which sampling method is generally considered the weakest?

a.
cluster sampling

b.
random sampling

c.
convenience sampling

d.
stratified sampling

Which of the binomials below is a factor of this trinominal? x^2-13+30

For what values of x is x2 + 2x = 24 true?

Astore has apples on sale for three dollars or 2 pounds how many pounds of apples can you buy for nine dollars if an apple is approximately 5 ounces how many apples can you buy for nine dollars