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.
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;
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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.
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
[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
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
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
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
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
Answer:
257% as a decimal is 2.57
0.003 as a percentage is 0.3%
I need it asap thanks
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)
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
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
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
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
Solve 6 + 4x - x², by method of completing the square. (Do not use quadratic formula or factoring. Show your working)
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
Help I have a time limit
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”
Answer:
50multiply8=400grams
Graph f(x) = -2/3x-3
PLS ANSWER AND SHOW HOW ITS GRAPHED
Answer:
Graph and solved
Step-by-step explanation:
Help pls!!!!!!!!!!!!!!!!!!
Answer:
I can't see the file
Step-by-step explanation:
10 to the 2 power in fraction form
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?
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
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
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:
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
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
Answer:
4
Step-by-step explanation:
i think
Solve the following
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
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.
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................
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.
Answer:
so this is what i think im not sure but ot will be seven dived by two . i hope this works