21. A server earns a 15% tip on average from the food he serves. If he serves $470 worth of food, how much money will he earn in tips? A. $7.05 C. $31.33 B. $70.50 D. $10.57

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A: Please follow step 2nd  . 

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A: To determine the determinant of the following matrix.A=1340-3-6-72330-4-5-329

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A: The detailed solution is given below Thank you 

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A: f(1)=3 ,  f(n)=f(n-1)+1For n=2f(2)=f(1)+1       =3+1       =4⇒f(2)=4For n=3f(3)=f(2)+1       =4+1   ...

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A: Let's find. 

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A: Topic = Quadratic equations Correct answer = 29 ; Two

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A: qx=2x-2rx=-2x2-1

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A: We will find all the asked values as following.

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A: Given function f(x)=3x   ;  x0=2

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Q: percent

A: Please refer to the image below