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3 years ago

90°

Mathematics

2 answers:

irakobra [83]3 years ago

7 0

Answer:

Step-by-step explanation:

malfutka [58]3 years ago

3 0

Answer: D) A segment = 81/4pi -81/2

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Who wins the Ksi Vs Logan Paul Rematch

yKpoI14uk [10]

Answer: Ksi

Step-by-step explanation:

5 0

3 years ago

Solve the following system of inequalities graphically on the set of axes below. State

Serhud [2]

Answer:

$(x,y) = (-1,1)$

Step-by-step explanation:

Given

$y>-2x - 1$

$y>x + 2$

Required

Solve graphically

See attachment for graph;

The black shade represents $y>-2x - 1$

While the green, represents $y>x + 2$

Next, determine the intersection points between the two lines

From the attached graph, we have:

$(x,y) = (-1,1)$

<em>Hence, the solution is:</em> $(-1,1)$

8 0

2 years ago

Describe the transformation in the figure below

Keith_Richards [23]

Answer:

A) Reflection.

Step-by-step explanation:

From the figure shown, we can see that the blue triangle is flipped about the x-axis to form the red triangle.

When an object is flipped about a line, then this transformation is called reflection about that line.

Thus, we can say that reflection is taking place in the figure shown in which the x-axis is acting like a mirror. The blue triangle is the pre-image and the red triangle is the image after reflection.

The reflection about x-axis is given by:

$Pre-image(x,y)\rightarrow Image(x,-y)$

We can check the co-ordinates of the triangles and confirm the the transformation occurring

Points of pre-image triangle:

$(0,2),(4,5),(6,2)$

Points of image triangle

$(0,-2),(4,-5),(6,-2)$

Thus, the transformation is reflection.

3 0

3 years ago

Identify the sampling techniques used, and discuss potential sources of bias (if any). Explain. In 1965, researchers used ran

crimeas [40]

Answer:

For this case, the method used would be simple random sampling since random digit dialing assumes that all possible people in the population have the same probability of being chosen.

We may have a non-response bias, because if a selected person does not choose the phone, we have no answers to the questions and there is no data available.

We may also have under coverage bias because some people may not have a phone and in this case these people would be excluded from the study

Step-by-step explanation:

For this case is important to remember the different types of sampling methods

Simple random sampling is a method where we select a sample size n and each individual in the population are equally likely to be selected.

Stratified random sampling is a method on which we select samples from subgroups of the population usually called strata.

Convinience sampling is a method that use a random number so select the sample

Cluster sampling is a method that separates the population in natural subgroups with no intersection between them and some of the groups are selected for the sample.

For this case, the method used would be simple random sampling since random digit dialing assumes that all possible people in the population have the same probability of being chosen.

Sources of bias

We may have a non-response bias, because if a selected person does not choose the phone, we have no answers to the questions and there is no data available.

We may also have under coverage bias because some people may not have a phone and in this case these people would be excluded from the study

8 0

3 years ago

A statement and portions of the flowchart proof of the statement are shown.

Sedaia [141]

In box 1, the reason that justifies the statement, m∠BAD = m∠BAC + m∠CAD, is: angle addition postulate.

<h3>What is the Angle Addition Postulate?</h3>

The angle addition postulate states that the measure of a larger angle equals the sum of smaller angles that make up the larger angle.

∠BAD comprises of ∠BAC and ∠CAD.

Therefore, based on the angle addition postulate, m∠BAD = m∠BAC + m∠CAD.

The missing reason in box 1 would be: angle addition postulate.

Learn more about angle addition postulate on: