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KatRina [158]
3 years ago
8

Which expression is a perfect cube?

Mathematics
2 answers:
shutvik [7]3 years ago
6 0

Answer:

216x^9 y^18 is a perfect cube

Step-by-step explanation:

To find out the expression that is a perfect cube, we need to take cube root for each expression

\sqrt[3]{8x^21 y^8} = \sqrt[3]{2^3x^{21} y^8}=2^{\frac{3}{3}} x^{\frac{21}{3}} y^{\frac{8}{3}}

8 is not divisible by 3 so it is not a perfect cube

\sqrt[3]{64x^64 y^64} = \sqrt[3]{2^6x^{64} y^{64}}=2^{\frac{6}{3}} x^{\frac{64}{3}} y^{\frac{64}{3}}

64 is not divisble by 3

\sqrt[3]{125x^9 y^20} = \sqrt[3]{5^3x^9 y^{20}}=5^{\frac{3}{3}} x^{\frac{9}{3}} y^{\frac{20}{3}}

20 is not divisible by 3

\sqrt[3]{216x^9 y^{18}} = \sqrt[3]{6^3x^9 y^{18}}=6^{\frac{3}{3}} x^{\frac{9}{3}} y^{\frac{18}{3}}=6x^3y^6

maks197457 [2]3 years ago
3 0

-216x^9 y^18 is a perfect cube

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Could someone help me with this?
umka2103 [35]
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Find area of one triangle
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Area of triangle = 1/2 x base x height
Area of triangle = 1/2 x 9 x 11.75
Area of triangle = 52.875 ft²

---------------------------------------------
Find area of two triangles
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Area of 2 triangles = 52.875 x 2 
Area of 2 triangles = 105.75 ft²

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Find the cost of the flower beds
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1 ft² = $4.25
105.75 ft² = 105.75 x 4.25
105.75 ft² = $449.44 (nearest hundredth)

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Answer: $449.44
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8 0
3 years ago
Given the figure below, find the values of x and z.<br> X=<br> Z=<br> (11x - 93)<br> H<br> 116<br> X
Marrrta [24]

Answer:

x = 19

z = 64

Step-by-step explanation:

Angles (11x - 93)° and 116° are vertical angles, so their measures are equal.

11x - 93 = 116

11x = 209

x = 19

Angles z° and 116° are a linear pair, so they are supplementary, and their measures have a sum of 180°

z + 116 = 180

z = 64

6 0
1 year ago
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In Pattern 1, they all contain the blue points. In Pattern 2, they all seem to share a center point. I'm not sure about Challenge 1 though.
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if jack is sitting on the chair no 14 from the left Find his place from the right if the chairs are numbered from 1 to 40 ?
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Answer:

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Step-by-step explanation:

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