Step-by-step explanation:
It came from nowhere.  It makes no sense to add up the balance numbers.  To illustrate, let's use a different example:
![\left[\begin{array}{cc}Spend&Balance\\100&400\\100&300\\100&200\\100&100\\100&0\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7DSpend%26Balance%5C%5C100%26400%5C%5C100%26300%5C%5C100%26200%5C%5C100%26100%5C%5C100%260%5Cend%7Barray%7D%5Cright%5D)
Adding up the money you spent, and you get $500.  Add up the balances, and you get $1000.  But why would you add the balances?  The 300 in the second line is included in the 400 in the first line.  You can't add them together.  You'd be counting the 300 twice.
 
        
             
        
        
        
Answer:
b
Step-by-step explanation:
the answer is b because you add all those together then boom
 
        
             
        
        
        
Step-by-step explanation:
6n-10=50
6n=60
n=10
rlu=6n-10
=6×10-10
=60-10
50
 
        
             
        
        
        
Answer:
A
Step-by-step explanation:
y is -6 = y-6
x=2 so =x+2
slope is -3/4
 
        
             
        
        
        
The answer is D.
This figure has 4 sides which makes it a quadrilateral.
This figure has 2 sets of parallel sides which makes it a parallelogram.
This figure has 4 equal sides which makes it a rhombus.
This figure has 4 right angles which makes it a rectangle.
And this figure has both 4 equal sides and 4 equal angles which makes it a square.
To make it easier, all squares are: quadrilaterals, parallelograms, rhombuses, rectangles and of course squares.