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zimovet [89]
2 years ago
5

The surface area of a cube is 27^2. Calculate the length of the sides of the cube

Mathematics
1 answer:
Anon25 [30]2 years ago
5 0

Answer:

Step-by-step explanation:

Do you mean 27 units² ?

A cube has six congruent, square faces. Area of one face = (27/6) units²

Length of one edge = √(27/6)

= √(9/2)

= √9/√2

= 3/√2

= 3√2/2 units

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Answer:

Step-by-step explanation:

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2 years ago
7x + 4y = 2<br> 7x + 2y = 8
Mariana [72]

Answer:

x  =  2 , y  =  − 3

Step-by-step explanation

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Point Form: ( 2 , − 3 )

Equation Form: x  =  2 , y  =  − 3

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2 years ago
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SVEN [57.7K]
I'm not too sure either.

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7 0
3 years ago
Read 2 more answers
The bottom of a doorway to a building is 3.45 feet above the ground, and a ramp to the door for the disabled is at an angle of 6
Darya [45]

Answer:

The ramp should be 32.9 feet longer.

Step-by-step explanation:

When the ramp is at 6^{o} to the ground, its length can be determined by applying the appropriate trigonometric function. Let the length be represented by l, so that;

Sin θ = \frac{opposite}{hypotenuse}

Sin 6^{o} = \frac{3.45}{l}

l = \frac{3.45}{Sin 6^{o} }

 = \frac{3.45}{0.10453}

 = 33.0048

l = 33.0 feet

When the angle is reduced to 3^{o}, the length of the ramp would be;

Sin θ = \frac{opposite}{hypotenuse}

Sin 3^{o} = \frac{3.45}{l}

l = \frac{3.45}{Sin 3^{o} }

 = \frac{3.45}{0.05234}

= 65.9152

l = 65.9 feet

Change in length of ramp = 65.9 - 33.0

                            = 32.9

The ramp should be 32.9 feet longer.

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3 years ago
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Nataliya [291]

Answer:

29

Step-by-step explanation:

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2 years ago
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