Step-by-step explanation:

Answer:
a=1824
Step-by-step explanation:
Let your number be x
your equation will be (x+11)x = -80
expand the equation x^2 +11x +80 = 0
solve the equation and find x
Answer:
1.1x
x + 0.1x
Step-by-step explanation:
The manager of a store marks up all items by 10%.
So, if the original price of any item is x, then increase for markup is 10% of x i.e. .
Hence, the expression that represents the new price with the markup is (x + 0.1x) = 1.1x.
When a shape is rotated, it must be rotated over a line.
<em>The square must be reflected over line </em>
<em>, for it to be mapped onto itself.</em>
<em />
<u>The points are given as:</u>




To map the square onto itself, it must be reflected over its diagonal
The diagonals of the square are: AC and BD
<u>Using AC, we have:</u>
---- 
---- 
Start by calculating the slope (m)

So, we have:



The equation is then calculated as:

This gives:



Rewrite as:

So, the square must be reflected over line
, for it to be mapped onto itself.
See attachment for square ABCD and its line of reflection.
Read more about reflections at:
brainly.com/question/1878272