Can someone help me find the solution?

What are the soultion(s) to the quadratic equation 40- x^2=0

Jessie and bob are financing $425,500 to purchase a house. they obtained a 30/8 balloon mortgage at 6.55%. what will their balloon payment be?

Travis has decided to budget his spending money. he can spend no more than $143.15 every month. he has also decided to spend 5.2 times as much money on video games as he spends on the movies.what linear inequality describes this problem