Answers
Answer:
2. C
3. BCEF
4. C
Step-by-step explanation:
2. In a function, the x value cannot have two y values (for example: if the points are (1,2) and (1,3) then that is not a function).
In this question, none of the x values repeat with multiple y values, so it is a function. the answer is C.
It is not D, because not all straight lines are functions. If the straight line is vertical, then there is only one x value and it has infinitely many values for y. So, not all straight lines are necessarily functions.
3. Range is the y values. The points are (3,4), (-2,3), (7,1), (2, 1/2)
Here, the y values are 4, 3, 1, and 1/2
Choices B,C,E,F are the answers.
4. If the domain is x[tex]\geq[/tex]0, then 0 is the lowest we can plug into x.
y=2(0)+6
y=6
So, the answer is C. y[tex]\geq[/tex]6
You were on the right track :)
Related Questions
Please help ASAP I've been stuck on this question
Answers
The coordinate of the vertices of △A'B'C' are A'(3,6), B'(9,-3), and C'(-12, 6). Since the scale factor is 3.
What is coordinate of a point?
The coordinates are a pair of numbers that, using the horizontal and vertical lines, precisely pinpoint a point's location on a cartesian plane. typically represented by (x, y), the point's x and y values on a graph.
The coordinate of △ABC are A(1,2), B(3,-1) and C(-4,2).
The scale factor is k = 3.
The x-coordinate of A is 1.
The y-coordinate of A is 2.
The x-coordinate of B is 3.
The y-coordinate of B is -1.
The x-coordinate of C is -4.
The y-coordinate of C is 2.
To find the vertices of △A'B'C', multiplying x-coordinate and y-coordinate by 3.
The x-coordinate of A' is 1 × 3 = 3.
The y-coordinate of A' is 2 × 3 = 6.
The x-coordinate of B' is 3 × 3= 9.
The y-coordinate of B' is -1 × 3 = -3.
The x-coordinate of C' is -4 × 3 = -12.
The y-coordinate of C' is 2 × 3 = 6.
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Another brand of sheets is on sale 30% off with a regular price of $18.00 per sheet. Which is a better deal, the previous example or this one? Explain. (2 points)
30% OFF EACH SHEET!
Answers
The cost for the sheet is $22.60 and a discount of 30% is given.
How to calculate the value of the sheets?It is important to note that a percentage is a value or ratio that may be stated as a fraction of 100. If we need to calculate a percentage of a number, we should divide it's entirety and then multiply it by 100.
From the information, the brand of sheets is on sale 30% off with a regular price of $18.00 per sheet.
Therefore, the cost for the sheet will be:
= $18 - (30% × $18)
= $18 - $5.40
= $12.60
The cost for the brand of sheet is $22.60.
Note that the information was incomplete and the calculation was based on the information given.
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Given the following functions, find and simplify (f⋅g)(3). f(x)=−3x−2 g(x)=−x+2 Do not include "(f⋅g)(3)=" in your answer.
Answers
The value of the function (f⋅g)(3) = 1
What are Functions:The characteristic that every input is associated with exactly one output defines a function as a relationship between a set of inputs and a set of allowable outputs. It is denoted by the letter f or f(x).
Here we have
f(x) = − 3x − 2
g(x) = − x + 2
=> (f · g) = f(g(x))
Now Take x = − x + 2 in f(x)
=> f(g(x)) = − 3(− x + 2)x − 2
= 3x − 6 − 2
= 3x − 8
From the above calculations,
(f⋅g)(x) = 3x − 8
Now we need to calculate the value of (f⋅g)(3) as given below
=> (f⋅g)(3) = 3(3) − 8 = 9 − 8 = 1
Therefore,
The value of the function (f⋅g)(3) = 1
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Find a formula for the exponential function passing through the points(-1,4/5) and (1 , 20)
y=
Answers
The exponential function that contains the points (x₁, y₁) = (- 1, 4 / 5) and (x₂, y₂) = (1, 20) is y = 4.002 · [tex]e^{1.609\cdot x}[/tex].
