.
Valentino because 2/4 is a half and 5/8 is bigger than a half.