A fisherman can row 9 miles downstream in the same amount of time it takes him to row 3 miles upstream of the curent is 6 miles per hour, find how long it take shim to cover 12 miles

It will take 1 hour.

Step-by-step explanation:

Given,

Speed of current = 6 miles per hour,

Let x be the speed of boat ( in miles per hour ),

So, the speed of fisherman,

In downstream = (x + 6) miles per hour,

In upstream = (x-6) miles per hour,

Since

Thus, the time taken in 9 km downstream =

And, the time taken in 3 km upstream =

According to the question,

Thus, the speed fisherman is 12 miles per hour.

Hence, the time taken to cover 12 miles is 1 hour.

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33