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Phoenix [80]
3 years ago
6

Multiply (x+2y)(x^2-xy+3y)

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
8 0

Answer:

-2xy^2+x^2y+x^3+6y^2+3xy

Step-by-step explanation:

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If I have 5 and a half gallons of water and each half gallon needs a pack of salt. how many salt packs do I need?
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Suppose a researcher is testing a new vaccine on mice to see how well it prevents the flu virus. The lab has 1000 mice available
AfilCa [17]

Solution :

Sampling may be defined as the technique of selecting the individual members or the subset of the population to make a statistical inferences and estimates the characteristics of the entire population.

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In the context, the sampling methods for each of the descriptions are :

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   --- Simple Random

b). The researcher chose the 1st 30 mice as she can reach the door to the mouse room

   --- Convenience sampling

c). The mice those whose are kept in the cages on 10 various shelves in mouse room. The researcher or the experimenter chose the three mice from each shelve.

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e). The researcher generates the list of the identification numbers which has been sorted from the smallest to the largest. The researcher randomly picks 1 mouse form the list and selects every 4 mouse until the researcher has 30 mice.

 ---- Systematic sampling

7 0
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