Amy and Darren each solved the following system of equations using a different method y=0.5x + 1
4x -2y=4

Is either of them correct? Explain your reasoning and give the correct solution to the system.

Rose and andrew are financing $128,000 to purchase a condominium. they obtained a 15-year, fixed-rate loan with a rate of 5.05%. they have been given the option of purchasing up to four points to lower their rate to 4.81%. how much will the four points cost them?