Set up a system of equations needed to solve the problem. DO NOT SOLVE. Just write the two equations.
You must label your variables.
You have 42 coins valued at $3.00. Some of the coins are dimes and some are quarters. Find the number of each you
have.

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 solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)