Answer:
x² + 23x + 49
Step-by-step explanation:
Since the area of a rectangle is: A = l x w, where l = length and w = width, we can find the overall area of the shaded region by multiplying the entire area and subtracting the smaller area of the unshaded square:
(2x + 5)(x + 10) - (x + 1)² or (2x + 5)(x + 10) - (x² + 2x + 1)
Distribute/FOIL:
2x² + 20x + 5x + 50 - x² - 2x -1
Combine like terms:
x² + 23x + 49
The answer is 1.19%
Or 119.0
4 + 5 = 9
180 ÷ 9 = 20
Sand = 20×4 = 80
Cement = 20×5 = 100
(1) Answer : 
Step 1: 
Step 2: 
In completing the square method we take coefficient of x and divide by 2 and the square it . Then add it on both sides
The coefficient of x is -6.
= (-3)^2 = 9
The coefficient of y is -4.
= (-2)^2 = 4
Step : 
(2) 
To find center and radius we write the equation in the form of
using completing the square form
Where (h,k) is the center and 'r' is the radius


In completing the square method we take coefficient of x and divide by 2 and the square it . Then add it on both sides


Here h= -3 and k=3 and
so r= 4
Center is (-3,3) and radius = 4
(c) Step 1: 
Step 2: 
Step 3: 
Step 4: 
We factor out each quadratic
(x^2 + 8x + 16) = (x+4)(x+4) = 
((y^2 - 6y + 9)) = (x-3)(x-3) = 
Step 5 :
I think its only B because it's the only one I see that is enlivenment.<span />