What is the value of f(x) = 2 • 2x for f(–2)?


–0.50

0.0625

0.25

0.50

Answers

Answer 1

Step-by-step explanation:

[tex]f(x) = 2. {2}^{x} [/tex]

[tex]f( - 2) = 2. {2}^{ - 2} [/tex]

[tex]f( - 2) = 2. \frac{1}{ {2}^{2} } [/tex]

[tex]f( - 2) = \frac{2}{4} [/tex]

[tex]f( - 2) = 0,5[/tex]

The answer is D.

Answer 2

The value of f(x) = 2*[tex]2^{x}[/tex] when x = -2 is 0.5

What is a function?

An expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).

Given that a function,  f(x) = 2*[tex]2^{x}[/tex]

f(-2) = 2*[tex]2^{-2}[/tex]

= 2*1/2²

= 2/4

= 0.5

Hence, The value of f(x) = 2*[tex]2^{x}[/tex] when x = -2 is 0.5

For more references on function, click;

https://brainly.com/question/5975436

#SPJ5


Related Questions

2. The electrical resistance R of a wire varies inversely with the square of its diameter d. If a wire with a

diameter of 3 millimeters has a resistance of 0.4 ohm, find the resistance of a wire having the same

length and a diameter of 8 millimeters.

Answers

Answer:

[tex]0.225 \Omega =225 m\Omega[/tex]

Step-by-step explanation:

We know (Ohm second law) that [tex]R= \frac{k}{d^2}[/tex] where k inlcudes the rest of the parameters (material, lenght). In our situation we have k= [tex]0.4\cdot9 \Omega mm^2[/tex]. The moment the diameter becomes 8mm R becomes

[tex]R= {{0.4\cdot 9}\over{16}} \Omega = 0.225 \Omega[/tex]

Please solve and explain part a

Answers

Solution:

[tex]2 \times {10}^{0} \\ = 2 \times 1 \\ = 2[/tex]

Answer:

You should circle 2 in the units place.

Hope it helps.

Do comment if you have any query.

Answer:

222.222

Step-by-step explanation:

[tex] \\ \tt2 \times {10}^{0} [/tex]

[tex] \\ \tt = 2 \times 1[/tex]

[tex] \\ \tt = 2[/tex]

Anna has 128 trees in her garden. 16 of the trees are apple trees.

What percentage of the trees in the garden are apple trees

Answers

Answer:

12.5%

Step-by-step explanation:

To change a fraction to o percentage , multiply by 100% , so

[tex]\frac{16}{128}[/tex] × 100%

= 0.125 × 100%

= 12.5%

solve using quadratic formula x^2-5x+4=0

Answers

Answer: x = 4,1

Step-by-step explanation:

Answer:

x = 4 or x = 1

Step-by-step explanation:

x² - 5x + 4 = 0

⇒ x² - 4x - x + 4 = 0

⇒ x (x - 4) - 1 (x - 4) = 0

⇒(x - 4)(x - 1) = 0

Therefore,

x - 4 = 0

⇒ x = 4

Again.

x - 1 = 0

⇒ x = 1

Hence, x = 4 or x = 1 :)

help with this question

Answers

The answer is B and C

3. About 31% of the people who come to the park bring a dog. One third of people who come to the park
exercise. Which group of people represents a larger percent of the people coming to the park

Answers

Let all people be 100%

Now

People bring dog=31%

1/3rd of people

[tex]\\ \sf\longmapsto 100/3=33.3\%[/tex]

Second group people has larger percentage

solve pls brainliest

Answers

Answer:

257% as a decimal is 2.57

0.003 as a percentage is 0.3%

2.57 is the decimal and 0.3 percent

I need it asap thanks

Answers

Answer:

Point-slope form: y - 3 = -6/5 (x + 5)

Slope-intercept form: y = -6/5x - 3

Find the slope of the line passing though the points (-7,7) and(-7,-4)

Answers

Answer:

the slope is undefined because it's a vertical line

What is the volume of a sphere with a radius of 4,4 cm, rounded to the nearest tenth
of a cubic centimeter?
223.8
294.4
0 299.1
O 356.8

Answers

Answer:

356.8 cm³

Step-by-step explanation:

Volume Sphere = [tex]\frac{4\pi r^3}{3}[/tex]

                          = [tex]\frac{4\pi *4.4^3}{3}[/tex]

                          = [tex]\frac{4\pi *85.184}{3}[/tex]

                          =  [tex]\frac{340.736\pi}{3}[/tex]

                          = 113.58π ≈ 356.8

-Chetan K

I’m assuming by 4,4 you mean 4.4 cm, in that case, we start of by cubing the radius, and get 85.184, then multiply it by 4/3 to get 113.58, then multiply that by pi and get 356.82 or rounded to the nearest tenth 356.8.


