pls helppppppp I give brainliest ​

Functions can be represented as equations, and equations can be represented as functions.

The number of people that started the rumor is 10

The function is represented as:

[tex]\mathbf{N(t) = \frac{400}{1 + 39e^{-0.7t}}}[/tex]

To calculate the number of people that started the rumor, we simply set t to 0.

So, we have:

[tex]\mathbf{N(0) = \frac{400}{1 + 39e^{-0.7 \times 0}}}[/tex]

Evaluate the exponent of e

[tex]\mathbf{N(0) = \frac{400}{1 + 39e^{0}}}[/tex]

Express e^0 as 1

[tex]\mathbf{N(0) = \frac{400}{1 + 39\times 1}}[/tex]

Multiply 39 and 1

[tex]\mathbf{N(0) = \frac{400}{1 + 39}}[/tex]

Add 1 and 39

[tex]\mathbf{N(0) = \frac{400}{40}}[/tex]

Divide 400 by 40

[tex]\mathbf{N(0) = 10}[/tex]

When t = 0, N(t) = 10

This means that 10 people started the rumor.

Hence, the number of people that started the rumor is 10

Read more about functions and equations at:

https://brainly.com/question/3468890

Answer:

B) 20

Step-by-step explanation:

c = √b2 + c2 - 2bc·cos(A) = 20

Have a nice day! :-)

Answer:

5

Step-by-step explanation:

|-3| = 3

2 + 3 = 5

Answer:

27.

Step-by-step explanation:

200 / 6 = 33 1/3.

Numbers which are divisible by 5 and 6 are 30, 60, 90, 120, 150 and 180.

So the total is 33 - 6 = 27.

Answer:

27

Step-by-step explanation:

27. 33-6=27

Answer: the slope would be 0

Step-by-step explanation:

Answer:

Step-by-step explanation:

0.9

Answer:

1.8÷2

18÷20

18÷20=0.9

1.8÷2=0.9

9514 1404 393

Answer:

  (4, -7)

Step-by-step explanation:

Maybe you want the solution to this system of equations.

About the easiest way to obtain it is to use a graphing calculator.

   (x, y) = (4, -7)

_____

Additional comment

Since one of the equations gives an expression for y, it is a simple matter to substitute that for y in the other equation.

  4x +(-2x +1) = 9

  2x = 8 . . . . . . . . . . subtract 1 and simplify

  x = 4

  y = -2(4) +1 = -7 . . . use the first equation to find y

Answer:

Step-by-step explanation:

Then, the total time, which is 2 hours, is equal to x plus 7x, or 8x. So the amount of time he spends in the automobile is x=1/4 hour. The distance he travels in 1/4 hour at 28 mph is 7 miles.

pls mark brainliest

Answer:

Look, this should help.

Step-by-step explanation:

Answer:

-3

Step-by-step explanation:

......................

Answer:

75

Step-by-step explanation:

he can download 2.5 songs per minute so 2.5 x 30 is 75

Answer:

Shane can download 75 songs in half an hour.

Step-by-step explanation:

use a proportion;

5 x

--- = ---

2 30

30/2 = 15

15 x 5 = 75

x = 75

Answer:

answer is 7.2

Step-by-step explanation:

0.9(15)-2.1(3)

13.5-6.3=7.2

Answer:

7.2

Step-by-step explanation:

0.9*15=13.5

2.1*3=6.3

13.5-6.3=7.2

Answer:

Helena is 31.25 meters below the sea level.

Step-by-step explanation:

0.25 x 18 = 4.5

26.75 + 4.5 = 31.25

Answer:

A

Step-by-step explanation:

yeah-ya............ right?

ANSWER:

[tex] \large\color{green}{ \tt{A. 1 / 10}}[/tex]

Solution Steps:

Least common multiple of 5 and 10 is 10. Convert 1/5 and 1/10 to fractions with denominator 10.

[tex]( \frac{2}{10} - \frac{1}{10} ) \times 3^{2} - \frac{4}{5} [/tex]

Since 2/10 and 1/10 have the same denominator, subtract them by subtracting their numerators.

[tex] \frac{2 - 1}{10} \times 3^{2} - \frac{4}{5} [/tex]

Subtract 1 from 2 to get 1.

[tex] \frac{1}{10} \times 3^{2} - \frac{4}{5} [/tex]

Calculate 3 to the power of 2 and get 9.

[tex] \frac{1}{10} \times 9 - \frac{4}{5} [/tex]

Multiply 1/10 and 9 to get 9/10.

[tex] \frac{9}{10} - \frac{4}{5} [/tex]

Least common multiple of 10 and 5 is 10. Convert 9/10 and 4/5 to fractions with denominator 10.

