Denise has conducted an observational study to learn about different influences that affect which colleges students choose to attend. Denise surveyed 400 students at her new college and found that 80% of the students chose their college based on a friend who also attends that college.
What conclusion can Denise make from her study?
A. There may be a link between knowing current students and choosing a college, and she can draw a cause-and-effect conclusion from an observational study.
B. There may be a link between knowing current students and choosing a college, but she cannot draw a cause-and-effect conclusion from an observational study.
C. Knowing a current student enrolled at a college causes incoming students to choose that college, but she cannot draw a cause-and-effect conclusion from an observational study.
D. Knowing a current student enrolled at a college causes incoming students to choose that college, and she can draw a cause-and-effect conclusion from an observational study.
The conclusion that Denise can make from her observational study is B. There may be a link between knowing current students and choosing a college.
What is an observational study?An observational study is a study that observes individuals and measures variables of interest but doesn't influence the responses.
In this case, Denise has conducted an observational study to learn about different influences that affect which colleges students choose to attend.
Here, the conclusion that Denise can make from her study is that there may be a link between knowing current students and choosing a college even though she cannot draw a cause-and-effect conclusion from the study.
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Find the equation of quadratic function determined from the graph below?
Step-by-step explanation:
The x-intercepts are x = -1 and x = 5, so:
y = k (x + 1) (x − 5)
The vertex is (2, -3), so:
-3 = k (2 + 1) (2 − 5)
-3 = -9k
k = 1/3
y = 1/3 (x + 1) (x − 5)
Simplifying:
y = 1/3 (x² − 4x − 5)
y = 1/3 x² − 4/3 x − 5/3
f(x) = 1 / 3 x² - 4 / 3 x - 5 / 3
using the form:
f(x) = a(x - h)² + k
The vertex coordinates are 2 and -3.
h = 2
k = - 3
therefore,
f(x) = a(x - 2)² - 3
f(x) = a(x - 2)² - 3
let's use the coordinates (-1, 0) to find a. Therefore,
0 = a(-1 - 2)² - 3
0 = 9a - 3
3 = 9a
a = 3 / 9
a = 1 / 3
let's insert the value of a in the equation.
f(x) = a(x - 2)² - 3
f(x) = 1 / 3 ( x - 2)² - 3
f(x) = 1 / 3 (x - 2)(x -2) - 3
f(x) = 1 / 3 (x² - 4x + 4) - 3
f(x) = x² / 3 - 4x / 3 + 4 / 3 - 3
f(x) = 1 / 3 x² - 4 / 3 x - 5 / 3
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seven sixteeths wrote as a decimal
Answer:
The answer is 0.4375 .
Hope this helps!
Multiple choice question?
Answer:
9* 3 ^ (x-2)
Step-by-step explanation:
g(x) = 3^x
We know a^ (b) * a^(c) = a^ (b+c)
9* 3 ^ (x+2) = 3^2 * 3 ^(x+2) = 3^(2+x+2) = 3^x+4 not equal to 3^x
3*(9^(x+2)) = 3*3^2(x+2) = 3^1 * 3^(2x+4) =3^(2x+4+1) = 3^(2x+5) not equal
9* 3 ^ (x-2) = 3^2 * 3 ^(x-2) = 3^(2+x-2) = 3^x equal to 3^x
3*(9^(x-2)) = 3*3^2(x-2) = 3^1 * 3^(2x-4) =3^(2x-4+1) = 3^(2x-3) not equal
13, 29, 427, 881
Is the sequence geometric? If so, identify the common ratio.
Final answer:
The sequence 13, 29, 427, 881 is not geometric because each term is not obtained by multiplying the previous term by a constant ratio. The ratios between successive terms vary, so there is no common ratio.
Explanation:
Is the sequence 13, 29, 427, 881 geometric? To determine if a sequence is geometric, each term should be obtained by multiplying the previous term by a constant number, known as the common ratio.
Let's calculate the ratios between successive terms:
Ratio from 13 to 29: 29 ÷ 13 = 2.23077 (approximately)Ratio from 29 to 427: 427 ÷ 29 = 14.72414 (approximately)Ratio from 427 to 881: 881 ÷ 427 = 2.06324 (approximately)Since the ratios are not the same, the sequence is not geometric. Therefore, there is no common ratio.
john is five years older than his sister. the product of their present ages is 150.
