2x*2 + 6x + 80
First we have to use distribution property
2(x*2 + 3x + 40)=0
Divide 2 to both sides
X*2 + 3x + 40=0
Multiply -1
-x*2 -3x-40=0
Add two numbers to get 3x
Multiply same two numbers that you add to get 40x*2
Add
-8x+5x= -3x
Multiply
-8x . 5x= -40x*2
-x*2-8x+5x-40
(X*2-8x) + (5x-40)
X(x-8)+ 5(X-8)
Common factor
(X-8)(x+5)
This would help you!
Answer:
A. 
Step-by-step explanation:
We are given the functions f(x) and g(x) as,


It is required to find the function ( f+g ) i.e. ( f+g ) (x)
So, 
i.e. 
Hence, we get that
.
So, the first option is correct.
Answer and explanation:

(x + 6)(x + 7)
List the multiples of 42
42: 1 2 3 6 7 14 21 42
Then see which of the multiples add up to 13
1 x 42 = 42 --> 1 + 42
13
2 x 21 = 42 --> 2 + 21
13
3 x 14 = 42 --> 3 + 14
13
6 x 7 = 42 --> 6 + 7 = 13
Answer:
Step-by-step explanation:
<u>The area of the flooring:</u>
- A = 1/2*8*(13.5 - 7.5) + 1/2(8 + 4 + 18)(7.5) = 136.5 ft²
<u>Cost of flooring:</u>
The mathematical expression for x is is fewer than 9 is x< 9