Between 2000 and 2010, coal and petroleum production from the fuel- producing countries can be modeled by the following system of equations,
where x = 0 represents the year 2005:
Coal production: y = 93.2x + 3100
Petroleum production: y=-29.1x + 2942
Calculate the
year in which production from both forms of fuel was equal.

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).

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

Can someone me with the property questions for 12 13 and 14 plz