(-7)*(2/5 + (-3/7))
= -14/5 + 3
=1/5
sub B = (x,y)
midpoint= ( (x-2)/2, (y+2)/2 )
(x-2)/2=1 and (y+2)/2=0
x-2=2 and y+2=0
x=4 and y= -2
B= (4,-2)
Answer:Jane is 16.5in. taller than Jim.
Step-by-step explanation:
Answer:
<h2><em>
112cm²/sec</em></h2>
Step-by-step explanation:
Area of a square is expressed as A = L² where L is the length of one side of the square.
The rate of change of area will be expressed using chain rule as;
dA/dt = dA/dL * dL/dt where;
dL/dt is the rate at which the side length of the square is decreasing.
Given L = 7cm, dL/dt = 8cm/sec and dA/dL = 2L
dA/dL = 2(7)
dA/dL = 14cm
Substituting the given value into the chain rule expression above to get the rate of change of the area of the square, we will have;
dA/dt = dA/dL * dL/dt
dA/dt = 14cm * 8cm/sec
dA/dt = 112cm²/sec
<em>Hence, the rate of change of the area of the square when the side length is 7 cm is 112cm²/sec</em>
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