20 + 8x = 32
- 20
8x = 12
--      --
8       8
x = 3/2= 1 1/2
        
             
        
        
        
Answer:
432 pages.
Step-by-step explanation:
We know Madison reads 24pgs/ per day. She reads for nine days, so  she reads 24*9 pages, or 216.
We know also that this is halfway through her book, so 2*216= the whole book, so the book has 432 pages
 
        
                    
             
        
        
        
Answer:
780 sheets
Step-by-step explanation:
we know that
A machine can shred 65 sheets of paper every 5 seconds
so
using proportion
Find out how many sheets of paper can the machine shred in 60 seconds
 
        
                    
             
        
        
        
Answer:
The mathematical expectation of a student who purchases 10 tickets is -$39.65.
Step-by-step explanation:
A student that purchases 10 tickets out of 2900 has a probability of winning the cruise that can be calculated as:

Each ticket cost $5, so he has spent $50 for the 10 tickets.
Then, the expected value of this operation is equal to the expected value of the earnings (probability of winning the prize multiplied by the value of the prize), minus the costs:

The mathematical expectation of a student who purchases 10 tickets is -$39.65.
 
        
             
        
        
        
Answer:
The answer is C: 75
Step-by-step explanation:
The constant is found by multiplying your height and width, so thats really all you do.
25x3=75
15x3=75
3x15=75
25x3=75
75 would be the constant.