Answer: 90 textbooks
Step-by-step explanation:
everytime you multiply the number of students you multiply the books by the same number. to find how many times 72 was multiplied you divide it by 12.
72 ÷ 12 = 6
then multiply the original number of books (15) by 6.
15 * 6 = 90
so for every 72 students the school orders 90 textbooks
 
        
             
        
        
        
Answer:
total money=rupees 50
3/5 of 50= rupees 30
money he spent = rupees 30
money he's left with =50-30=20
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Answer:
ill help
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The lower the volume, the higher the pressure.
Step-by-step explanation:
Volume and pressure are inverse to each other -- so the more pressure, the less volume, and vice versa. Think of it like this: if you were squished into a tiny room, there would be a lot of pressure on you, and not a lot of volume to move in!
You can also think of it numerically. The higher the V in that equation (the higher the denominator) the lower the p in the equation.
 
        
                    
             
        
        
        
4|x - 1| - 7 = -3    |add 7 to both sides
4|x - 1| = 4    |divide both sides by 4
|x - 1| = 1 ⇔ x - 1 = 1 or x - 1 = -1    |add 1 to both sides
x = 2 or x = 0
Answer: B.