All categories

2 years ago

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

You might be interested in

PLZ hurry, 20 points for simple Q: Solve 5x + 1 = 2x2 + 9x.

iragen [17]

The answer is:

a: 1 = 2(x^2 + 2x)
b:1 = 2x^2 + 4x
d:3 = 2(x + 1)^2

you can tell these are your answer when you solve it.
Hope this helps!

8 0

3 years ago

Read 2 more answers

Marcos had 15 coins in nickels and quarters. He had 3 more quarters than nickels. He wrote a system of equations to represent th

hodyreva [135]

Answer:

There are 6 coins in nickels and 9 coins in quarters.

Step-by-step explanation:

Now, to find the solution.

According to question:

The number of nickels = $x$ .

The number of quarters = $y.$

So, the total number of coins:

$x+y=15.$

He had 3 more quarters than nickels.

Thus,

$y=x+3$ .....(1)

Now, to get the solution:

$x+y=15$

Substituting the equation (1):

$x+(x+3)=15$

$x+x+3=15$

$2x+3=15$

Subtracting both sides by 3 we get:

$2x=12$

Dividing both sides by 2 we get:

$x=6.$

The number of nickels = 6.

Now, substituting the value of $x$ in equation (1):

$y=x+3\\\\y=6+3\\\\y=9.$

The number of quarters = 9.

Thus, there are 6 coins in nickels and 9 coins in quarters.

6 0

3 years ago

What is the slope of this line?

katen-ka-za [31]

The slope of this line is -3/4

In order to find this, we look for two points on the line and then use the slope formula. Two points that are on the line are (0, 2) and (4, -1). Plug these into the following formula.

m (slope) = (y2 - y1)/(x2 - x1)

m = (-1 - 2)/(4 - 0)

m = -3/4

8 0

3 years ago

Read 2 more answers

Scale factor for a model is 15cm. Actual =55.5m. model. =25.25. What is the meter

Rasek [7]

We calculate for the actual length of the thing in the model that measures 25.25 by multiplying this value by the scale factor. That is,
(25.25 cm) x (55.5 m / 15 cm) = 93.425 m
Therefore, the real dimension of the object is approximately 93.43 m.

3 0

3 years ago

PLS HELP ITS URGENT!!

DiKsa [7]

Answer:

SA= 28 in^2

V= 14 in^3

Step-by-step explanation:

circumference= 2πr

9.4 = 2πr

r = 1.496

surface area of a ball = $4\pi r^{2}$