Please help, 20 points and if correct I will mark brainliest

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

Asporting good store is offering 30 percent off of the original price(x) of football cleats. the discount will be reduced by an another $7 before sales tax.

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.