# What is the value of 4a? when a= 3?

2 months ago

Guest #5493633
2 months ago

12

Explanation:

4x3 is 12

## Solution 2

Guest #5493634
2 months ago

To solve this simple expression you must substitute for the number you are given, so, 3.

4 -> 4 3

Now, when numbers are next to each other like this, they are always multiplied. So, the find the answer you would multiply 4 times 3...

4 x 3 = 12

So, you answer will be 12!

## 📚 Related Questions

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I honestly love this subject because its so intersting

Explanation:

Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors.

Example:

When you look at a Goldfish, you see the color orange. But that is not the case. What is happening is the goldfish's scales are absorbing all the colors exept orange, the color orange is bouncing off the scales and into our eyes, and thats what we see. Black is regecting all colors and white is absorbing it all.

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Which of the following is an example of an electric force acting at a distance?
Solution 1

Pam rubs a glass rod with wool, then moves the rod over a pile of small paper scraps. The scraps leap into the air and stick to the rod.

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The electric force acting at a distance can be observed when someone rubs a glass rod with something woolen then the rod is taken away from the woolen material. The piece of paper leaps into air and sticks on to the rod. This is due to the electrostatic force of attraction that the paper sticks on the glass rod.

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Question
How do mutations affect natural selection? A: They slow down the process B: They prevent organisms from evolving C: reproduce They affect how likely an organism is to survive and reproduce D: They are the leading cause of extinction
Solution 1

Answer:The process by which modern organisms have descended from ancient organisms over time

Common ancestor An ancestor shared by two or more descendant species

Natural selection Evolutionary mechanism in which individuals that are better suited to their environment survive and reproduce most successfully

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Light colored mice are more easily seen by predators and are therefore preyed upon more. Dark mice are better adapted to their environment and better able to survive and reproduce.

Light colored mice are more easily seen by predators and are therefore preyed upon more. Dark mice are better adapted to their environment and better able to survive and reproduce.

Natural selection acting on mice population over time.

Individuals have variations within their heritable traits. Some variations make an individual better suited to survive and reproduce in their environment.

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The population will not only evolve (change in its genetic makeup and inherited traits), but will evolve in such a way that it becomes adapted, or better-suited, to its environment.

Artificial selection

There are other types of selection, in addition to natural selection, that are out there in the world.

Artificial selection, also called "selective breeding”, is where humans select for desirable traits in agricultural products or animals, rather than leaving the species to evolve and change gradually without human interference, like in natural selection.

A timeline showing how dogs became domesticated over a long period of time due to artificial selection.

A timeline showing how dogs became domesticated over a long period of time due to artificial selection.

Dog breeding is a perfect example of how humans select for desirable or fashionable traits. Breeders deliberately mate parents with the hope of producing offspring with specific traits (such as color, size, ear shape, snout length, and so on).

Common mistakes and misconceptions

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Natural selection depends on the environment. Natural selection doesn't favor traits that are somehow inherently superior. Instead, it favors traits that are beneficial in a specific environment. Traits that are helpful in one environment might actually be harmful in another.

Explanation:

Solution 2

C

Explanation:

It is C

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What are van allen belts?
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A Van Allen radiation belt is a zone of energetic charged particles, most of which originate from the solar wind, that are captured by and held around a planet by that planet's magnetic field. Earth has two such belts, and sometimes others may be temporarily created

Explanation:

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Solution 1
The answer should be D since DNA is written in codes which can be rearranged like letters to a word
Question
Why do light-fur mice survive less often on dark rocks, compared to dark- figure mice?
Solution 1

Light-fur mice survive less often on dark rocks, compared to dark- figure mice because light - mice are easily seen by predators, while dark - figure are not easily seen by predators.

### What is predator ?

Any species that preys on other animals and survives by killing and devouring them. Predators such as wolves and bears. Rabbit population is regulated by large carnivores.

Predators are living things that go for and kill prey. The term "prey" refers to the living things that predators eat. Both carnivores and omnivores may be predators. Predators including lions, tigers, sharks, and snakes.

Thus, Light-fur mice survive less often on dark rocks, compared to dark- figure mice because light - mice are easily seen by predators, while dark - figure are not easily seen by predators.

brainly.com/question/28871161

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Solution 2

Light fur mice can be easily spotted by predators among the dark rocks

Question
How many moles of NH3 can be produced from 26.0 mol of H2 and excess N2 ? Express the number of moles to three significant figures.
Solution 1

### 17.3 moles of NH₃ were produced.

The reaction above talks about the production of ammonia NH₃

To solve this question, we'll begin by writing the balanced equation for the reaction between H₂ and N₂. This is illustrated below:

3H₂ + N₂ —> 2NH₃

From the balanced equation above,

3 moles of H₂ reacted to produce 2 moles of NH₃.

Therefore, 26 moles of H₂ will react to produce = (26 × 2)/3 = 17.3 moles of NH₃.

Thus, 17.3 moles of NH₃ were obtained from the reaction.

Solution 2

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3H2 + N2 <.........> 2NH3Explanation:

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Why do earthquakes occur more often in some countries than in others?
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Question
Name and symbol for the first 20 elements.​
Solution 1

H - Hydrogen

He - Helium

Li - Lithium

Be - Beryllium

B - Boron

C - Carbon

N - Nitrogen

O - Oxygen

F - Fluorine

Ne - Neon

Na - Sodium

Mg - Magnesium

Al - Aluminum

Si - Silicon

P - Phosphorus

S - Sulfur

Cl - Chlorine

Ar - Argon

K - Potassium

Ca - Calcium

Explanation:

Solution 2

2 Helium He

3      Lithium Li

4 Beryllium Be

5 Boron B

6 Carbon C

7 Nitrogen N

8 Oxygen O

9 Fluorine F

10 Neon Ne

11 Sodium Na

12 Magnesium Mg

13 Aluminum Al

14 Silicon Si

15 Phosphorus P

16 Sulfur S

17 Chlorine Cl

18 Argon Ar

19 Potassium K

20 Calcium Ca

Explanation:

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