Help please guys
How to solve it ?

What is the quadric regression equation that fits these data

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

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