3 years ago

The effect of the time of day a science class is taught on test scores is being

Mathematics

2 answers:

Rudiy273 years ago

7 0

Answer:

the answer is C. Direct Control

Step-by-step explanation:

giving each student the same test is something being controlled directly by the scientist/reasearcher

can't be randomization as it is not random

can't be replication as nothing is being replicated/duplicated

Talja [164]3 years ago

4 0

I think the answer is c.

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Sergeu [11.5K]

Answer:

Perimeter of square Q is 49 inches.

Step-by-step explanation:

Let x be the length of side of square P and y be that of square Q.

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$\frac{x}{y}=\frac{2}{7}$

Also it is given that x=3.5 inches.Hence

$\frac{3.5}{y}=\frac{2}{7}$

∴ y=12.25 inches.

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3 years ago

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valentina_108 [34]

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Step-by-step explanation:

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4 years ago

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Dmitrij [34]

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3 years ago

What is an an expression that is equivalent to 9 ( 3x + 5 + x ) without using parentheses.

torisob [31]

Answer:

27x + 45 + 9x

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Step-by-step explanation:

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2 years ago

A model airplane is 20 inches long and 4 inches wide. If the actual width of the airplane is 20 feet what is the lenght of the a

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