Answer:
-10x + 1.5
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
441/100
Step-by-step explanation:
To turn a decimal into a fraction we need to multiply it by 100
4.41*100=441
Now we need to divide it by 100
441/100
441 and 100 dont share any common multiplies besides 1, so we cant simplify the fraction.
 
        
             
        
        
        
Answer:
The expressions for the payment made to Mary are,
 (Monday) 90 = 15m + b
 (Tuesday) 62 = 8m + b
where m and b are the fee per student and the base fee, respectively. Solving for m and b, the values are 4 and 30. 
The equation that represents Mary's earning is 
 y = 4x + 30
 For 20 students,
 y = 4(20) + 30 = 110
For Lisa's earnings,
 y = 8x + 15
Substituting 20,
 y =8(20) + 15 = 175
Thus, Lisa would earn more than Mary by $65.
(Btw this is not my work, I got it from someone else on brainly and wanted to help lol)
 
        
             
        
        
        
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Step-by-step explanation:
-x, -(x+1)
-x-(x+1)=10506
x^2+x-10506=0