John's present age is (blank) years, and this sister's present age is (blank) years
so i believe you have to answer this with the quadratic formula but I'm not sure. please help
John's present age is 15 years, and his sister's present age is 10 years.
We have,
Let's denote John's sister's age as x.
According to the given information,
John is five years older than his sister, so John's age would be x + 5.
The product of their present ages is 150, which means:
x * (x + 5) = 150
Expanding the equation:
x² + 5x = 150
Rearranging the equation to standard quadratic form:
x² + 5x - 150 = 0
Now we can solve this quadratic equation.
Factoring or using the quadratic formula will give us the values of x, representing the sister's age.
Factoring the equation:
(x - 10)(x + 15) = 0
Setting each factor to zero:
x - 10 = 0 or x + 15 = 0
Solving for x:
x = 10 or x = -15
Since ages cannot be negative, we can discard the solution x = -15. Therefore, the sister's present age is x = 10.
John's present age is then calculated by adding 5 years to his sister's age:
John's age = x + 5 = 10 + 5 = 15 years.
Thus,
John's present age is 15 years, and his sister's present age is 10 years.
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By forming a quadratic equation from the given problem, we determine that John's present age is 15 years and his sister's present age is 10 years.
Let's designate John's age as J and his sister's age as S. We've been given two pieces of information: John is five years older than his sister, and the product of their present ages is 150. Mathematically, these can be expressed as:
J = S + 5J * S = 150Substituting the first equation into the second gives us:
(S + 5) * S = 150
Expanding and rearranging, we get a quadratic equation:
S2 + 5S - 150 = 0
To solve for S, we can either factor the quadratic equation or use the quadratic formula. Factoring seems simpler in this case:
(S + 15)(S - 10) = 0
This gives us two possible values for S: -15 and 10. Since ages cannot be negative, we discard S = -15 and keep S = 10. Now we can find John's age:
J = S + 5 = 10 + 5 = 15
Therefore, John's present age is 15 years, and his sister's present age is 10 years.
An ancient artifact was recently discovered, but due to rust and corrosion, only 75 grams of the original item remained. Based on historical dates, scientists believe that this artifact was decaying at a rate of 2% each year. Although the artifact will now be preserved at a museum, scientists wonder: how much of the original artifact would there be if they had not discovered it for another 10 years?
Write an exponential function rule and solve. Round your answer to the nearest whole number (the ones place). Enter both the number and the associated units
namely, what is the leftover amount when the decay rate is 2% for an original amount of 75 grams after 10 years?
[tex]\bf \qquad \textit{Amount for Exponential Decay} \\\\ A=P(1 - r)^t\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{initial amount}\dotfill &75\\ r=rate\to 2\%\to \frac{2}{100}\dotfill &0.02\\ t=\textit{elapsed time}\dotfill &10\\ \end{cases} \\\\\\ A=75(1-0.02)^{10}\implies A=75(0.98)^{10}\implies A\approx 61.28\implies \stackrel{\textit{rounded up}}{A=61~grams}[/tex]
Answer with explanation:
The exponential decay function is written as :-
[tex]f(x)=A(1-r)^x[/tex], where f (x) is the amount of material left after x years , A is the initial amount of material and r is the rate of decay.
Given : The amount of original item remained now = 75 grams
The rate of decay = 2% = 0.02
Now, the amount of original artifact would there be left if they had not discovered it for another 10 years is given by :-
[tex]f(10)=75(1-0.02)^{10}[/tex]
Solving the above exponential equation , we get
[tex]=61.2804605166\approx61[/tex]
Hence only 61 grams original artifact would there be left if they had not discovered it for another 10 years .
Roy wants to make a path from one corner of his yard to the other as shown below. The path will be 4 feet wide. He wants to find the area of lawn that remains.
Roy claims that the area of the lawn is 300 square feet since it covers exactly one-half of the yard. Which statement about his claim is correct?
He is incorrect. The path will have an area of (4)(40)=160 sq ft. The yard has an area of 600 sq ft. The area of the lawn will be the difference of the yard and path, so it is 440 sq ft.
He is incorrect. The path will have an area of 1/2(4)(40)=80 sq ft. The yard has an area of 300 sq ft. The area of the lawn will be the difference of the yard and path, so it is 220 sq ft.
