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Oksana_A [137]
3 years ago
14

Find the side of a cube whose surface area is 216 sq. m​

Mathematics
2 answers:
nikitadnepr [17]3 years ago
6 0

SA = 6a²

216 = 6a²

36 = a²

a = 6

Anon25 [30]3 years ago
5 0

Answer:

6 m

Step-by-step explanation:

Side = x

Surface area = 6x^2

6x^2 = 216

x^2 =36

x = 6

The answer is 6m

Hope this helps :)

Have a nice day!

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The Sun is roughly 10^2 times as wide as the Earth. The Star KW Sagittarii is roughly 10^5 times as wide as the Earth. About how
Studentka2010 [4]

Answer:

1000 times

Step-by-step explanation:

Given:

The Sun is roughly 10^2 times as wide as the Earth.

The Star KW Sagittarii is roughly 10^5 times as wide as the Earth.

Question asked:

About how many times as wide as the Sun is KW Sagittarii?

Solution:

Let the width of the earth =  x

As the Sun is roughly 10^2 times as wide as the Earth, hence the width of the sun = x\times10^{2}

And as the Star KW Sagittarii is roughly 10^5 times as wide as the Earth, hence the width of the Star = x\times10^{5}

Now, to find that how many times width of the Star  KW Sagittarii is as respect to the width of the Sun, we will simply divide:

Width of the Star  KW Sagittarii =  x\times10^{5}

Width of the Sun = x\times10^{2}

\frac{x\times10^{5} }{x\times10^{2} }

x canceled by x

\frac{10^{5} }{10^{2} } =10^{5-2} =10^{3} =10\times\ 10\times10=1000

Therefore, Star  KW Sagittarii is 1000 times wider than Sun.

<em>First of all we calculated width of Sun in terms of width of earth and then calculated the width of the Star in terms of earth and for comparison we did simple division that showed that the Star KW Sagittarii is 1000 times wider than the Sun.</em>

<em />

4 0
3 years ago
What is the value of x?<br> please help!!
Lesechka [4]

Answer:

28°

Step-by-step explanation:

soln

(x+3)°+(2x+3)°

x°+3°+2x°+3°=90°(beign complementary angles)

3x+6=90°

3x=90°_6

3x=84

x=84/3

x=28°

4 0
4 years ago
Read 2 more answers
The difference of 3 times a number and 15 is no less than the square of the number.
jok3333 [9.3K]

Answer:

(B) The inequality that represents this relationship is 3x  < x^2 +15

Step-by-step explanation:

Let us assume the given number = x

⇒ 3 times the given number = 3 (x)  = 3x

Square of the given number = (x)^2  = x^2

Now, According to the question:

The difference of (3 x) and 15 is no less than x^2

⇒ 3x - 15 < x^2\\ \implies 3x  < x^2 +15

or, 3x  < x^2 +15

Hence, the given inequality is represented as 3x  < x^2 +15

8 0
3 years ago
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Evaluate the function f(x)=x^2+6x+2 at the given values of the independent variable and simplify.
____ [38]

Answer:

a) 18

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c)x^2 -6x+2

Step-by-step explanation:

This is a case of plugging in the value into f(x).

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f(-8)= 64 + (-48) +2

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So here I'll take a break to explain what's going on, because x+2 is a binomial meaning two terms and it is being squared I have to multiply the whole thing by itself. Meaning: (x+2) x (x+2), this is also known as foiling!! and for the next part its distributing 6 into x and 2.

    f(x+2)= x^2+4x+4+6x+12+2

I'll reorder it

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    f(x+2)= x^2+10x+18

c) f(-x)= -x^2+6(-x) +2

f(-x)= x^2 -6x+2

6 0
3 years ago
What is the ratio of chicks to dogs? Answer in fraction form.
Georgia [21]

Answer:

The ratio of cats to dogs is 2:1 The ratio of dogs to cats is 1:2 or half as many dogs as cats. There are six cats and three dogs.

Step-by-step explanation:

one and two

4 0
2 years ago
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