Twice a number increased by 12 is equal to 31 less than three times the number. find the number

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

What is the y intercept of f(x)=(1/2)^x?

Benito is selecting samples of five values from the table, which row will result in the greatest mean? population data row 1 4 2 2 3 3 row 2 3 3 4 3 2 row 3 2 4 3 4 3 row 4 3 4 4 7 3 row 1 row 2 r