Answer:
the answer is 14x+8y+4
Step-by-step explanation:
There are 9000 4 digit numbers that exist. Hope that helps!
For this case we must find the solutions of the following quadratic equation:
The roots will come from:
Where:
Substituting:
The roots are:
Answer:
Option C
2/3 because 2 is close to 3 and 4 isnt very close to 6