Chen was wrong with the explanation the voter of a quadratic equation is at v(h, k) where
h = b/2ak = -(b² - 4ac)/4a How to find the vertex of the quadratic equationThe quadratic equation of the form ax² + bx + c can be compared with the equation of the form a(x - h)² + k which is the vertex form
In the vertex form, the vertex is easily seen an it is
v ( h, k ) and the value of h and k is defined to be
h = b / 2a
k = -(b² - 4ac) / 4a
Hence we can say that k is not equal to c and this makes Chen wrong
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someone help me pls asap
The formula for g(x) in terms of h(x) is: g(x) = h(x - 5) -1
What is Graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points.
The turning point (stationary point) of the curve.
the minimum point of a parabola that opens upwards
the maximum point of a parabola that opens downwards
To find the series of translations that transform the graph of y = h(x) onto y = g(x), compare the vertices of both graphs.
Vertex of h(x) = (-5, 7)
Vertex of g(x) = (0,6)
Find the difference of coordinates, the rule of translation right and up
x = 0 - (-5) = 5
y = 6- (7) = -1
h(x) translated 7 units right = h(x - 5)
h(x - 7) translated 5 units up = h(x - 5) -1
Therefore, the formula for g(x) in terms of h(x) is: g(x) = h(x - 5) -1
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Which expressions are polynomials?
Select each correct answer.
☐ 6x² + 5x
0x²+5x³
0 -7x²+3/5/2
D
-z+52
Answer:
number 1 and 2
Step-by-step explanation:
polynomial expressions have 4 or more numbers
Answer:
The first and last examples are polynomials
Step-by-step explanation:
The second example is not a polynomial because you cannot have fractional exponents.
The third example is not a polynomial because by cannot have variables in the denominator.
If the range of X is the set {0,1,2,3,4,5,6,7,8} and P(X=x) as defined in the following table:
x 0 1 2 3 4 5 6 7 8
P(X=x) 0.06528 0.3870 0.03062 0.0968 0.06913 0.0968 0.04846 0.01252 0.1935
Determine the mean and variance of the random variable.
(a) mean
(b) variance
If the range of X is the set {0,1,2,3,4,5,6,7,8} and P(X=x), then the,
(a) Mean = 3.42544
(b) Variance = 7.91
Given data,
If the range of X is the set {0,1,2,3,4,5,6,7,8} and P(X=x) as defined in the following table:
x 0 1 2 3 4 5 6 7 8
P(X=x) 0.06528 0.3870 0.03062 0.0968 0.06913 0.0968 0.04846 0.01252 0.1935
Mean = Σ [tex]x p(x)[/tex]
Mean = (0 * 0.06528) + (1*0.3870) + (2*0.03062) + (3*0.0968) + (4*0.06913) + (5*0.0968) + (6*0.04846) + (7*0.01252) + (8*0.1935)
Mean = 0 + 0.3870 + 0.06124 + 0.2904 + 0.2765 + 0.484 + 0.2907 + 0.0876 + 1.548
Mean = 3.42544
Mean = Σ [tex]x p(x)[/tex] = 3.42544
Σ [tex]x^{2} p(x)[/tex] = (0 * 0.06528) + ([tex]1^{2}[/tex]*0.3870) + ([tex]2^{2}[/tex]*0.03062) + ([tex]3^{2}[/tex]*0.0968) + ([tex]4^{2}[/tex]*0.06913) + ([tex]5^{2}[/tex]*0.0968) + ([tex]6^{2}[/tex]*0.04846) + ([tex]7^{2}[/tex]*0.01252) + ([tex]8^{2}[/tex]*0.1935)
Σ [tex]x^{2} p(x)[/tex] = (0 * 0.06528) + (1*0.3870) + (4*0.03062) + (9*0.0968) + (16*0.06913) + (25*0.0968) + (36*0.04846) + (49*0.01252) + (64*0.1935)
Σ [tex]x^{2} p(x)[/tex] = 0 + 0.3870 + 0.1224 + 0.8712 + 1.106 + 2.42 + 1.744 + 0.613 + 12.38
Σ [tex]x^{2} p(x)[/tex] = 19.6436
Variance = Σ [tex]x^{2} p(x)[/tex] - ( Σ [tex](xp(x))^{2}[/tex])
Variance = 19.6436 - [tex](3.42544)^{2}[/tex]
Variance = 19.6436 - 11.7336
Variance = 7.91
Therefore,
If the range of X is the set {0,1,2,3,4,5,6,7,8} and P(X=x), then the,
(a) Mean = 3.42544
(b) Variance = 7.91
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help pleaseeeeeeeeeeeeeeeee
Answer:
f⁻¹(x) = [tex]\frac{\sqrt{x}}{2}[/tex] , -[tex]\frac{\sqrt{x} }{2}[/tex]
Step-by-step explanation:
f(x) = 4x²
rewrite as:
y = 4x²
Interchange the variables, then solve for y:
x = 4y²
y² = x/4
y = √x/2, -√x/2
Answer:
f⁻¹(x) = [tex]\frac{\sqrt{x}}{2}[/tex] , -[tex]\frac{\sqrt{x} }{2}[/tex]
I need help with this I dont get it
The zeros of the quartic equation x⁴ - 2 · x² - 63 are x₁ = √(1 - √62), x₂ = √(1 + √62), x₃ = - √(1 - √62) and x₄ = - √(1 + √62).
