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3 years ago

What’s the area of a cube where the length of each edge is 4 inches

Mathematics

2 answers:

stepan [7]3 years ago

8 0

Answer: 18

Step-by-step explanation:

NARA [144]3 years ago

6 0

Answer:

96 in²

Step-by-step explanation:

A cube has 6 equal, square sides. If s is the length of one edge of the cube, then the area of one side is A = s² and the total surface area is 6s².

If s = 4 in, then the total surface area of the cube is 6(4 in)² = 96 in².

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Honestly just confused help please

AlekseyPX

Answer:

I think true is the right answer

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3 years ago

Select whether the equation has a solution or not.

vredina [299]

Answer: The equation has a solution .

Step-by-step explanation:

Since we have given that

$\sqrt{x+1}=7-2\sqrt{x}$

Squaring on both the sides, we get that,

$x+1=(7-2\sqrt{x})^2\\\\x+1=49+4x-28\sqrt{x}\\\\3x+48-28\sqrt{x}=0$

Let $\sqrt{x}=y\implies x=y^2$

So, our equation becomes,

$3y^2-28y+48=0\\\\y=\dfrac{14}{3}\pm \dfrac{2\sqrt{13}}{3}\\\\\sqrt{x}=\dfrac{14}{3}\pm \dfrac{2\sqrt{13}}{3}\\\\x=(\dfrac{14}{3}\pm \dfrac{2\sqrt{13}}{3})^2$

So, $x=\dfrac{248}{9}\pm \dfrac{56\sqrt{13}}{9}$

Hence, the equation has a solution .

4 0

3 years ago

IF XPOWER 3 =27,THEN X POWER 2=

kvv77 [185]

X²= 9

X POWER 3= 27

X³= 27

The number that can be multiplied three times to get 27 is 3

Therefore X POWER 2 (X²) can be calculated as follows

= 3²

= 3 × 3

= 9

Hence XPOWER 2 is 9

#SPJ1

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1 year ago

Write an expression that contains at least two terms and is in simplest form<br>

sertanlavr [38]

Answer:

5(x2 + 3x) = 5(22 + 3

Step-by-step explanation:

Hope it is helpful....

8 0

3 years ago

How do you factor 9x^3 + 64 <br> (Please show steps)

Novosadov [1.4K]

First, let's review the formula for the "sum of two cubes:"

a^3 + b^3 = (a + b)(a^2 - ab + b^2).

Unfortunately, 9 is not a perfect cube. The cube root of 9 is 9^(1/3), and the square of the cube root of 9 is therefore 9^(2/3).

Thus,

9x^3 + 64 = (9^(1/3)*x + 4) * (9^(2/3)x^2 - 4*9^(1/3) + 16)

8 0

3 years ago