[tex] \frac{9}{10} - \frac{8}{10} [/tex]

Since 9/10 and 8/10 have the same denominator, subtract them by subtracting their numerators.

[tex] \frac{9 - 8}{10} [/tex]

Subtract 8 from 9 to get 1.

[tex] \large\color{green}\frac{1}{10} [/tex]

Hope It's Help

Answer:

the factored expression: 2(x + 3)

Answer:

3

Step-by-step explanation:

Hice una ecuación: 2x+4=10. Luego, reste 4 de cada lado para obtener: 2x = 6, lo que resulta en: x = 3.

a is right its 58

and in my opinion i think b would be 58*5=290 cents, since nickel is worth 5 cents.

but gotta check other people's answers

Answer:

20

Step-by-step explanation:

each time the numbers are up by 20 years

Answer:

-2

Step-by-step explanation:

You would add 4 to 2 inorder to get 6, then divide by 3 to get -2

Answer: well if I am correct, then 9/12 is equal to 3/4 so you then have to subtract 1/12 from 9/12 so 8 (8/12) would be what was taken away. (if you were to simplify 8/12 I believe that would be 2/3)

-hope that helped-

let me know if I misunderstood anything or did something wrong

Answer:

Slope of 2

Step-by-step explanation:

and the lines equation is y=2x-8

Answer:

8 x + 16

Step-by-step explanation:

math---way

Answer:

363

Step-by-step explanation:

Answer:

16x - 16

Step-by-step explanation:

Distribute the 4 to the other terms.

4(4x - 4) = 16x - 16

Answer:

Answer:

x = 115°

Step-by-step explanation:

The two angles are vertical, so x = 115°

Vertical Angles are two angles formed by the intersection of two lines. Angles that are non-adjacent to each other are congruent in degrees.

We can see that 115° and x° are formed by the intersection of two lines, and they are non-adjacent (don't share a common side) which makes them congruent in degrees.

x = 115°

-Chetan K

Answer:

4x2−12x+9=0

Step-by-step explanation:

The equation, 2x2+x+3=0, does not have a solution

The equation, x2+5x−3=0, equals -5/2+1/2√37 and -5/2+-1/2√37

The equation, x2−5x+4=0, equal 1 and 4

The equation, 4x2−12x+9=0, equals only 3/2

Hope this Helps

Answer:

  d/3

Step-by-step explanation:

For k = 8c, the concentration is ...

  S = c/x^2 + 8c/(d -x)^2

The minimum of the function will be found where its derivative is zero. The derivative with respect to x is ...

  S' = -2c/x^3 +(-2)(8c)(-x)/(d -x)^3

We are interested in the value of x that makes this zero.

  0 = -2c/x^3 +16c/(d -x)^3 . . . . . simplify slightly, set S'=0

  0 = (-2(d -x)^3 +16x^3)/(x(d -x))^3 . . . . . combine terms, divide by c

  0 = d^3 -3d^2x +3dx^2 -x^3 -8x^3 . . . . multiply by (x(d-x))^3/(-2)

  9x^3 -3dx^2 +3d^2x -d^3 = 0 . . . . . simplified cubic

Factoring by grouping, we have ...

  (9x^3 -3dx^2) +(3d^2x -d^3) = 0

  3x^2(3x -d) +d^2(3x -d) = 0

  (3x^2 +d^2)(3x -d) = 0

The solution will be found where the second of these factors is zero:

  3x -d = 0

  x = d/3

The concentration of the deposit is a minimum at x = d/3 miles.

_____

The graph shows the minimum is x = 1/3 when d = 1.

Answer:

<--------o           o------------->

         -4           2

Step-by-step explanation:

Because the sign in the inequalities is only greater than/ less than (not equal to), we know that there is an open dot on x=-4 and on x=2.

From there, we shade the area on the graph that is true to the function.  So, we can test points.

First we will test x=-5

-5<-4  --> this is true, so we will shade to the left of x=-4

Now test x=0

0<-4  --> this is false

0>2  --> this is also false, so the area between the two open dots will not be shaded

Now test x=3

3>2  --> this is true, so we will shade to the right of x=3

Answer:

[tex]F = ( \frac{9}{5}C ) + 32[/tex]

with F = xF and C = xC

=> f(x) = (9/5)x + 32

I'm sorry I can't mark the degree symbol

Step-by-step explanation:

[tex]f(x) = \frac{5}{9}(x-32) \\xC = \frac{5}{9}(xF-32) \\xC * \frac{9}{5} = \frac{5}{9}(xF-32) * \frac{9}{5} \\xC * \frac{9}{5} + 32 = xF - 32 + 32 \\\\xC * \frac{9}{5} + 32 = xF[/tex]