How to derive the exponential function containing two given points
In this problem we must determine the exponential function that contains the points (x₁, y₁) = (- 1, 4 / 5) and (x₂, y₂) = (1, 20), whose formula is described below:
y = A · [tex]e^{B\cdot x}[/tex]
Where:
x - Independent variable.y - Dependent variable. A, B - Constants.If we know that (x₁, y₁) = (- 1, 4 / 5) and (x₂, y₂) = (1, 20), then the values of constants are:
4 / 5 = A · [tex]e^{-B}[/tex]
20 = A · [tex]e^{B}[/tex]
If we divide the latter expression by the former, then:
25 = [tex]e^{2\cdot B}[/tex]
㏑ 25 = 2 · B
B = (1 / 2) · ㏑ 25
B ≈ 1.609
And the value of A is:
A = 20 / [tex]e^{1.609}[/tex]
A ≈ 4.002
The exponential function is y = 4.002 · [tex]e^{1.609\cdot x}[/tex].
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Nicholas is typing a book report at an average speed of 40 words per minute. Which equation could Nicholas use to find t, the amount of time in minutes he will spend typing, if his report has [w] words?
A. t = 40w
B. w = 40t
C. t = w + 40
D. w = t + 40
Answers
t — time, he is finding time
40w — 40 words per minute
Suppose you want to have $800,000 for retirement in 25 years. Your account earns 4% interest.
a) How much would you need to deposit in the account each month?
b) How much interest will you earn?
Answers
$1,556.72 is required to deposit in the account each month.
72% of interest is earned.
a)
It is a classic Ordinary Annuity saving plan. The general formula is
FV = P((1+r)^n-1)/r)--------(1)
where
FV is the future value of the account.
P is the monthly payment (deposit).
r is the monthly percentage yield presented as a decimal.
n is the number of deposits (= the number of years multiplied by 12, in this case).
From this formula, you get the monthly payment:
P=FV(r/(1+r)^-1)----------(2)
Under the given conditions,
FV = $800,000
r = 0.04/12
n = 25*12.
So, according to formula (2), the monthly payment is
P=800000(0.04/12(1+0.04/12)^25*12-1)
P=800000(0.003/1.713)
P=$1.556.72
Note that of the projected $800,000 the total you deposit will be only 25*12 times $1.556.72 i.e. about 25*12*1.556.72 = 467016 dollars.
The rest is what the account will earn/accumulate over the 25 years.
b)
You will earn:
(8000000-467016/467016)*100
72% of interest is earned.
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Write this number in scientific notation.
.0000149
Answers
Answer: 1.49 x [tex]10^{-5}[/tex]
Step-by-step explanation:
How much money has to invested at 4.3% interest compounded continuously to have $19,000 after 16 years?
A. $ 9549.02
B. $ 9584.15
C. $ 9618.91
D. $ 9560.77
Answers
By using the concept of compounded interest, it can be calculated that
$9549.02 has to be invested at 4.3% interest compounded continuously to have $19,000 after 16 years
First option is correct
What is compound interest?
If the interest on a certain principal at a certain rate over a certain period of time increases exponentially rather than linearly, the interest earned is called compound interest.
Let the principal be $p
Rate= 4.3 %
Time = 16 years
[tex]19000 = pe^{\frac{4.3}{100} \times 16}\\19000 = pe^{0.688}\\19000 = p \times 1.989732\\p = \frac{19000}{1.989732}\\[/tex]
p = $9549.02
First option is correct
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You have $108,000 to invest in a portfolio containing Stock X and Stock Y. Your goal is to create a portfolio that has an expected return of 14.0 percent. Stock X has an expected return of 12.6 percent and a beta of 1.15, and Stock Y has an expected return of 9.8 percent and a beta of .86.
Answers
The amount invested in Sock Y is - $126,000 and the Beta of the portfolio is 1.636.