How to find the zeros of a quadratic like quartic equation by factorization
In this problem we find a quadratic-like quartic equation, that is, a quadratic equation of the form:
y = a · x⁴ + b · x² + c
Where a, b, c are real coefficients.
From this expression in standard form we must determine its roots by using an application of algebra properties known as completing the square, which is transforming a part of the function into cubic square trinomial.
First, write the expression and equal it to zero:
x⁴ - 2 · x² - 63 = 0
Second, complete the square and simplify:
(x⁴ - 2 · x² + 1) = 63 - 1
(x² - 1)² = 62
x² - 1 = ± √62
x² = 1 ± √62
x = ± √(1 ± √62)
Third, write all the zeros of the quartic equation:
x₁ = √(1 - √62), x₂ = √(1 + √62), x₃ = - √(1 - √62), x₄ = - √(1 + √62)
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I want an answer
I want an answer
Third grade class :: 148 books
Fourth grade class :: 175 books
Total :: 323 books
1 box = 9 books.
323/9 =
36 box....
What type of system of linear equation has at least one solution?
The Consistent System Of Linear equations have at least one Solution , and the inconsistent system of linear equations have No Solution .
Let the system of two linear equations be given as : [tex]a_{1}x +b_{1}y =c_{1}[/tex] and [tex]a_{2}x +b_{2}y =c_{2}[/tex] ;
Case(i) If the equations satisfies the condition : [tex]\frac{a_{1} }{a_{2} } \neq \frac{b_{1} }{b_{2} }[/tex] ,
then linear equations has a unique solution and solutions are called as consistent .
Case(ii) If the equations satisfies the condition : [tex]\frac{a_{1} }{a_{2} } = \frac{b_{1} }{b_{2} } = \frac{c_{1} }{c_{2} }[/tex] ,
then linear equations has infinitely many solution and the solutions are called consistent .
Case(iii) If the equations satisfies the condition : [tex]\frac{a_{1} }{a_{2} } = \frac{b_{1} }{b_{2} } \neq \frac{c_{1} }{c_{2} }[/tex] ,
then the linear equations has No Solution and the solutions are called as inconsistent .
Therefore , if system has at least one solution , then solutions are consistent .
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In the year 2000, the United States had a population of about 281.4 million people; by 2010, the population had risen to about 308.7 million. Part A Find the 10-year continuous growth rate using
The 10 years continuous growth rate as calculated is 0.9259 % per year and the equation to model the population growth of the United States, and is used it to estimate the population in 2020 is P = 281.4e^(0.009 259t); 338.6 million .
Given,
P₀ = 281.4 million
P = 308.7 million
To calculate the growth rate
t = 2010 - 2000 = 10 yr
P = P₀e^(rt)
308.7 = 281.4e^(10r)
e^(10r) = 1.0970
10r = ln1.0970
r = (ln1.0970)/10 = (0.092 59)/10 = 0.009 259
r = 0.9259 % per year
To find the equation of population model
P = 281.4e^(0.009 259t)
here , P is in millions and
the number of years passed since 2002 is represented as t.
P = 281.4e^(0.009 259 × 20) = 281.4e^0.1852 = 281.4 × 1.203
P = 338.6 million
Therefore, the population in 2020 is assumed to be 338.6 million.
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The table shows the data from a random sample of fish that are collected from and then released into a lake.
