Which is a simplified form of the expression -2(x – 9) – x?

a. -3x + 18
b. 3x – 18
c. x – 9
d. x + 18

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?

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?

What is the solution to the equation below? 3/x-2+6=square root x-2 +8