Determine if the equation is linear.
(1.) 2x + y=4

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.

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