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e-lub [12.9K]
3 years ago
15

Which of the following are identities?

Mathematics
2 answers:
777dan777 [17]3 years ago
4 0

Answer:

all of them

Step-by-step explanation:

work out + simplify the left side and you will get the same as the right side

Nuetrik [128]3 years ago
4 0

Answer:

The answer is 2 because they are similar it is just that the one at the side is factorised

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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

7 0
2 years ago
2 – (–8) + (–3) = ???????????????
Lana71 [14]
The answer would be 7 the two parenthesis become a positive 
5 0
3 years ago
Read 2 more answers
What is the value of 3-(-2)?
Fed [463]

Answer:

6

Step-by-step explanation:

distribute the negative to ger 3(2), since a negative times a negative is positive. Then just multiply

6 0
3 years ago
Hannah has information about an object in circular orbit around Earth. MEarth = 6. 0 × 1024 kg G = 6. 67 × 10–11 StartFraction m
castortr0y [4]

In order to calculate the tangential speed of the orbiting object   Hannah need the distance of the orbiting object to Earth.

<h3>What is the tangential speed of the object?</h3>

The tangential speed of an object is the linear component of the speed, which is moving in a circular path.

In terms of  the gravitation constant, the tangential speed can be given as,

v=\sqrt{\dfrac{Gm}{r}}

Here, {<em>G</em>} is the gravitation constant, (<em>m</em>) is the mass and (<em>r</em>) is the radius.

Hannah has information about an object in circular orbit around Earth.

The mass of the earth is.

m_E=6. 0 \times10^{24} kg

The value of gravitational constant is,

G=6. 67\times 10{-11}\rm Nm^2/kg^2

The radius of the earth is,

r_E=6. 0 \times 10^6 \rm m

Here, only the distance of the orbiting object to Earth is need to find the tangential speed of the object.

Hence, in order to calculate the tangential speed of the orbiting object   Hannah need the distance of the orbiting object to Earth.

Learn more about the tangential speed here;

brainly.com/question/4933588

7 0
2 years ago
Someone help me out pleasee
Vanyuwa [196]

Answer:

-23

Step-by-step explanation:

The discriminant is the number inside of the radical of the quadratic formula.

5 0
3 years ago
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