He is incorrect. The path will have an area of (4)(40)=160 sq ft. The yard has an area of 300 sq ft. The area of the lawn will be the difference of the yard and path, so it is 140 sq ft.
He is incorrect. The path will have an area of (9)(40)=360 sq ft. The yard has an area of 600 sq ft. The area of the lawn will be the difference of the yard and path, so it is 240 sq ft.
Answer:
He is incorrect. The path will have an area of (4)(40) = 160 ft². The yard has an area of 600 ft². The area of the lawn will be the difference of the yard and path, so it is 440 ft².
Step-by-step explanation:
1. Original area of yard
A = lw = 40 × 15 = 600 ft²
2. Area of path
The path is a parallelogram.
A = bh = 4 × 40 =160 ft²
3. Remaining area
Remaining area = original area - area of path = 600 - 160 = 440 ft².
Answer:
A is correct
Step-by-step explanation:
I got 100 on edg
Write in vertex form
Answer:
p(x) = 6(x + 2)² - 3
Step-by-step explanation:
This one requires a lot of thinking because since our A is not 1 and how the quadratic equation looks, we need to think of a low number while "completing the square [½B]²". So, let us choose 2. We set it up like this:
6(x + 2)² → 6(x² + 4x + 4) → 6x² + 24x + 24
6x² + 24x + 24 - 3 → 6x² + 24x + 21 [TA DA!]
We know that our vertex formula is correct. Additionally, -h gives you the OPPOSITE terms of what they really are, and k gives you the EXACT terms of what they really are. Therefore, your vertex is [-2, -3].
I am joyous to assist you anytime.
A factory manufactures widgets based on customer orders. If a customer's order is for less than w widgets, the customer's cost per widget is d dollars. If a customer's order is for at least w widgets, the customer's cost per widget is decreased by c cents for each widget ordered over w widgets. A customer's total cost is t. Which of the following functions would best model the situation given above?
Answer:
Piecewise function model
Step-by-step explanation:
According to the given statement a factory manufactures widgets based on customer orders. If a customer's order is for less than w widgets, the customer's cost per widget is d dollars.
customer order < widgets
If a customer's order is for at least w widgets, the customer's cost per widget is decreased by c cents for each widget ordered over w widgets. A customer's total cost is t.
customer order > widgets
We can notice that we have two different conditions. In this type of question where there are different conditions for different types of domain we use piecewise function.
With different conditions, the cost is different, therefore piecewise function model would be the best option for the situation....
Determine the domain of the function f (x) = 2x - 4 when the range is (0, 12, 20)
Answer:
The domain is (2,8,12)
Step-by-step explanation:
we have
[tex]f(x)=2x-4[/tex]
we know that
The range is (0,12,20)
Find the domain
1) For f(x)=0 -----> Find the value of x
substitute the value of f(x) in the equation and solve for x
[tex]0=2x-4[/tex]
[tex]2x=4[/tex]
[tex]x=2[/tex]
therefore
For f(x)=0 the domain is x=2
2) For f(x)=12 -----> Find the value of x
substitute the value of f(x) in the equation and solve for x
[tex]12=2x-4[/tex]
[tex]2x=12+4[/tex]
[tex]x=8[/tex]
therefore
For f(x)=12 the domain is x=8
3) For f(x)=20 -----> Find the value of x
substitute the value of f(x) in the equation and solve for x
[tex]20=2x-4[/tex]
[tex]2x=20+4[/tex]
[tex]x=12[/tex]
therefore
For f(x)=20 the domain is x=12
therefore
The domain is (2,8,12)
Simplify: |3 – 10| - (12 / 4 + 2)^2
Answer:
-18
Step-by-step explanation:
= |3 – 10| - (12 / 4 + 2)^2
= 7 - (3 + 2)^2
= 7 - (5)^2
= 7 - 25
= -18
Which of the tables represents a function? Table P Input Output 8 3 1 7 5 4 Table Q Input Output 9 3 9 5 4 2 Table R Input Output 7 2 8 6 7 3 Table S Input Output 1 7 1 5 9 2 Table P Table Q Table R Table S
Answer:
Table P represents a function
Step-by-step explanation:
* Lets explain the meaning of the function
- A function is a relation between a set of inputs and a set of outputs
in condition of each input has exactly one output
- Ex:
# The relation {(1 , 2) , (-4 , 5) , (-1 , 5)} is a function because each x in the
order pair has only one value of y
# The relation {(1 , 2) , (1 , 5) , (3 , 7)} is not a function because there is x
in the order pairs has two values of y (x = 1 has y = 2 and y = 5)
* Lets solve the problem
# Table P :
- In put : 8 , 1 , 5
- Out put : 3 , 7 , 4
∵ Each input has only one output
∴ Table P represents a function
# Table Q :
- Input : 9 , 9 , 4
- Out put : 3 , 5 , 2
∵ The input 9 has two outputs 5 and 2
∴ Table Q doesn't represent a function
# Table R :
- In put : 7 , 8 , 7
- Out put : 2 , 6 , 3
∵ The input 7 has two outputs 2 and 3
∴ Table R doesn't represent a function
# Table S :
- In put : 1 , 1 , 9
- Out put : 7 , 5 , 2
∵ The input 1 has two outputs 7 and 5
∴ Table S doesn't represent a function
* Table P represents a function
Answer:
The answer is A I just took the test
Let f(x)=2^x and g(x)=x-2. The graph of (f o g)(c) is shown below. What is the domain of (f o g)(x)?
