Ihave 5 identical envelopes. you get to pick one.

1 envelope has $10 in it.
2 envelopes have $1 in them and 2 envelopes have a quarter (25 cents) in them.

what is the expected value?

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Solve the system of equations. y= 2x y= x^2 - 15

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?