Answer:
Good to know? Is this even a question lol
Step-by-step explanation:
(3 − 4i) (1 + 5i) − (2 − i)
3 + 15i − 4i − 20i² − 2 + i
1 + 12i + 20
21 + 12i
(a² + 3a − 7) (2a² − a + 4)
a² (2a² − a + 4) + 3a (2a² − a + 4) − 7 (2a² − a + 4)
2a⁴ − a³ + 4a² + 6a³ − 3a² + 12a − 14a² + 7a − 28
2a⁴ + 5a³ − 13a² + 19a − 28
We know that the side lengths of the square base are: x * x. The volume is 12, so for now, let's say that y is the other side length. Then, x * x * y = 12. We can solve for y: y = 12/x^2. Now, we find the surface area of the 5 sides.
Four of the sides have the same area: x * (12/x^2) = 12/x, so we multiply this by 4: 48/x.
The last side is the base: x * x = x^2.
We add 48/x to x^2:
x^2 + 48/x
So, the answer is the fourth choice, (d).
Answer:
The measured side is not shown, so i will answer in a general way.
A cube is a 3-dimensional object with 6 square faces.
You know that all the sides of a square have the same length, then is the same for the cube.
To calculate the volume of a cube, we start with the area of the base.
The base is a square of sidelength L (Suppose that L is the length of the measured side)
The area of the base is:
A = L^2.
To find the volume, we must multiply the area of the base by the height of the fire (because the section of the base does not change).
And the height of the cube is also L.
Then the volume is:
V = L*a = L^3