The domain of the outer function is all real numbers, because f(x) is an exponential function.
The domain and range of g(x) are all real numbers.
So, the domain of the composition is again all real numbers, because there is no way that an output from g(x) will not be a valid input for f(x).
For this case we have the following functions:
[tex]f (x) = 2 ^ x\\g (x) = x-2[/tex]
We must find [tex](f_ {o} g) (x):[/tex]
By definition we have to:
[tex](f_ {o} g) (x) = f [g (x)][/tex]
So:
[tex](f_ {o} g) (x) = 2 ^ {x-2}[/tex]
By definition, the domain of a function is given by all the values for which the function is defined. Thus, the domain of the composite function is:
In this case, there are no real numbers that make the expression indefinite.
Thus, the domain is given by all the real numbers.
Answer:
All the real numbers
Which of the following fractions is an improper fraction?
*2/3
*6/11
*21/25
*8/7
Answer:
8/7
Step-by-step explanation:
8/7 is an improper fraction.
8 > 7
A fraction has to have the numerator less than the denominator, in order to be a proper fraction.
In this case, 8/7 is the only fraction with a numerator more than the denominator.
Therefore, 8/7 is an improper fraction.
Answer:
8/7 is an improper fraction.
Step-by-step explanation:
An improper fraction is just a fraction where the numerator (top number) is greater than the denominator (bottom number)
2<3
6<11
21<25
8>7
Hope this helps!!!
What is the volume of the composite figure?
A. 140 cubic inches
B. 147 cubic inches
C. 168 cubic inches
D. 196 cubic inches
Answer:
A. 140 cubic inches
Step-by-step explanation:
The total volume is the volume of the rectangular prism at the bottom plus the volume of the pyramid on top.
The volume of the prism is width times length times height.
V = wlh
V = (3)(7)(4)
V = 84
The volume of the pyramid is one third the area of the base times the height.
V = ⅓ Ah
The base of the pyramid is a rectangle. Its area is the width times length. The height of the pyramid is the total height minus the height of the prism.
V = ⅓ (3)(7)(12−4)
V = 56
So the total volume is:
V = 84 + 56
V = 140
Answer:
140 cubic inches
Step-by-step explanation:
Write a polynomial function of least degree with integral coefficients that has the given zeros. –2, –3,3 – 6i
Answer:
f(x) = (x+2)(x+3)(x-(3-6i))(x-(3+6i))
f(x) = 270 + 189 x + 21 x^2 - x^3 + x^4
Step-by-step explanation:
First of all, we must know that complex roots come in conjugate pairs.
So the zeros of your equation would be
x = -2
x = -3
x = 3 - 6i
x = 3 + 6i
Your polynomial is of fourth degree.
f(x) = (x-(-2))(x-(-3))(x-(3-6i))(x-(3+6i))
f(x) = (x+2)(x+3)(x-(3-6i))(x-(3+6i))
Please , see attached image below for full expression
f(x) = 270 + 189 x + 21 x^2 - x^3 + x^4
Answer:
The required polynomial is [tex]P(x)=a\left(x^4-x^3+21x^2+189x+270\right)[/tex].
