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Tanzania [10]
3 years ago
9

there are 45 students in the six grade at garden valley middle school. nine of them have freckles. what is the ratio 26 graders

with freckles to the total numbers of the six graders? brainly
Mathematics
2 answers:
ArbitrLikvidat [17]3 years ago
8 0

Answer:

The ratio graders with freckles to the total numbers of the six graders is 1/5

Step-by-step explanation:

The ratio represents how many units are of one kind every another kind.  

In this case ,  we are comparing students that have fleckles with all the students of six grade. Nine  students have freckles from the 45 students in the six grade. To get the ratio we divide both amounts.

Ratio= 9/45 if we divide both members by 9

Ratio= 1/5

Vlada [557]3 years ago
3 0
There are 45 students in total, and 9 of them have freckles. So you can say 9 out of 45 students have freckles. You can write this 3 ways.

9:45

\frac{9}{45}

9 to 45

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vagabundo [1.1K]

The <em>missing</em> angle of the <em>right</em> triangle ABC has a measure of 30°. (Correct answer: A)

<h3>How to find a missing angle by triangle properties</h3>

Triangles are <em>geometrical</em> figures formed by three sides and whose sum of <em>internal</em> angles equals 180°. There are two kind of triangles existing in this question: (i) <em>Right</em> triangles, (ii) <em>Isosceles</em> triangles.

<em>Right</em> triangles are triangles which one of its angles equals 90° and <em>isosceles</em> triangles are triangles which two of its sides have <em>equal</em> measures.

According to the statement, we know that triangle BQR is an <em>isosceles</em> triangle, whereas triangles ABC, ANB and NBC are <em>right</em> triangles. Based on the figure attached below, we have the following system of <em>linear</em> equations based on <em>right</em> triangles ABC and NBC:

<em>2 · x + 90 + θ = 180</em>   (1)

<em>(90 - x) + 90 + θ = 180</em>   (2)

By equalizing (1) and (2) we solve the system for <em>x</em>:

<em>2 · x = 90 - x</em>

<em>3 · x = 90</em>

<em>x = 30</em>

And by (1) we solve the system for <em>θ</em>:

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<em />

The <em>missing</em> angle of the <em>right</em> triangle ABC has a measure of 30°. (Correct answer: A) \blacksquare

To learn more on right triangles, we kindly invite to check this verified question: brainly.com/question/6322314

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2 years ago
A regression was run to determine if there is a relationship between hours of TV watched per day (x) and number of situps a pers
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Answer:

A person who watches 8.5 hours of TV can do 30.4 sit ups.

Step-by-step explanation:

The regression equation is used to predict or estimate the value of the response (or dependent) variables using the information about the explanatory (or predictor) variables.

The general form of a regression equation is:

y=ax+b

Here,

<em>y</em> = dependent variable

<em>x</em> = independent variable

<em>a</em> = intercept

<em>b</em> = slope

The regression equation representing the relationship between hours of TV watched per day (<em>x</em>) and number of sit ups a person can do (<em>y</em>) is:

y=-0.74x+36.359

Compute the number of sit ups a person who watches 8.5 hours of TV can do as follows:

y=-0.74x+36.359

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Find the diagram attached.

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