Mr. Hou picked every fifth parent that dropped off their kid.

What type of sample did he form?

A. simple random sample

B. systematic random sample

Cbiased sample

D. convenience sample

Me answer this question: -2/3p + 1/5 - 1 + 5/6p i think the simplified expression is 1/6p - 4/5 correct me if i'm wrong, and explain it! if i have it right, just tell me. you so

What is the midpoint of np if n (1,9) and p (-5-1)

The perimeter of △cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.