Combining Like Terms
What is 2x-3x

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 average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost