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3 years ago

Help me please……………….

Mathematics

1 answer:

olga2289 [7]3 years ago

7 0

Answer:

8 or $\frac{8}{1}$

Step-by-step explanation:

$\frac{4}{\frac{1}{2}}$ can also be written as;

4 ÷ 0.5

(0.5 is the 1/2 in decimal form)

4 ÷ 0.5 = 8

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Ciara, an ornithologist, has 444 bird feeders at separate locations. She wonders if birds are equally likely to visit each of th

dybincka [34]

The expected count of visits is the mean or average visits to each feeder

The expected count of visits to the third feeder is 87.5

<h3>How to determine the expected count of visit?</h3>

The table of values is given as:

Feeder 1 2 3 4

Observed visits 80 90 92 88

In this case, the null hypothesis implies that the visits to each feeder are uniformly distributed

So, the expected count is calculated using:

Expected count =Visits/Feeders

This gives

Expected count = 350/4

Evaluate the quotient

Expected count = 87.50

Hence, the expected count of visits to the third feeder is 87.5

Read more about chi square goodness of fit test at:

brainly.com/question/4543358

7 0

2 years ago

Tasha believes that she can rewrite the difference of 120 minus 36 as a product of the GCF of the two numbers and the difference

xz_007 [3.2K]

Answer:

GCF = 12

For the values 36, 120:

Solution by Factorization:

The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36

The factors of 120 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120

Then the greatest common factor is 12.

Pair Share:

The GCF of 120 and 36 is ======> 12

so, 120 – 36 can be written as:

12 × 10 – 12 × 3, which is 12 × (10 – 3) or 12 × 7.

Answer: ========> Therefore, Tasha is correct

Hope that helps!!!! : )

4 0

3 years ago

Calculate the determinant of this matrix step 1: what is the first step

bagirrra123 [75]

Answer:

Step 1: Rewrite the first two columns of the matrix.

Step 2: Multiply diagonally downward and diagonally upward.

Step 3: Add the downward numbers together.

Step 4: Add the upward numbers together.

Step-by-step explanation:

hope this helps ;)

7 0

3 years ago

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Please help!

Mrrafil [7]

Answer:

$\sf C. \quad \dfrac{1}{9}$

Step-by-step explanation:

<u>Addition Law for Probability</u>

$\sf P(A \cup B)=P(A)+P(B)-P(A \cap B)$

Given:

$\sf P(A)=\dfrac{1}{3}=\dfrac{3}{9}$

$\sf P(B)=\dfrac{2}{9}$

$\sf P(A \cup B)=\dfrac{4}{9}$

Substitute the given values into the formula and solve for P(A ∩ B):

$\implies \sf P(A \cup B) = P(A)+P(B)-P(A \cap B)$

$\implies \sf \dfrac{4}{9} = \sf \dfrac{3}{9}+\dfrac{2}{9}-P(A \cap B)$

$\implies \sf P(A \cap B) = \sf \dfrac{3}{9}+\dfrac{2}{9}-\dfrac{4}{9}$

$\implies \sf P(A \cap B) = \sf \dfrac{3+2-4}{9}$

$\implies \sf P(A \cap B) = \sf \dfrac{1}{9}$

4 0

1 year ago

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What is the vertex of the parabola?

Nina [5.8K]

Answer:

(0,5)

Step-by-step explanation:

3 0

3 years ago

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