now, we know the tangent line at (2,4) is y = 8x - 12, now, that's already in slope-intercept form, so, the slope of that tangent at (2,4) is "8" then.
now, that means when x = 2, the slope is 8, so let's use that.
Answer: b) 6
Step-by-step explanation:
Given : The illuminance of a surface varies inversely with the square of its distance from the light source.
i.e. for d distance and l luminance , we have
, where k is constant. (1)
If the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters.
From (1), we have
(2)
For the distance (d) corresponds to the illuminance to 30 lumens per square meter , we have
Put value of k , we get
Then , the number of meters should the distance of the surface from the source be increased= 12 meters- 6 meters = 6 meters.
X intercept is where the graph hits the x axis or where y=0
y intercept is where the graph hits the y axis or where x=0
3x-2y=-12
x intercept
set y=0
3x-0=-12
3x=-12
divide by 3
x=-4
x intercept is at x=-4 or (-4,0)
y intercept
x=0
0-2y=-12
-2y=-12
divide -2
y=6
y intercept is y=6 or (0,6)
xintercept: (-4,0)
yintercept: (0,6)
It would be 40% because those percentages added up would be 90
I don’t how to answer question