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Phoenix [80]
2 years ago
14

Find the values of x y and z

Mathematics
1 answer:
andrey2020 [161]2 years ago
4 0

9514 1404 393

Answer:

  • x = 18√2
  • y = 18√3
  • z = 36

Step-by-step explanation:

These "special" right triangles have side length ratios that it is useful to remember.

<u>45°-45°-90° triangle</u>

Sides have the ratios 1 : 1 : √2. That is, x is √2 times as long as the side length shown as 18.

  x = 18√2

<u>30°-60°-90° triangle</u>

Shortest to longest, sides have the ratios ...

  1 : √3 : 2

That is, y is √3 times the length of the side marked 18, and z is 2 times the length of the side marked 18.

  y = 18√3

  z = 2·18 = 36

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The volume of a rectangular prism (shown below) is 48x^3+56x^2+16x Answer the following questions:
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Answer:

(a)

Length = 8x\\Width = 3x + 2\\Height = 2x + 1

(b)

P(2) = 640

(c)

Length= 16

Width = 8

Height =5

(d)

Volume = 640

Step-by-step explanation:

Given

P(x) = 48x^3 + 56x^2 + 16x

Solving (a): The prism dimension

We have:

P(x) = 48x^3 + 56x^2 + 16x

Factor out 8x

P(x) = 8x(6x^2 + 7x + 2)

Expand 7x

P(x) = 8x(6x^2 + 4x + 3x + 2)

Factorize

P(x) = 8x(2x(3x + 2) +1( 3x + 2))

Factor out 3x + 2

P(x) = 8x(3x + 2)(2x + 1)

So, the dimensions are:

Length = 8x\\Width = 3x + 2\\Height = 2x + 1

Solving (b): The volume when x = 2

We have:

P(x) = 48x^3 + 56x^2 + 16x

P(2) = 48 * 2^3 + 56 * 2^2 + 16 * 2

P(2) = 640

Solving (c): The dimensions when x = 2

We have:

Length = 8x\\Width = 3x + 2\\Height = 2x + 1

Substitute 2 for x

Length=8*2

Length= 16

Width = 3*2+2

Width = 8

Height = 2*2 + 1

Height =5

So, we have:

Length= 16

Width = 8

Height =5

Solving (d), the volume in (c)

We have:

Volume = Length * Width * Height

Volume = 16 * 8 * 5

Volume = 640

8 0
2 years ago
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