Basically expand
use FOIL (a way to remember distributive property)
first outer inner last
that is th eorder to multiply them
First: x times 2x=2x²
Outer: x tmes 9=9x
Inner: -8 times 2=-16x
last: -8 times 9=-72
add them
2x²+9x-16x-72
2x²-7x-72
Answer:
No
Step-by-step explanation:
Integers are whole numbers (not decimals or fractions) that are either <u>positive,</u> <u>negative</u>, or <u>zero</u>.
There are no whole numbers (integers) between 0 and 1.
So 4 is 2 times 2 and 4 times 2 is 8
so your room has the dimensions 4 ft x 2 ft
Answer:
![x = 8](https://tex.z-dn.net/?f=x%20%3D%208)
Step-by-step explanation:
Given
The attached triangle
Required
Determine the value of x
x represents the height of the triangle.
And the area of a triangle is calculated as:
![Area = \frac{1}{2} * Base * Height](https://tex.z-dn.net/?f=Area%20%3D%20%5Cfrac%7B1%7D%7B2%7D%20%2A%20Base%20%2A%20Height)
Where
![Base = 4](https://tex.z-dn.net/?f=Base%20%3D%204)
![Area = 16](https://tex.z-dn.net/?f=Area%20%3D%2016)
![Height = x](https://tex.z-dn.net/?f=Height%20%3D%20x)
The expression becomes
![16 = \frac{1}{2} * 4* x](https://tex.z-dn.net/?f=16%20%3D%20%5Cfrac%7B1%7D%7B2%7D%20%2A%204%2A%20x)
![16 = 2* x](https://tex.z-dn.net/?f=16%20%3D%202%2A%20x)
![16 = 2x](https://tex.z-dn.net/?f=16%20%3D%202x)
Divide through by 2
![8 = x](https://tex.z-dn.net/?f=8%20%3D%20x)
![x = 8](https://tex.z-dn.net/?f=x%20%3D%208)