3 years ago

Why is every prime number greater than 2 an odd number?

Mathematics

1 answer:

DanielleElmas [232]3 years ago

5 0

Every prime greater than 2 is oddNo even number greater than 2 is prime

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The store has 28 notebooks in packs of 4. Three packs of notebooks are sold. How many packs of notebooks are left?

loris [4]

28 divided by 4= 7
7-3=4

answer: 4 notebooks left.

6 0

3 years ago

Read 2 more answers

Please help! What is the function for the graph

Evgen [1.6K]

When x = 0 the value of the function is 2 so its either A or B.

When x = 1, y = 8 so substituting these values in A we get:-

8 = 2 * 8^1 = 16 so

its Not A. Try B:-

8 = 2 *4^1 = 8 which fits

Answer is choice B

7 0

3 years ago

The population of a certain community is known to increase at a rate proportional to the number of people present at time t. If

attashe74 [19]

Answer:

$t=7.85 years$

Step-by-step explanation:

We can write this rate as an ordinary differential equation.

$\frac{dP}{dt}=aP$

Where a is proportional constant, P the population variable, and t the time.

$\frac{dP}{P}=adt$

Integrating each side of the equation.

$\int \frac{dP}{P}=\int adt$

$ln(P)=at+c$

$P=e^{at+c}$

$P=e^{c}e^{at}=Ce^{at}$

To find C we need to use the initial condiction, it means evaluae P at t=0.

$P_{0}=Ce^{0}=C$

$P=P_{0}e^{at}$

Now, we use the sentence the population has doubled in 5 years.

$2P_{0}=P_{0}e^{a5}$

We can find "a" in this condition.

$2=e^{a5}$

$ln(2)=a5$

$a=\frac{ln(2)}{5}$

$a=0.14$

Finally, let's find how long will it take to triple.

$3P_{0}=P_{0}e^{0.14t}$

$3=e^{0.14t}$

$t=\frac{ln(3)}{0.14}$

$t=7.85 years$

I hope it helps you!

4 0

2 years ago

What is the difference of the two expressions shown below (3/4X+2)-(1/4x+5). Explain why

Nostrana [21]

Answer:

D. 1/2x - 3

Step-by-step explanation:

(3/4x + 2) - (1/4x + 5) =
3/4x - 1/4x + 2 - 5 =
2/4x - 3 =
1/2x - 3

Correct choice is D

5 0

3 years ago

Let a = 3; x = 2<br><br>c) y = ( a * x ) * x * ( x + 7 )

Molodets [167]

Step-by-step explanation:

please mark me as brainlest

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3 years ago