What is an expression?The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.
Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.
Data provided in the question:
Total amount to be invested = $140000
Stock X Y
Expected return 14% 10%
Beta 1.42 1.18
Expected return of portfolio = 17.6%
Now,
let the weight invested n stock X be W
therefore,
Weight of Stock Y = 1 - W
thus,
( W × 14% ) + (1 - w) × 10% = 17.6 %
14W + 10% - 10W = 17.6%
4W = 7.6
W = 1.9
Therefore,
weight of Y = 1 - 1.9 = -0.9
Amount investment in Sock Y = Total amount to be invested × Weight
= 140,000 × ( - 0.9 )
= - $126,000 i.e short Y
Beta of portfolio = ∑ (Beta × Weight)
Beta of portfolio= [ 1.42 × 1.9 ] + [ 1.18 × (-0.9) ]
Beta of portfolio= 2.698 - 1.062
Beta of portfolio= 1.636
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16x¹9y8
8x11 ⁹ what is the solution
Answers
16x^1 x 9y x 8
Multiply it..
1152xy
Answer is 1152xy
Write an inequality to represent the situation.
six times a number and three is at least forty-two
six times a number and three is at most forty-two
six times a number and three is less than forty-two
six times a number and three is more than forty-two
6(n + 3) ≤ 42
6(n + 3) ≥ 42
6(n+3) > 42
6(n + 3) < 42
Answers
The inequality that represent each situations are:
a. 6(n + 3) ≥ 42.
b. 6(n + 3) ≤ 42
c. 6(n + 3) < 42
d. 6(n+3) > 42.
How to Write an Inequality for a Situation?To write the inequality for each of the situations, translate each statement into algebraic expressions and use the appropriate inequality sign where necessary.
Thus, let the unknown number be represented as n.
a. The statement, "at least 42" means not less 42, which is the same as "greater than or equal to 42".
Therefore, the first statement is represented by the inequality, 6(n + 3) ≥ 42.
b. "6 times n and 3 is at most 42" is written as, 6(n + 3) ≤ 42
c. "6 times n and 3 is less than 42" would be translated as: 6(n + 3) < 42
d. "6 times n and 3 is more than 42" would be, 6(n+3) > 42.
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Step-by-step explanation:
6(n+3)>42
this is your answer
arlynn
A group of 8 students was asked, "How many hours did you watch television last week?" Here are their responses.
7,5, 4, 5, 9, 8, 11, 7
Find the median and mean number of hours for these students.
If necessary, round your answers to the nearest tenth.
Answers
Median = 7
Explanation: To find both The median and the mean, you must order the numbers from least to greatest. To find the median, you need to find the number in the middle of the list of numbers. In this case, both of the middle numbers are 7 so the median is 7. To find the mean, you need to add all of the numbers together and then divide by how many numbers that are listed. In this case, the sum of the listed numbers is 56. 56 divided by 8 equal 7 which means the mean is 7.
At a baseball game, a vender sold a combined total of 246 sodas and hot dogs. The number of hot dogs sold was 34 less than the number of sodas sold. Find the number of sodas sold and the number of hot dogs sold.
Answers
Answer:
The vendor sold 212 sodas and 34 hot dogs.
Step-by-step explanation:
Subtract 34 from 246 for the number of sodas sold.
Solve 5(2m + 1) − 3m = −16.
m equals negative 16 over 30
m equals negative 21 over 30
m = −3
m = −0.33
Answers
Answer:
m= -3
Step-by-step explanation:
5(2m+1)-3m=-16
5(2m)+5(1)-3m= -16
10m+5-3m= -16
7m+5= -16
-5. -5
7m= -21
/7. /7
m= -3
Hopes this helps please mark brainliest
And :-3
process:
5(2m + 1) - 3m = - 16
10m+5-3m=-16
7m=-16-5
m=-21/7
m=-3
The graph of the relationships ( dogs,cost) is a line that contains the points(0,0) (3,12) and (6,24). What is the constant of proportionality?
