-5y-3+6y=15 How do I solve it?

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

In a sample of 200 residents of georgetown county, 120 reported they believed the county real estate taxes were too high. develop a 95 percent confidence interval for the proportion of residents who believe the tax rate is too high. (round your answers to 3 decimal places.) confidence interval for the proportion of residents is up to . would it be reasonable to conclude that the majority of the taxpayers feel that the taxes are too high?

Can someone me with my math problem pls my teacher is on my back about this