Answer:
Step-by-step explanation:
Remember that the sides of a cube always have the same length.
In this case the length of the sides L is:
.
The cubes have 6 faces. Then the surface area of the cube is equal to the area of its 6 faces.
Since all sides of the cube have the same measure, then the area of each face is:
Then the area of the 6 faces is:
Answer:
8x² + 6x - 35
Step-by-step explanation:
A = (2x + 5)(4x - 7)
Front: 2x * 4x = <em>8x²</em>
Outside: 2x * (-7) = <em>-14x</em>
Inside: 5 * 4x = <em>20x</em>
Last: 5 * -7 = <em>-35</em>
Add up: <em>8x² - 14x + 20x -35</em>
Simplify: 8x² + 6x - 35
X=-6 is the axis of symmetry
Answer:
2,0
Step-by-step explanation:
Sorry if I got it wrong.
First solve the equation:
5(3x-7)=20 => 15x - 35 = 20 => 15x = 55 => x=11/3
Fill in this solution in 6x-8:
6*11/3 - 8 = 22 - 8 = 14
Second question: apply the distributive property (ie,. both terms get multiplied by 4/5):
4/5(20x - 10) = 80/5x - 40/5 = 16x - 8