Answers
4 is the constant of proportionality of given graph.
What is Graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points.
Given,
The graph of the relationships ( dogs,cost) is a line that contains the points(0,0) (3,12) and (6,24).
We need to find the constant of proportionality
The constant of proportionality is the ratio that relates two given values in what is known as a proportional relationship.
To find the constant of proportionality, we have to divide the value of y by x.
12/3=4
24/6=4
Hence, 4 is the constant of proportionality of given graph.
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An individual is teaching a class on Excel macros. The individual plans to break the class up into groups of 3 and wants each group to have a different exercise to practice on. Solve for the dependent variable (y) if the independent variable is 15.
Answers
The dependent variable, y from the given situation is 15
Solve for the dependent variableThe number of groups = 3Number of exercises each group practice on = 3The total number of exercises the individual needs, y = 3x/3
Where,
y = independent variable x = dependent variable = 15So,
y = 3x/3
substitute the value of x into the equation
y = 3(15) / 3
open parenthesis
y = 45 /3
y = 15
In conclusion, the value of the dependent variable is 15
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Mugs can be packed with up to 6 mugs in each box how many boxes are needed to pack 1528
Answers
X box = 1528 mugs
Cross multiplying, we get:
(1)(1528) = (6)(x)
1528/6 = x
254 = x
So, 254 boxes needed to pack 1528 mugs
Write a function describing the relationship of the given variables.
A, varies directly with, r, and when r = 4, A = 8
A=______
Answers
The relation between a and r is 2r
How to write a function describing the relationship of the given variables?According to the given information
a varies directly with r
a = 8
r = 4
a is directly proportional to r
a ∝ r
a = k r
where k is constant of proportionality
k = [tex]\frac{a}{r}[/tex]
k = [tex]\frac{8}{4}[/tex]
k = 2
so,
a = k r
putting the value of k in the above equation
we get
a = 2r
The relation between a and r is 2r
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Solve 3x + 2 = 5. hurry pls
Answers
Answer: 1
Let's solve your equation step-by-step.
3x+2=5
Step 1: Subtract 2 from both sides.
3x+2−2=5−2
3x=3
Step 2: Divide both sides by 3.
3x/3 = 3/3
(3x divided by 3 cancels the 3 in 3x making it just x)
x=1
HELP PLEASEEE
A party rental company has chairs and tables to rent. There were two customers who rented both chairs and tables last week. The table below shows the number of chairs, the number of tables, and the total cost (in dollars) for those two customers.
Answers
By setting up the equation, we get the system of linear equations are
9x + 7y = 77
3x + 5y = 49
solving these equation Cost to rent a chair = $1.75
cost to rent a table = $8.75
What is system of linear equation?A system of linear equations is a collection of one or more linear equations involving the same variables.
What are the method to solve system of linear equations?There are several methods for solving systems of linear equations, including:
Graphing: One way to solve a system of linear equations is to graph each equation on the same set of axes and look for the point of intersection. This method is useful when you want to visualize the solution, but it can be time-consuming if you have a large system of equations.
Substitution: The substitution method involves solving one of the equations for one of the variables and substituting this expression into the other equation. This will result in an equation with only one variable, which you can then solve.
Elimination: The elimination method involves adding or subtracting the equations in such a way that one of the variables is eliminated. This will result in an equation with only one variable, which you can then solve.
etc.
To solve the system of equations 9x + 7y = 77 and 3x + 5y = 49, you can use the substitution method.
First, solve the first equation for y:
9x + 7y = 77
7y = -9x + 77
y = (-9/7)x + 11
Now substitute this expression for y into the second equation:
3x + 5((-9/7)x + 5(11) = 49
3x - (45/7)x + 55 = 49
solving for x :
x = 1.75
Now substitute this value for x back into the first equation to find y:
y = 8.75
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Select from the drop-down menu to correctly complete the statement. The product of 7 and 5/8 is Choose... because 5/8 is less than 1.
