2 runners are racing against other. Jeri graphs a equation for each runner that shows the runner's distance from the starting li
1 answer:
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Imagine we drew a line from the centre (2,0) to the point (0,4).
Essentially the line<u> we drew from the centre to that point on the circle is perpendicular to the tangent line slope-wise</u>.
The <u>slope of that line from the centre to the point is -2</u> based on the slope's equation or formula.
slope =
Therefore the <u>tangent equation's slope is 1/2</u> since any perpendicular line's slope is the negative reciprocal of the original line's slope.
By<u> using the point-slope form, we must have the point on the tangent plane (0,4) and the slope we found which is 1/2</u>.
Hope that helps!
Answer: 1 hour
Step-by-step explanation:
Let the distance they walked be in time
and the distance they walked be
in time
,then
Walking speed=
Riding speed=
Also the total time taken=3 hours
∴...(1)
Since the total distance= 20 km
∴
Thus, the they spent 1 hour time in walking.