See https://web2.0calc.com/questions/i-m-really-stumped-polynomials
Unfortunately, Guest plotted the second inequality as y - 2x <= 5 instead of y - 2x <= 6.
However, if you change that on the Desmos graph you will be able to obtain the correct answer.
The prime factors of 20190 are 2*3*5*673
Now 3*673 = 2019, so this is a, say.
b and c must be multiples of this, so b 2*2019 = 4038 and c = 5*2019 = 10095
The three numbers are: 2019, 4038 and 10095
I'll leave you to add them up.
See https://web2.0calc.com/questions/an-answer-was-originally-written-as-a-photo-is-there#r4
The sum of the coefficients of any polynomial, f(x), is obtained by setting x = 1. Hence the sum is given by f(1), which is 32 here (the rest of the information in the question is just there to confuse you!).
Here's a starter:
See if you can take it from here.
Here is the question and answer again:
As follows:
The average of two 2-digit positive integers is equal to the decimal number obtained by writing one of the two-digit integers before the decimal point and the other two-digit integer after the decimal point. What is the smaller of the two integers?
This question yet again!
+33667 