Answers
The complete statement will be;
⇒ The product of 7 and 5/8 is 35 / 8 because 5/8 is less than 1.
What is Multiplication?
To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.
Given that;
The statement is;
''The product of 7 and 5/8 is Choose... because 5/8 is less than 1.''
Now,
Since, The statement is;
''The product of 7 and 5/8 is Choose... because 5/8 is less than 1.''
Hence, We get;
⇒ 7 × 5/8 = 35 / 8
Thus, The complete statement will be;
⇒ The product of 7 and 5/8 is 35 / 8 because 5/8 is less than 1.
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send help i need help please whta is the answer
Answers
How would you express the area of he rectangle using the Distributive Property?
area = length * width
area using Distributive Property: 3 (x + 5)
The function f(x) = -x + 2 can be formed by
shifting the function y = -2/3x in which way?
A. vertical shift up 2
B. reflection over the x-axis
C. vertical shift down 2
D. horizontal shift to the left 2
Please Show the Work & thank u
Answers
Answer:
A) vertical shift up 2------------------------------
The difference of the functions is:
f(x) - y = - 2/3x + 2 - (- 2/3x) = 2The difference between functions is positive, therefore it is a vertical shift up by 2 units.
For what value of x would 3 (3x − 1)− 3 (5x − 3)= − (x + 6)?]
Answers
Answer:
x = 12/5
Step-by-step explanation:
3 (3x − 1) − 3 (5x − 3) = − (x + 6)
9x − 3 − 15x + 9 = − x − 6
9x − 15x + x = 3 − 9 − 6
− 5x = − 12
5x = 12
x = 12/5
Answer:
[tex]x=\dfrac{12}{5}[/tex]
Step-by-step explanation:
Given equation:
[tex]3(3x-1)-3(5x-3)=-(x+6)[/tex]
Distribute:
[tex]\implies 3 \cdot 3x + 3 \cdot (-1) - 3 \cdot 5x - 3 \cdot (-3)=-x-6[/tex]
[tex]\implies 9x-3-15x+9=-x-6[/tex]
Collect and combine like terms on the left side of the equation:
[tex]\implies 9x-15x+9-3=-x-6[/tex]
[tex]\implies -6x+6=-x-6[/tex]
Add 6x to both sides:
[tex]\implies -6x+6+6x=-x-6+6x[/tex]
[tex]\implies 6=5x-6[/tex]
Add 6 to both sides:
[tex]\implies 6+6=5x-6+6[/tex]
[tex]\implies 12=5x[/tex]
[tex]\implies 5x=12[/tex]
Divide both sides by 5:
[tex]\implies \dfrac{5x}{5}=\dfrac{12}{5}[/tex]
[tex]\implies x=\dfrac{12}{5}[/tex]
5 and square root of 4
Answers
Answer:
7-------------------
It is assumed you need to add 5 and square root of 4:
[tex]5+\sqrt{4} =5+\sqrt{2^2} =5+2=7[/tex]How many reflection symmetries does a twelve-pointed star have? How many rotational symmetries does a twelve-pointed star have?
Answers
Answer: 12 symmetries
Step-by-step explanation:
just draw the lines on the star.
Find the value of x. Leave your answer in simplest radical form.
Answers
The value of x in simplest radical form is x = [tex]\sqrt{17}[/tex]
Explain Pythagoras theorem.
The Pythagorean Theorem (also known as the Pythagorean Theorem) is an important topic in mathematics that describes the relationship between the sides of a right triangle. The sides of a right triangle are also called Pythagorean numbers.
The Pythagorean theorem is basically used to find unknown side lengths and triangle angles. Using this theorem, we can derive the formulas for the base, perpendicular and hypotenuse.