Step-by-step explanation:
The general form of a polynomial is
[tex]P(x)=a(x-c_1)^{m_1}(x-c_2)^{m_2}...(x-c_n)^{m_n}[/tex]
where, a is a constant, [tex]c_1,c_2,..c_n[/tex] are zeroes with multiplicity [tex]m_1,m_2,..m_n[/tex] respectively.
It is given that –2, –3,3 – 6i are three zeroes of a polynomial.
According to complex conjugate root theorem, if a+ib is a zero of a polynomial, then a-ib is also the zero of that polynomial.
3 – 6i is a zero. By using complex conjugate root theorem 3+6i is also a zero.
The required polynomial is
[tex]P(x)=a(x-(-2))(x-(-3))(x-(3-6i))(x-(3+6i))[/tex]
[tex]P(x)=a(x+2)(x+3)(x-3+6i)(x-3-6i)[/tex]
[tex]P(x)=a\left(x^2+5x+6\right)\left(x-3+6i\right)\left(x-3-6i\right)[/tex]
On further simplification, we get
[tex]P(x)=a\left(x^3+6ix^2+2x^2+30ix-9x+36i-18\right)\left(x-3-6i\right)[/tex]
[tex]P(x)=a\left(x^4-x^3+21x^2+189x+270\right)[/tex]
Therefore the required polynomial is [tex]P(x)=a\left(x^4-x^3+21x^2+189x+270\right)[/tex].
Which represents the solution set of the inequality 5x-9321?
Answer:
The solution set is the interval (-∞ , 6] OR {x : x ≤ 6}
Step-by-step explanation:
* Lets explain how to find the solution set of the inequality
- The inequality is 5x - 9 ≤ 21
∵ 5x - 9 ≤ 21
- At first add 9 to both sides of the inequality to separate x in one
side and the numbers in the other sides
∴ 5x - 9 + 9 ≤ 21 + 9
∴ 5x ≤ 30
- Lets divide both sides of the inequality by 5 to find the values of x
∴ (5x ÷ 5) ≤ (30 ÷ 5)
∴ x ≤ 6
- The solutions of the inequality is all real numbers smaller than
or equal to 6
∴ The solution set is the interval (-∞ , 6] OR {x : x ≤ 6}
- We can represent this inequality graphically to more understand
for the solution
- From the graph the solution set is the purple area
Write the equation of the line that passes
through the point (3, -3) and has a slope of -2.
Step-by-step explanation:
The point-slope form of an equation of a line:
[tex]y-y_1=m(x-x_1)[/tex]
m - slope
(x₁, y₁) - point on a line
We have the point (3, -3) and the slope m = -2. Substitute:
[tex]y-(-3)=-2(x-3)[/tex]
[tex]y+3=-2(x-3)[/tex] - point-slope form
Convert to the slope-intercept form (y = mx + b):
[tex]y+3=-2(x-3)[/tex] use the distributtive property
[tex]y+3=-2x+(-2)(-3)[/tex]
[tex]y+3=-2x+6[/tex] subtract 3 from both sides
[tex]y=-2x+3[/tex] - slope-intercept form
Convert to the standard form (Ax + By = C):
[tex]y=-2x+3[/tex] add 2x to both sides
[tex]2x+y=3[/tex] - standard form
Convert to the general form (Ax + By + C = 0):
[tex]2x+y=3[/tex] subtract 3 from both sides
[tex]2x+y-3=0[/tex] - general form
What is the product of eight factors of 10^4
Answer:
2ε + 12 [two trillion (twelve zeros)]
Step-by-step explanation:
[1][2][4][5][10][1000][2000][2500] (1 is unnecessary)
If you are talking about the FIRST 8 factors of 10000 [10⁴], then here you are. Multiply all those numbers to get the calculator notation answer above, or two trillion.
**This question is not specific enough, which was why I improvised and thought that this was what you meant. I apologize if this was not what you meant and I also hope this was what you were looking for.
I am joyous to assist you anytime.
Answer:
[tex]10^{32}[/tex].
Step-by-step explanation:
eight factors of 10^4 are
[tex]10^4*10^4*10^4*10^4*10^4*10^4*10^4*10^4 = (10^4)^8 = 10^{4*8}=10^{32}[/tex]
that is one hundred nonillion.
