From the sum of 4a + b + c and 9a - c subtract the sum of 18a - b - c and 14a - 2b - c PLS): HELP ME ​

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81

Use set buikder notation to represent the following set: {, -2, -1, 0}

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items