Using Pythagoras theorem in both the triangles,
Find the hypotenuse in above triangle
[tex]h^2=P^2+B^2[/tex]
[tex]h^2=4+4=8[/tex]
h = [tex]2\sqrt{2}[/tex]
Now, using Pythagoras theorem in below triangle,
[tex]h^2=P^2+B^2[/tex]
[tex]5^2 = x^{2} + 8[/tex]
25 = [tex]x^{2}[/tex] + 8
[tex]x^{2}[/tex] = 25 - 8 = 17
x = [tex]\sqrt{17}[/tex]
Therefore, x = [tex]\sqrt{17}[/tex]
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Choose the best answer. For a biology project, you measure the weight in grams (g) and the tail length in millimeters (mm) of a group of mice. The equation of the least-squares line for predicting tail length from weight is predicted tail length = 20 + 3
\times
×
weight. Which of the following is not correct? (a) The slope is 3, which indicates that a mouse's weight should increase by about 3 grams for each additional millimeter of tail length. (b) The predicted tail length of a mouse that weighs 38 grams is 134 millimeters. (c) By looking at the equation of the least-squares line, you can see that the correlation between weight and tail length is positive. (d) If you had measured the tail length in centimeters instead of millimeters, the slope of the regression line would have been 3/10 = 0.3. (e) One mouse weighed 29 grams and had a tail length of 100 millimeters. The residual for this mouse is -7.
Answers
The part (a) is not correct i.e. The slope is 3, which indicates that a mouse's weight should increase by about 3 grams for each additional millimeter of tail length.
What is Regression analysis ?
Regression analysis is the process of determining how one or more variables and the outcome variable relate to one another. Risk factors, co-founders, and the outcome variable are all referred to as predictors or independent variables. The result variable is sometimes referred to as the dependent or response variable. Regression analysis displays the dependent variable as "y" and the independent variables as "x".
Given, tail length = (3 × weight) + 20
(a) Here, The slope is 3 which indicates that a mouse's length is the sum of 3 times the weight and 20. So, the statement is not correct.
(b) If weight is 38 gm, then
tail length = 38 × 3 + 20
= 114 + 20 = 134mm.
So, the statement is correct.
(c) We've tail length = (3 × weight) + 20
we can see that the relationship between the two is positive because when the weight is increased, the tail length also increases.
So, the given statement is correct.
(d) The slope is 3 when the tail length is being measured in millimeters.
Now, If we measure it in centimeter = 3/10 = 0.3 cm
∵ 1 mm = 1/10 cm.
So, the given statement is correct.
(e) when a mouse has weight of 29 grams and tail length of 100 mm.
When the weight is 29 grams, it should have tail length as :
tail length = 29 × 3 + 20
= 107 mm.
but, tail length is given as 100 mm.
So, the residual for the mouse is -7 i.e. (100 - 107)
Hence, The given statement is correct.
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Aspen incorrectly converted 15/8 to a decimal using long division. Check her work carefully to find the error. Select the digit where she first made a mistake.
Answers
The mistake happens when computing 70-64. The result is not 4, but should be 6 instead.
The correct long division is shown below.
This means [tex]\frac{15}{8} = 1.875[/tex] in which you can use your calculator to verify this.
To test m for an x distribution that is mound-shaped using
sample size n 30, how do you decide whether to use the normal or the
Student’s t distribution?
Answers
To decide whether to use the normal or the Student’s t distribution, for an x distribution that is mound-shaped:
Use the normal distribution if the standard deviation is known. Use the Student's t - distribution when the standard deviation is not known.
What is normal distribution?A probability distribution that is symmetric about the mean is the normal distribution, sometimes referred to as the Gaussian distribution.
It demonstrates that data that are close to the mean occur more frequently than data that are far from the mean. The normal distribution is depicted graphically as a bell curve.
What is t distribution?For small sample numbers or unidentified variances, population parameters are estimated using a form of probability function called a t-distribution.
Hence t-distribution is suitable when the variance which is standard deviation squared is unknown
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