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Pavlova-9 [17]
3 years ago
6

The ratio of the number of boys to girls is 5 to 4. There are 60 girls in the choir. How many boys are in the choir?

Mathematics
1 answer:
sergiy2304 [10]3 years ago
7 0

Answer:

48

Step-by-step explanation:

5      60

--  =  ----

4      x

5x= 240

---    ------

5       5

x=48

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In what situation would you use an ANOVA statistical test over T-test?
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Step-by-step explanation:

when means of more than two groups are to be compared, ANOVA is perferred

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Consider college officials in admissions registration, counseling, financial aid campus ministry, food services, and so on. How
andre [41]

Since sample size is > 40, we use the z-score in calculating for the confidence interval.

The formula is given as:

Confidence Interval = X ± z * σ / sqrt (n)

Where,

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z = z-score which is taken from standard distribution tables at 90% confidence interval = 1.645

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5 0
3 years ago
He graph of the function f(x) = –(x + 6)(x + 2) is shown below.
Molodets [167]

The domain of the function is all real numbers, the range of a function is y ≤ 4

<h3>What is a function?</h3>

It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.

We have a function:

f(x) = –(x + 6)(x + 2)

If we plot this function on the coordinate plane, we will see it is a graph of a quadratic function.

Here the no other details are given.

But we can say:

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  • The x-axis intercept will be at (-6, 0) and (-2, 0).

Thus, the domain of the function is all real numbers, the range of a function is y ≤ 4

Learn more about the function here:

brainly.com/question/5245372

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Step-by-step explanation:

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