In an effort to learn more about the wild lemur population in Madagascar, a researcher wants to collect a sample. Which statement is true? A. The researcher can assign each lemur a number and then use systematic sampling.
B. It is possible to collect a simple random sample of all wild lemurs in Madagascar.
C. Sample bias is inevitable because the researcher can only collect a convenience sample.
D. To reduce time and cost, the researcher must collect a volunteer sample.

Add the fractions and simplify 1/2+ 1/3

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.

What is the anwers for 9+2x=5x-3-x