A boat, which moves at 13 miles per hour in water without a current, goes 80 miles upstream and 80 miles back again in 13 hours. Find the speed of the current to the nearest tenth.

Speed of current is 3 miles per hour.

Step-by-step explanation:

Speed of boat without current, u = 13 miles/hr

Let speed of current = v miles/hr

Speed upstream = (13 - v) miles/hr

Speed downstream = (13 + v) miles/hr

Distance traveled upstream, = 80 miles

Distance traveled downstream, = 80 miles

Total time taken, T () = 13 hours

Formula for Total Time taken:

Time taken in Upstream:

Time taken in Downstream:

So, speed of current is 3 miles/hr

1d

2b

3 false

4 d

5 3200sq,ft

80+60+y=180

then divide the difference between 60 and y and add it to 180

so x =180 +( (y-60)/2)

x equals 200

step-by-step explanation:

8

it would be 6xy and -16xy.