17. The Wechsler Adult Intelligence Scale (WAIS) is common "1Q test" for adults. The distribution of WAIS scores for persons over 16 years of age is approximately normal with mean of 100 and standard deviation 1.5. Let 8=the mean of WAIS score in a random sample of 10 people over 16 years of age. a. Calculate the mean and standard deviation of the sampling distribution of R.

b. Interpret the standard deviation from part (a)

C. What is the probability that the average WAIS score is 105 or greater for a random sample of 10 people over 16 years of age? Show your work.

Look at this system of equations. -3x + 3y = 12 y = x + 4 the solution set of this system is best explained by which of these statements? a) the graphs of the equations are the same line because the equations have the same slope and the same y-intercept. the system has infinitely many solutions. b) the graphs of the equations are parallel lines because they have the same slope but different y-intercepts. the system has no solution. c) the graphs of the equations are lines that intersect at one point because the equations have the same slope but different y-intercepts. the system has exactly one solution. d) the graphs of the equations are lines that intersect at one point because the equations have the same slope and the same y-intercept. the system has exactly one solution.

Build is 120 wide 20 feet high 48 feet long how many cubic feet and the volume

Ireally don't understand this, i'm really an idiot but i want to know how to figure this out. !