At a party there are 30 students over the age of 18 and 20 students under 18. You

randomly choose 3 students over 18 and 2

students under 18 to interview. This is an

example of:

A. A convenience sample

B. A self-selected sample

C. A systematic sample

D. A random sample

Can someone me with this problem i don't understand i need

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.