What is the product?

(-6a^3b+ 2ab^2)(5a^2- 2ab^2-b)

A. -30a + 12ab2 +6ab+
10a2b2-4ab" - 2ab2

B. -30a5b+ 12ab + 16ab2-4a²b4-2ab3

C. 30a5b-12ab +4ab2-4a2b4-2ab

D. 30ab- 12ab2- 6ab+ 10a2b2- 4ab4 - 2ab2

Answers

Answer:

-30a^5b + 12a^4b^3 + 16a^3b^2 - 4a^2b^4 - 2 ab^3

Step-by-step explanation:

How is 0.034 read it word form

Answers

Zero point zero three four


Solve 6 + 4x - x², by method of completing the square. (Do not use quadratic formula or factoring. Show your working)

Answers

Answer:

6+4-x^2

Step-by-step explanation:

10-x^2

-x^2+10 is the answer

solve for x. round to the nearest tenth of a degree, if necessary

Answers

Okay but where is the problem?

Help I have a time limit

Answers

Answer:

The answer is A

Step-by-step explanation:

7^2=49 10^2=100

49+100 = 149

sqrt(149)

Answer:

A) [tex]\sqrt{149}[/tex]

Step-by-step explanation:

Pythagorean Theorem: [tex]c^{2}[/tex] = [tex]a^{2}[/tex] + [tex]b^{2}[/tex]

c² = a² + b²

c² = 7² + 10²

c² = 49 + 100

c² = 149

c = [tex]\sqrt{149}[/tex]

“The total weight of 50 identical marbles”

Answers

Answer:

50multiply8=400grams

Graph f(x) = -2/3x-3
PLS ANSWER AND SHOW HOW ITS GRAPHED ​

Answers

Answer:

Graph and solved

Step-by-step explanation:

Help pls!!!!!!!!!!!!!!!!!!

Answers

Answer:

I can't see the file

Step-by-step explanation:

10 to the 2 power in fraction form

Answers

Answer

5

to per power

Step-by-step explanation:

Convert to a decimal by dividing the numerator by the denominator.

Hey there!

10^2

= 10 * 10

= 100

Therefore, your answer should be: 100

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

The variable f varies inversely as the square root of g. When f = 4, g = 4. Jordan’s work finding the value of f when g = 100 is shown: f = k 4(4) = k 16 = k f = 16 f = 16 10f = 16 f = 1.6 What is the first error, if any, in Jordan’s work?

Answers

Variation can be direct, inverse or jointly

Jordan's first error is that he incorrectly calculated the value of proportionality constant

From the question, we understand that f varies directly as the square root of g.

This variation is represented as:

[tex]\mathbf{ f\ \alpha\ \frac{1}{\sqrt{g}}}[/tex]

Express as a equation

[tex]\mathbf{ f\ \ =\ k\frac{1}{\sqrt{g}}}[/tex]

When f = 4, k = 4.

So, we have:

[tex]\mathbf{ 4\ \ =\ k\frac{1}{\sqrt{4}}}[/tex]

[tex]\mathbf{ 4\ \ =\ \frac{k}{2}}[/tex]

Multiply both sides by 2

[tex]\mathbf{ k = 8}[/tex]

When g = 100, we have:

[tex]\mathbf{ f\ \ =\ k\frac{1}{\sqrt{g}}}[/tex]

[tex]\mathbf{ f\ \ =\ 8 \times \frac{1}{\sqrt{100}}}[/tex]

[tex]\mathbf{ f\ \ =\ 8 \times \frac{1}{10}}[/tex]

[tex]\mathbf{ f\ \ = 0.8}[/tex]

This means that, Jordan incorrectly calculated the value of proportionality constant

Read more about variation at:

https://brainly.com/question/1698891

The temperature at 6 a.m. is −4∘F. The temperature is expected to increase 2∘F per hour until 3 p.m. Which equation represents this situation, where x represents the number of hours past 6 a.m., and y is the temperature at that hour?

y=2x+4

y= -4x+2

y=2x-4

y=4x-2

Answers

Answer:

C

Step-by-step explanation:

hope it helps

would appreciate brainly

Answer:

C!

