Someone help me with this worksheet. Only 3 questions. Will give brainliest!!!

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?

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

If on=8x-8,lm=7x+4,nm=x-5,and ol=3y-6