Which equation is in standard form 3x +4y=10 ,19 +3y =2x , 7y-7x =8 . 8 +5x =3y

Step-by-step explanation:

we know that

The standard form of a line is in the form

where

A is a positive integer, and B, and C are integers

Verify each case

case A) -------> is in standard form

case B) -------> is not in standard form

case C) -------> is not in standard form (the coefficient of x must be positive)

case D) -------> is not in standard form

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)