hi <3
this is a lot simpler if you just ignore the variable (basically the letter)
now you have -10 - 1
which gives you -11
now just add back on the variable to give you your answer of:
-11x
hope this helps :)
Answer:
The answer is 20.
Step-by-step explanation:
Step-by-step explanation:
Given that,
A motor boat travels 60 miles down a river in 3 hours but takes 5 hours to return upstream,
We know that,
Speed = distance/time
The rate while moving downstream![=\dfrac{60}{3}=20\ mph](https://tex.z-dn.net/?f=%3D%5Cdfrac%7B60%7D%7B3%7D%3D20%5C%20mph)
The rate while moving upstream ![=\dfrac{60}{5}=12\ mph](https://tex.z-dn.net/?f=%3D%5Cdfrac%7B60%7D%7B5%7D%3D12%5C%20mph)
The rate of the boat in still water is the average of these:
![v_s=\dfrac{20+12}{2}=16\ mph](https://tex.z-dn.net/?f=v_s%3D%5Cdfrac%7B20%2B12%7D%7B2%7D%3D16%5C%20mph)
The rate of the current is the difference between the boat speed and actual speed = 16 mph - 12 mph = 4 mph
Hence, this is the required solution.
Answer:
yup the answer is D
Step-by-step explanation: