Has anyone heard from mariahb i need her help
its serious

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).

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

Solve the system of equations. y= 2x y= x^2 - 15