2 years ago

Two hundred students were polled on their preferred theme for prom. Find the approximate value of the chi-square test statistic.

Mathematics

1 answer:

Kamila [148]2 years ago

3 0

Answer:

8.37

Step-by-step explanation:

dont know but i know this is correct!

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[100+(586+40/10)]/5<19

Ksivusya [100]

Use PEMDAS. So it would then simplify to [100+(586+4)]/5<19 then continueing that it would be [100+590]/5<19 and then 690/5<19 which finally will be 138<19 and that is a valid statement

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3 years ago

Factor the expression 2x4y – 18x2y3 completely.

Annette [7]

Answer:

B. 2x2y(x – 3y)(x + 3y)

Step-by-step explanation:

$2 {x}^{4} y - 18 {x}^{2} {y}^{3} \\ = 2 {x}^{2} y( {x}^{2} - 9 {y}^{2} ) \\ = 2 {x}^{2} y \{ {x}^{2} - {(3y)}^{2} \} \\ \purple {\boxed{ \bold{ = 2 {x}^{2} y(x - 3y)(x + 3y)}}}$