Which phrase matches the algebraic expression below 3(x+7)+10

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).

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5