Sandra makes and sells bracelets. it costs her $2 to make each bracelet, plus a one-time cost of $15 for supplies. she plans to sell each bracelet for $5. let x represent the number of bracelets. which equation can be used to find the number of bracelets she needs to sell to break even?

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).

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

(60 points) explain this in detail