Given,
The total distance travelled is 476 miles.
The time taken by the boat for upstream is 14 hours.
The time taken by the boat for downstream is 34 hours.
Consider, The speed of the boat is B miles/hour.
The speed of the current is C miles/hour.
The speed at downstream is B+C miles/hour.
The speed at upstream is B-C miles/hour.
The formula of speed is,
For downstream,
For upstream,
Adding equation (1) and equation (2) then,
Substituting the value of B in equation (2),
Hence, the speed of current is 10 miles/hour and speed of boat is 24 miles/hour.
A.) 200+15m=395. This is because the initial price is 200, and after that she will add $15/month. The equation you chose would be exponential, meaning the rate would increase as time passed, which is not the case. Instead, the rate is constant, and the only think that changes is m, the number of months.
b.) I believe it will be easier to answer with ^this equation.
c.) The rate of change would be 15, since the rate is increasing monthly by $15.
d.) Once you solve 209+15m=495, you'll have the answer.
B. The equation can become -2(4x-1)=12 by applying the addition property of equality.
It took 8 weeks because follow 15 to the dot then go down and you see the answer
24 is the answer you are looking for