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a_sh-v [17]
3 years ago
11

The quotient of z and 4 please help me.

Mathematics
1 answer:
MAXImum [283]3 years ago
3 0
"The quotient of z and 4"
is the same as saying
"z divided by 4"

z/4
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Twenty-five subtracted from a number is -50. what is that number?
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the answer is

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Vikki [24]

Answer:

Height: 3/2 inches

Length:  12 inches

Width: 4 inches

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Let x is the side length of the square

The height of the box by cutting squares off :x

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  • The new width of the cardboard = 7 -2x (because we cut from 4 corners)

The new volume of it is:

V = (15 -2x) (7 -2x) x

<=> V = 4x^3 -44x^2 +105x

To maximum volume, we use the first derivative of the volume

\dfrac{dV}{dx} = 0

<=> 12x^2-88x+105=0

<=> \left(2x-3\right)\left(6x-35\right) = 0

<=> 2x -3 = 0 or 6x -35 = 0

<=> x = 3/2 or x = 35/6

To determine which value of x gives a maximum, we evaluate

\dfrac{d^2V}{dx^2} = 24x -88

  • If  x = 3/2, we have:

\dfrac{d^2V}{dx^2}= 24(3/2) -88  = -52

  • If x = 35/6, we have:

\dfrac{d^2V}{dx^2} = 24(35/6) -88 = 52

We choose x = 3/2 to have the maximum volume because the value of x that gives a negative value is maximum.

So the dimensions (in inches) of the box is:

Height: 3/2 inches

Length: 15-2(3/2) = 12 inches

Width: 7 - 2(3/2) = 4 inches

5 0
3 years ago
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