The order of a matrix is m×n where m is the number of rows and n is the number of columns.
can you count and find what are m and n here?
 
        
             
        
        
        
For the first one:
m is the slope, or how much the line goes up compared to goes right.  In this case, the line goes up 40 every time it goes right 10.  We write this as a fraction so 40/10, which simplifies to 4.  Therefore the equation would be y = 4x.
 
        
             
        
        
        
Answer:
I think the answer is D!
Step-by-step explanation:
 
        
             
        
        
        
Answer:
It has an infinite amount as the decimal keeps going to over 1 million digits and beyond.
Step-by-step explanation:
 
        
             
        
        
        
Answer is 10 and 170, complementary angles are 90°, while supplementary angles are 180 in total, if angle A is 80 then you subtract 90 by 80 and you get 10, so that is angle B, So then you are asked what is angle C. Which is part of the supplementary angle so you take the 10° that you got from B and then you subtract 180 by the 10, And thats how you get 170 and that's how you know that C is 170 (hope this explanation helps)