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Oxana [17]
3 years ago
9

When conducting a survey, which of the following is a reason to use a random sample?1. To make cause-and-effect connections2. To

avoid bias3. No answer text provided.4. To systematically favors the correct choice over every other choice on each question
Mathematics
1 answer:
Andrews [41]3 years ago
3 0

Answer: 2. To avoid bias

Explanation:

The random sampling can be defined as the method of selecting the samples from the population of interest randomly. The main advantage of this method is to select the samples from the target population and eliminating the bias in sampling. The random sampling is least choice of sampling for research purpose as the researcher wants to choose only selected desired samples for the study.

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Based on the information marked in the diagram, ∆XYZ and ∆RST must be congruent.
saveliy_v [14]
The answer is A true
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3 years ago
What is the length of the hypotenuse?
Misha Larkins [42]
I think you have to add it or multiply it. I’m not sure
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The diagonal of a rectangle is 25 in. The width is 15 in. What is the length of the rectangle? What is the area of the rectangle
vladimir1956 [14]

Answer:

Length = 20 inches

Area = 300 inches

Step-by-step explanation:

<em><u>TO FIND THE LENGTH</u></em>

Pythagorean Theorem: 15 squared + x squared = 25 squared

                                    = 225 + x squared = 625

                                     - 225                      - 225

                                    = x squared = 400

                                find square root

                                    = x = 20 inches

                                               x = 20 inches

                                                        Length = 20 inches

<u><em>TO FIND THE AREA</em></u>

length x width

length = 20 inches

width = 15 inches

20 x 15 = 300

             Area = 300 inches

7 0
3 years ago
Fred bought 4 liters of liquid laundry detergent, 3,260 milliliters of fabric softener, and 2.3 liters of bleach. Select true or
Norma-Jean [14]

Answer:

1. False 2. False 3. True 4. False 5. True

Step-by-step explanation:

Given:

Fred bought 4 liters of liquid laundry detergent,

3,260 millilitres of fabric softener, and

2.3 liters of bleach.

Select true or false for each statement.

1. Fred bought 96 millilitres more fabric softener than bleach.

<u>Solution</u><u>:</u>

Fred bought fabric softener = 3,260 millilitres

Fred bought bleach = 2.3 liters = 2300 millilitres

1 liter = 1000 millilitres

2.3 liter = 1000 \times 2.3 = 2300 millilitres

Fred bought more fabric softer than bleach = 3,260 - 2300 = 960

Hence, it is false and actually Fred bought 960 millilitres more fabric softer than bleach.

2. Fred bought 1.95 liters more laundry detergent than bleach.

<u>Solution</u>:

Fred bought laundry detergent = 4 liters

Fred bought bleach = 2.3 liters

Fred bought more laundry detergent than bleach = 4 - 2.3 = 1.7 liters

Hence, it is false and actually Fred bought 1.7 liters more laundry detergent than bleach.

3. Fred bought 960 millilitres more fabric softener than bleach.

It is true, as solved above:

4. Fred bought 170 millilitres more laundry detergent than bleach.

<u>Solution</u>:

Solved above:

Fred bought 1.7 liters more laundry detergent than bleach.

1.7 liters = 1.7 \times 1000 = 1700 millilitres

1.7 liters = 1700 millilitres not 170 millilitres

Hence, it is false.

5. Fred bought 0.96 liters more fabric softener than bleach.

<u>Solution:</u>

Solved above:

Fred bought 960 millilitres more fabric softer than bleach.

1000 millilitres = 1 liters

1 millilitre = \frac{1}{1000}

960 millilitre =  \frac{1}{1000}\times960=\frac{960}{1000} =0.96\ liter

960 millilitres = 0.96 liter

Hence, it is true.

3 0
3 years ago
Triangle J K L is shown. Angle J K L is 120 degrees and angle K L J is 40 degrees. The length of K L is 2 and the length of J L
Veseljchak [2.6K]

Answer:

k \approx 5$ units

Step-by-step explanation:

In Triangle JKL

\angle K=120^\circ\\\angle L=40^\circ\\KL=2\\JL=k

We want to determine the approximate value of k using the law of sines.

\angle J+\angle K+\angle L=180^\circ $ (Sum of angles in a \triangle)\\\angle J+120^\circ+40^\circ=180^\circ \\\angle J=180^\circ-(120^\circ+40^\circ)=20^\circ

Using Law of Sines

\dfrac{k}{\sin K} =\dfrac{j}{\sin J} \\\dfrac{k}{\sin 120} =\dfrac{2}{\sin 20} \\k=\sin 120 \times \dfrac{2}{\sin 20}\\k=5.06\\k \approx 5$ units

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3 years ago
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