Add 7abc, -5abc,9abc,-8abc

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).

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

What is the distance between the points (2, 5) and (5,9)?