Find the midpoint of the line segment with the given endpoints
(10,2) and (8,4)
Answer:
The midpoint of the line segment is (9,3).
Step-by-step explanation:
To find the midpoint of a line segment, we use the midpoint formula, ( (x1 + x2)/2, (y1+y2)/2). This means that to find the midpoint, we must add together both of the x-values of the endpoints and divide by 2 and do the same with the y values, basically finding the average of the two endpoints, or the middle.
x1 + x2 = 10 + 8 = 18
18/2 = 9
y1 + y2 = 2 + 4 = 6
6/2 = 3
Therefore, the midpoint of the line segment is (9,3).
Hope this helps!
This graph represents the function f(x) = x^2 - 4x + 3/ x^2 + ax + b. a= ___ b= ___
Answer:
f(x) = (x+2)(x-8)/(x-6)(x+4) <-> x=6,x=-4
i(x) = (x-4)(x-6)/(x-2)(x+8) <-> x=2,x=-8
k(x) = (x-2)(x+8)/(x+6)(x-4) <-> x=-6,x=4
m(x) = (x+4)(x-6)/(x+2)(x-8) <-> x=-2,x=8
Step-by-step explanation:
The function is discontinuous if the denominator is zero.
We will check for which function the values are given
1) f(x) = (x+2)(x-8)/(x-6)(x+4)
if x = 6 and x = -4 the denominator is zero
So, x=6 and x=-4 given
2) g(x) = (x+4)(x-8)/(x+2)(x-6)
if x = -2 and x = 6 the denominator is zero
So, x= -2 and x= 6 not given so, g(x) will not be considered
3) h(x)= (x+2)(x-6)/(x-8)(x+4)
if x = 8 and x = -4 the denominator is zero
So, x= 8 and x= -4 not given so, h(x) will not be considered
4) i(x) = (x-4)(x-6)/(x-2)(x+8)
if x = 2 and x = -8 the denominator is zero
So, x= 2 and x= -8 given
5) j(x) = (x-2)(x+6)/(x-4)(x+8)
if x = 4 and x = -8 the denominator is zero
So, x= 4 and x= -8 not given so, j(x) will not be considered
6) k(x) = (x-2)(x+8)/(x+6)(x-4)
if x = -6 and x = 4 the denominator is zero
So, x= -6 and x= 4 given
7) l(x) = (x-4)(x+8)/(x+6)(x-2)
if x = -6 and x = 2 the denominator is zero
So, x= -6 and x= 2 not given so, l(x) will not be considered
8) m(x) = (x+4)(x-6)/(x+2)(x-8)
if x = -2 and x = 8 the denominator is zero
So, x= -2 and x= 8 given
The figure is a regular hexagon with side length 26 ft.
What is the length of y?
Answer: the length is 13
Step-by-step explanation:
one side is 26 ft. and y is half of one side so by dividing 26 by 2 you would get 13
If 5+ 20 -22-3х - 10.2-2x+5, what is the value of х?
Answer:
3Step-by-step explanation:
[tex]5+20\cdot2^{2-3x}=10\cdot2^{-2x}+5\qquad\text{subtract 5 from both sides}\\\\20\cdot2^{2-3x}=10\cdot2^{-2x}\qquad\text{divide both sides by 10}\\\\2\cdot2^{2-3x}=2^{-2x}\qquad\text{use}\ a^n\cdot a^m=a^{n+m}\\\\2^{1+2-3x}=2^{-2x}\\\\2^{3-3x}=2^{-2x}\iff3-3x=-2x\qquad\text{subteact 3 from both sides}\\\\-3x=-2x-3\qquad\tex\qquad\text{add}\ 2x\ \text{to both sides}\\\\-x=-3\qquad\text{change the signs}\\\\x=3[/tex]
Write the product in its simplest form
-3y.3y4
Enter the correct answer.
Answer:
[tex]\large\boxed{-9y^5}[/tex]
Step-by-step explanation:
[tex]-3y\cdot3y^4=(-3\cdot3)(y\cdot y^4)\qquad\text{use}\ a^n\cdot a^m=a^{n+m}\\\\=-9y^{1+4}=-9y^5[/tex]
Suppose that the time it takes to do a job is inversely proportional to the number of workers. That is, the more workers on the job the less time required to complete the job. If it takes 3 workers 16 days to finish a job, how long will it take 8 workers
Answer: 6 days.
