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DerKrebs [107]
3 years ago
7

Find the value of y,if (-4+y)=-7step by step​

Mathematics
1 answer:
lara31 [8.8K]3 years ago
6 0

Answer:

(-4+y)=-7

-4+y=-7

by adding 4 on both sides, we get

-4+4+y=-7+4

y=-3

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The altitude of a triangle is increasing at a rate of 1 cm/ min while the area of the triangle is increasing at a rate of 2 cm2
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Ya, calculus and related rates, such fun!




everything is changing with respect to t

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area will be da/dt which is increasing at 2cm²/min
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base=db/dt

alright

area=1/2bh
take dervitivie of both sides
da/dt=1/2((db/dt)(h)+(dh/dt)(b))
solve for db/dt
distribute
da/dt=1/2(db/dt)(h)+1/2(dh/dt)(b)
move
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divide by h
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ok
we know
height=10
area=100
so
a=1/2bh
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100=5b
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so
h=10
b=20
da/dt=2cm²/min
dh/dt=1cm/min

therefor
(2(2cm²/min)-(1cm/min)(20cm))/10cm=db/dt
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(-16cm²/min)/10cm=db/dt
-1.6cm/min=db/dt

the base is decreasing at 1.6cm/min
4 0
3 years ago
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