Step-by-step explanation:

Solve the Quadratic equation
8n²-56=48n

Answers

Answer:

n = {-1, 7}

Step-by-step explanation:

8n² - 56 = 48n

Subtract 48n from both sides

8n² - 48n - 56 = 0

Divide both sides by 8

n² - 6n - 7 = 0

Factor

alternately use the quadratic equation or complete the square

(n - 7)(n + 1) = 0

n = {-1, 7}

the x-intercept of the graph of f(x)=3log(x-5)+2 is:

Answers

Answer:

C

Step-by-step explanation:

To find the x- intercept let f(x) = 0 , then

3log(x - 5) + 2 = 0 ( subtract 2 from both sides )

3log(x - 5) = - 2 ( divide both sides by 3 )

log(x - 5) = - [tex]\frac{2}{3}[/tex] , then

x - 5 = [tex]10^{-\frac{2}{3} }[/tex] ( add 5 to both sides )

x = [tex]10^{-\frac{2}{3} }[/tex] + 5 → C

what is the sum of 25.234 and 14.454

Answers

Answer :

What is the sum of 25.234 and 14.454

25.234

14.454

_______ +

39.688

25.234 + 14.454 = 39.688 ✔️

all of the following are equivalent except ____

1. (-1)^4
2. -1
3. 4^0
4. 1​

Answers

Answer:

4

Step-by-step explanation:

i think

Solve the following

Answers

b) x=4.5
c) x=35
d) x=13

Answer:

b) 2x=9=>x=9/2=4.5

c)x/5=7=>x=5×7=35

d)x/2=6.5=>x=6.5×2=13

Help please help I really need help

Answers

Answer:

i can barely see this...can you make it bigger then i can figure out what o do so i can give you the answer......

Step-by-step explanation:

Find the value of a/b when a=$13. 93 and B=0. 07
Thank you.

Answers

Answer:

10

Step-by-step explanation:

A = 7, B = 2

7 = 2 * 3 + 1

7 mod 2 = 1

A = 8, B = 4

8 = 4 * 2 + 0

8 mod 4 = 0

A = 13, B = 5

13 = 5 * 2 + 3

13 mod 5 = 3

A = -16, B = 26

-16 = 26 * -1 + 10

-16 mod 26 = 10

y^2 -y-2 help me................

Answers

Answer:

hope it helps you............

[tex]\bold{Hewo!!}[/tex]

--------------------------

ANSWER :[tex]\sf{=(y~+~1)~(y-2)[/tex]EXPLANATION :

[tex]\sf{Factor~y^2 - y-2:}~(y~+~1)~(y-2)[/tex]

[tex]\sf{y^2-y-2}[/tex]

[tex]\sf{Break~the~expression~into~groups:}[/tex]

[tex]\sf{=(y^2~+~y)~+~(-2y-2)[/tex]

[tex]\sf{Factor~out~y~from~y^2~+~y:~y(y~+~1)[/tex]

[tex]\sf{Factor~out~-2~from~-2y-2:~-2(y~+~1)[/tex]

[tex]\sf{=y(y~+~1) -2(y~+~1)[/tex]

[tex]\sf{Factor~out~common~term~y~+~1}[/tex]

[tex]\sf{=(y~+~1)~(y-2)}[/tex]

Hope It Helps !

#LearnWithBrainly

[tex]\underline{\large\huge{\mathfrak{Answer~:}}}[/tex]

[tex]\sf{Miwsow}[/tex]

Explain the equivalence of 7 divided by 2 or 7/2and using words.

Answers

Answer:

so this is what i think im not sure but ot will be seven dived by two . i hope this works

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