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3 years ago

Which expression gives the distance between the points (2, 5) and (-4, 8)?

1 answer:

8 0

D between points (x1,y1) and (x2,y2) is
$D= \sqrt{(x2-x1)^2+(y2-y1)^2}$
given
(2,5) and (-4,8)

$D= \sqrt{(-4-2)^2+(8-5)^2}$
$D= \sqrt{(-6)^2+(3)^2}$
$D= \sqrt{36+9}$
$D= \sqrt{45}$
D=(√9)(√5)
D=3√5

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Find what n equals 8(2n-2) = 4 - 4n (explanation please)

slavikrds [6]

Answer:

$\huge\boxed{n=1}$

Step-by-step explanation:

In order to find the value of n that satisfies this equation, we can perform a series of algebraic steps on it to solve for n.

$8(2n-2) = 4- 4n$
<em>Distribute in the 8 on the left side:</em>
<em /> $16n-16=4-4n$ <em> </em>
<em>Add 4n to both sides</em>
$20n-16=4$
<em>Add 16 to both sides</em>
$20n = 20$
<em>Divide both sides by 20</em>
$n=1$

Therefore, n=1 is the value of n that satisfies this equation.

Hope this helped!

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2 years ago

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Nicholas wrote the steps below to simplify the fraction 20/30 find his error and correct it

Dmitrij [34]

Unfortunately, Nicholas' steps in simplifying the fraction is not reflected in the question. However, the general idea of the simplifying fraction is to find the greatest common factor (GCF) of both the numerator and the denominator. In this case, the GCF is 10. Then, divide both numbers by the GCF. The answer for this item should be 2/3.

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3 years ago

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Select the correct answer. This graph represents a quadratic function. What is the value of a in this function’s equation?

Aloiza [94]

Answer:

i'm not sure but i think the answer is D

Step-by-step explanation:

the answer will be either A or D because the shape of the graph shows that the value of a is negative

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3 years ago

You believe that eating an apple a day is healthy and want to design an experiment to find out. You have available 40 volunteers

Gwar [14]

The best design for this experiment would be a repeated measures design. This is ideal to determine if eating an apple makes you healthy.

<h3>What is an experimental design?</h3>

An experimental design refers to the general structure of an experiment including how people are distributed into the control and experimental group to test a specific phenomenon.

<h3>What is a repeated measures design?</h3>

In a repeated measures design all participants are both parts of the control group, in this case, people who do not eat apples, and the experimental group, or people who eat apples.

<h3>What does this design imply?</h3>

In the case of determining if eating an apple every day, this design implies:

All participants will be asked to not eat apples every day for a specific period such as one or two months, and health levels will be measured during this time.
After the first step, all participants will be asked to eat an apple every day during the period, and their health will be measured.
The researcher can compare the results of each participant, which is more accurate than comparing one participant to another.

Learn more about experiments in: brainly.com/question/1452319

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2 years ago

Help please, don't answer if you don't know. ill give brainiest

mixer [17]

Answer:

Width = 9 km

Step-by-step explanation:

Area is length*width, so to find the width, you divide the area by the length. 63/7 is 9.

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2 years ago