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3 years ago

The length of one edge of a cube is 4cm. What is the surface area of the cube?

Mathematics

2 answers:

larisa [96]3 years ago

5 0

Answer:

16 cm

Step-by-step explanation:

4x4 = 16

olya-2409 [2.1K]3 years ago

3 0

Answer:

96 cm²

Step-by-step explanation:

the formula for surface area of a cube is

SA= 6x² with x being the measure of an edge

this is because a cube has 6 faces and since a cube is made up of squares, all of its faces are the same measure.

so,

SA= 6(4)²

SA= 6(16)

SA= 96

hope this helps

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25%

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Aneli [31]

Answer:

<h3>The given set of polynomials f(x) and g(x) are closed under subtraction.</h3>

Step-by-step explanation:

Given that the functions f ad g are defined by

$f(x)=7x^3-3x^2-x+14$ and $g(x)=2x^3+2x+5$ respectively.

<h3>To show that the set of polynomials is closed under subtraction :</h3>

Now subtract the given polynomials

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∴ $f(x)-g(x)=5x^3-3x^2-3x+9$

When subtracting the polynomials the variables and their exponents remains same only variation in their coefficients.

<h3>Hence the given polynomials f(x) and g(x) are closed under subtraction.</h3>

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