Find the value of x problem solving with angles

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

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Your client has saved $1,860 for a down payment on a house. a government loan program requires a down payment equal to 3% of the loan amount. what is the largest loan amount that your client could receive with this program