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Klio2033 [76]
2 years ago
5

What are the solutions to equation (x - 21)^2 = 25? x= x=

Mathematics
1 answer:
melomori [17]2 years ago
8 0

The answers for these solutions to equation (x - 21)^2 = 25 are

x = 26

x =16

Picture proof

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I don’t understand the concept of this problem
maxonik [38]

Answer:

This uses the method of elimination/addition.

Step-by-step explanation:

1 (9x + 7y = 15)

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9x + 7y = 15

+ -35x - 7y = 63 <— add both of the equations

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5 0
3 years ago
"A rectangle has a height of 5 cm and its base is increasing at a rate" of 3/2 cm/min. When its area is 60 cm2, at what rate is
sukhopar [10]

Answer:

The diagonal is increasing at the rate of 119/104cm/min of the given rectangle.

Step-by-step explanation:

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Height = 5cm

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Area = 60cm^2

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b*h = 60

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b = 12cm

Applying Pythagoras theorem while drawing a diagonal to the rectangle

  b^2 +h^2 =  D^2\\

 5^2 +12^2 = 13^2

so our diagonal will be 13cm  

Upon differentiating the area of the rectangle  we get

b*h = A=60cm^2

using  the chain rule of differentiation

h*db/dt + b*dh/dt  = 0

b*dh/dt = -h*db/dt

12*dh/dt = -5*3/2

dh/dt = -5/8 cm//min

so the height of the rectangle is decreasing at the rate of -5/8cm/min

now we have all the measurements we need

b = 12 , db/dt = 3/2cm/min

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b^2 +h^2  = D^2

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2b*db/dt + 2h*dh/dt = 2D*dD/dt

b*db/dt + h*dh/dt = D*dD/dt

12*3/2 + 5*(-5/8) = 13*dD/dt

18 -25/8 = 13*dD/dt

\frac{144-25}{8} = 13*dD/dt

dD/dt = \frac{119}{104} cm/min

Therefore the diagonal is increasing at the rate of 119/104cm/min of the given rectangle.

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3 years ago
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Answer:

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Step-by-step explanation:

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2 years ago
There is a bag with 50 popsicles inside. 5
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Answer:

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Step-by-step explanation:

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Sam has 15 identical rectangular windows in his home. The length of each window is
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