Answer:
3x-2
Step-by-step explanation:
Answer:
Step-by-step explanation:
Hello : let A(XA,YA) B(XB,YB)
the slope is : (YB - YA)/(XB -XA)
Answer:
(2, 1)
Step-by-step explanation:
The solution is the point where the two lines intersect. In this case, that is (2, 1)
For A it is 6240 / 20% for B it is 6240 x 15%
Height of the woman = 5 ft
Rate at which the woman is walking = 7.5 ft/sec
Let us assume the length of the shadow = s
Le us assume the <span>distance of the woman's feet from the base of the streetlight = x
</span>Then
s/5 = (s + x)/12
12s = 5s + 5x
7s = 5x
s = (5/7)x
Now let us differentiate with respect to t
ds/dt = (5/7)(dx/dt)
We already know that dx/dt = 7/2 ft/sec
Then
ds/dt = (5/7) * (7/2)
= (5/2)
= 2.5 ft/sec
From the above deduction, it can be easily concluded that the rate at which the tip of her shadow is moving is 2.5 ft/sec.