Answer: 384 in²
Step-by-step explanation: Surface area is the sum of the areas of all of the faces of a three-dimensional figure.
So to find the surface area of a cube, it's important to understand that each face of a cube has the same area. So we can simply find the area of one face of a cube and multiply it by the number of faces which is 6.
To find the area of one face of a cube, we can use the formula for the area of a square.
Area = S²
Since the length of a side is 8 inches, we have (8 in.)² or 8 inches x 8 inches which gives us 64 in.².
Now, since there are 6 sides to a cube, we have (64 in.)² (6) which is equal to 384 inches².
Therefore, the surface area of the cube is 384 in².
4/5x>14
2)0
3)8
4)-6
Help me out guys.
Answer:
8
Step-by-step explanation:
The condition for the discriminant b² - 4ac is
If b² - 4ac > 0 then roots are real, irrational and unequal
If b² - 4ac > 0 and a perfect square, roots are real, rational and unequal.
Thus
b² - 4ac = 8
Answer:
3) 8
Step-by-step explanation:
Real and unequal:
B² - 4AC > 0
Irrational: B²-4AC not a perfect square
Answer: 3t^2-9t+2
Step-by-step explanation: im assuming you meant +2. First you need to distribute 3t^2-15t+6t+2 and then you need to combine like terms.
solve for y
please I need help
Answer:
The answer is y = -2.
Step-by-step explanation:
To start, you need to cross multiply to solve.
3/y = 6/(y -2)
y*6 = 3*(y -2)
6y = 3y - 6
3y = -6
y = -2