What is the simplified form of this expression?

(-3x2 + 4x) + (2x2 − x − 11)

A.
-x2 + 5x − 11
B.
-x2 + 3x – 11
C.
-x2 + 3x + 11
D.
-x2 + 5x + 11

15 points ! ~ see if you know the answer to both you!

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?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?