An even number minus an even number

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2

Write the sentence as an equation. 6 fewer than the quantity 140 times j equals 104