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Alex17521 [72]
2 years ago
11

Use the model to find the missing number in the pair of equivalent expressions.

Mathematics
1 answer:
Anastaziya [24]2 years ago
4 0

Answer:

3

Reasoning:

3(5+3)=15+9

Distribute three to the numbers to get 15+9.

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A biologist was interested in determining whether sunflower seedlings treated with and an extract from Vinca minor roots resulte
Aleksandr-060686 [28]

Answer:

Kindly check explanation

Step-by-step explanation:

H0 : μ = 15.7

H1 : μ < 15.7

This is a one sample t test :

Test statistic = (xbar - μ) ÷ (s/√(n))

n = sample size = 33

Using calculator :

The sample mean, xbar = 15.41

The sample standard deviation, s = 0.419

Test statistic = (15.41 - 15.70) ÷ (0.419/√(33))

Test statistic = - 3.976

Using the Pvalue calculator :

Degree of freedom, df = n - 1 ; 33 - 1 = 32

Pvalue(-3.976, 32) = 0.000187

Decison region :

Reject H0 if Pvalue < α

Since Pvalue < α ; we reject H0

There is significant evidence to conclude that the true average height of the seedlings treated with an extract from Vinca minor roots is less than 15.7 cm.

4 0
2 years ago
Identify the terms themselves for the following expression. (separate ur terms with a comma)
Zinaida [17]
3a, 5b, -6y, 10 hope this helps
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3 years ago
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What is the arc length S what is shown below?
Solnce55 [7]

Answer:

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Step-by-step explanation:

The applicable formula is ...

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3 0
2 years ago
PLEASE HELP!!!!!!
Montano1993 [528]

Answer:

Yes. In general, the set of rational numbers is closed under addition, subtraction, and multiplication; and the set of rational numbers without zero is closed under division.

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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