Answer:
Step-by-step explanation:
d=18 yards
Radius is half of the diameter
<h3>
Answer:</h3>
3 mi/h
<h3>
Step-by-step explanation:</h3>
Let c represent the speed of the current. Then 9+c is Nathan's speed downriver, and 9-c is Nathan's speed upriver. He travels 16 miles each way, so his total time is given by ...
... time = distance/speed
... total time = time downriver + time upriver
For distances in miles, speeds in miles per hour, and time in hours, this is ...
... 4 = 16/(9 +c) + 16/(9 -c)
... 9² -c² = 4(9 -c) +4(9+c) . . . . . multiply by (9+c)(9-c)/4
... 81 -c² = 72 . . . . . . . . . . . . . . . simplify
... 9 = c² . . . . . . . . . . . . . . . . . . . add c²-72
... c = 3
The speed of the current in the river is 3 mi/h.
The required equation of line is:
Step-by-step explanation:
Given
m=-1
And point (2,-1)
The general form of slope intercept form of equation of line is:
Putting the value of the slope
To find the value of b, putting (2,-1) in the equation
Putting the values of b and m in equation
The required equation of line is:
Keywords: Equation of line
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