Step-by-step explanation:
Inverse proportion equation has the form:
[tex]y=\frac{k}{x}[/tex]
Where "k" is the constant of proportionality.
Let be "y" the time it takes to do a job (number of days) and "x" the number of workers.
We can find "k" knowing that it takes 3 workers 16 days to finish a job:
[tex]16=\frac{k}{3}\\\\k=16*3\\\\k=48[/tex]
To find how long will it take 8 workers to finish the job, you must substitute the value of "k" and [tex]x=8[/tex] into [tex]y=\frac{k}{x}[/tex]. Then you get:
[tex]y=\frac{48}{8}\\\\y=6[/tex]
Select the correct answer from each drop-down menu.
Ashley has 500 songs in his music player. Every week he adds 10 songs to his collection. How many songs will he have in his music player after
20 weeks?
The output of the function (f(n)=500+10n) or (f(n)=10+20n).the output of the function is (700/600)
when the input is 20
Answer:
700
Step-by-step explanation:
he originally has 500 songs which is the constant. He adds 10 songs a week which is the slope. and 20 will be the number of weeks. You can make the equation y=10x+500 and replace the x with 20. 20 times 10 is 200 and 200 plus 500 is 700 which is your answer
Which functions have an additive rate of change of 3? Select TWO options
Answer:
Second table.
Step-by-step explanation:
A function has an additive rate of change if there is a constant difference between any two consecutive input and output values.
The additive rate of change is determined using the slope formula,
[tex]m = \frac{y_2-y_1}{x_2-x_1} [/tex]
From the first table we can observe a constant difference of -6 among the y-values and a constant difference of 2 among the x-values.
[tex]m = \frac{ - 9- - 3}{4-2} = - 3[/tex]
For the second table there is a constant difference of 3 among the y-values and a constant difference of 1 among the x-values.
The additive rate of change of this table is
[tex]m = \frac{ - 1 - - 4}{3 - 1} = 3[/tex]
Therefore the second table has an additive rate of change of 3.
Answer: it’s A and E
First and last one
Step-by-step explanation:
Simplify [4a^(-6) b^2]^(-3) write your answer using only positive exponent
For this case we must simplify the following expression:
[tex](4a^{ - 6} * b ^ 2)^{ - 3}[/tex]
By definition of power properties we have:[tex]a ^ {-1} = \frac {1} {a ^ 1} = \frac {1} {a}[/tex]
Then, rewriting the expression:
[tex](\frac {4} {a ^ 6} * b ^ 2) ^ {- 3} =\\\frac {1} {(\frac {4} {a ^ 6} * b ^ 2)^3} =\\\frac {1} {(\frac {4b ^ 2} {a ^ 6})^3} =[/tex]
By definition we have to:
[tex](a ^ n) ^ m = a ^ {n * m}[/tex]
[tex]\frac {1} {\frac {64b ^ 6} {a^{18}}}\\\frac {a^{18}} {64b ^ 6}[/tex]
Answer:
[tex]\frac {a^{18}} {64b ^ 6}[/tex]
1,2,and 3 please I really need help
Answer:
1) yes
2) Option B
3) 9200
Step-by-step explanation:
1) yes
The exponential function is: y=-(x)^3
Putting the values of x in the given function we get the values of y.
x =1 , y= -(1)^3, y=-1
x= 2, y= -(2)^3, y = -8
x= 3, y= -(3)^3,y = -27
x= 4, y= -(4)^3,y = -64
2) f(x) = 160.2^x
if value of x = 2
then f(2) = 160.2^(2)
f(2) = 160.4
f(2) = 640
So, Option B is correct.
3) f(x) = 2300.2^x
if value of x = 2 decades then
f(2) = 2300.2^2
f(2) = 2300.4
f(2) = 9200
Since all options are not visible, so correct answer is 9200
PLEASE HELP! Select all the correct answers.
Terry is an up-and-coming florist who specializes in weddings. He uses 5 roses, 3 daisies, and 4 bundles of green filler to make one bouquet. If r is the cost of a rose, d is the cost of a daisy, and f is the cost of a bundle of green filler, which expression represents the cost for making 75 bouquets?
Answer:
im sorry this never got answered but you would put the third one i believe
Step-by-step explanation: