What expression is equivalent to 2 (a+2b)-a-2b
3a+2b
3a-2b
a-2b
a+2b

S-7< 3 i need answering this problem someone asap answer

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?