Please help, I’m struggling

How can constraints be used to model a real-world situation?

Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee

Margaret is purchasing a house for $210,000 with a 15 year fixed rate mortgage at 4.75% interest she has made a 5% down payment the house is valued at 205,000 and the local tax rate is 3.5% homeowners insurance 600 per year what are her total monthly payment