Type of Fish Bass Eel Gar
Number of Fish 92 56 52
How many bass are estimated to be present if a sample of 1,000 fish are collected in the lake? Explain how you arrived at your solution.
There are 460 bass fish present if a sample of 1,000 fish is collected.
What is the ratio?We can determine how much of one quantity is in the other by comparing two amounts of the same units and finding the ratio. Ratios can be divided into two groups. One is the part-to-whole ratio, and the other is the part-to-part ratio. The link between two distinct entities or groupings is depicted by the part-to-part ratio.
Given table shows about type and number of fish,
Type of Fish Bass Eel Gar
Number of Fish 92 56 52
total number of fishes = 92 + 56 + 52 = 200
to find the number of Bass fish if the total fishes are 1000,
= (1000)92/200
= 460
Hence, there are 460 Bass fish present if a sample of 1,000 fish is collected in the lake.
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10% more than a number is 132 what is the number
Answer: 146
Step-by-step explanation:
100-10= 90so 132=90%132/90=1.461.46 x 100=146 :)X is a discrete random variable. The graph below defines a probability distribution for X.
What is the expected value of X?
The answer to the above question is B. Multiply the first equation by -2 and add the second equation.
What is equation?A mathematical statement that establishes the equality of two mathematical expressions is the definition of an equation in algebra. Consider the equation 3x + 5 = 14, in which the terms 3x + 5 and 14 are separated by the word "equal."
Given,
[tex]2x - 2y = 24\\4x + 7y=-40\-4x +4y = -96\\4x+7y = -40\\11y = -136\\y = -136/11[/tex]
The answer to the above question is B. Multiply the first equation by -2 and add the second equation.
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(02.07) a particular plant root grows 1.5 inches per month. how many centimeters is the plant root growing per month? (1 inch = 2.54 centimeters). (2 points) group of answer choices 0.59 centimeters 1.69 centimeters 3.81 centimeters 4.04 centimeters
The plant root is growing at a rate of 3.81 centimeters per month.
To find the number of centimeters that the plant root is growing per month, you need to convert the number of inches to centimeters. One inch is equal to 2.54 centimeters, so to convert from inches to centimeters, you need to multiply the number of inches by 2.54.
In this case, the plant root grows 1.5 inches per month. Multiplying this by 2.54 gives us 3.81 centimeters, which is the correct answer. Therefore, the plant root is growing at a rate of 3.81 centimeters per month.
The other answer choices are not correct because they do not give the correct number of centimeters that the plant root is growing per month.
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A particular plant root grows 1.5 inches per month, then 3.81 centimeters the plant root are growing per month.
In the given question, a particular plant root grows 1.5 inches per month.
We have to find how many centimeters the plant root is growing per month.
As we know that 1 inch = 2.54 centimeters
To convert 1.5 inches in centimeters we multiply 1.5 by 2.54 because in 1 inch has 2.54 centimeters. After multiply we can easily find the answer in centimeters.
So 1.5 inch = 1.5*2.54 centimeters
1.5 inch = 3.81 centimeters
Hence, a particular plant root grows 1.5 inches per month, then 3.81 centimeters the plant root are growing per month.
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The scatter plot shows the relationship between the amount of time students in a mathematics class studied for an exam and their score on the exam.
scatter plot titled mathematics class, with the x axis labeled time studying in minutes and the y axis labeled score on exam with points at 0 comma 30, 10 comma 35, 30 comma 37, 40 comma 37, 50 comma 40, 60 comma 45, 70 comma 55, 75 comma 60, 80 comma 70, 85 comma 78, 90 comma 83, 95 comma 90, 100 comma 95, and 105 comma 100
Which of the following describes the pattern of association for the graph?
There is a negative linear association.
There is a negative nonlinear association.
There is a positive linear association.
There is a positive nonlinear association.
The option that best describes the pattern of association for the scatterplot graph is; There is a positive nonlinear association.
How to Interpret Scatter Plot?In statistics, we say that two random variables have a positive correlation if Y tends to increase as X increases.
Meanwhile, we can say that two random variables have a negative correlation if Y tends to decrease as X increases.
Now, when there is a relationship between the x and y variables, we can say that there is some type of association such as linear, quadratic, exponential e.t.c
Now, in this given scatterplot, we can see that y almost certainly increases as x increases and as such this is a positive correlation. Similarly, we see that it is not a linear relationship as it looks like an exponential curve. Thus, it is a non linear association.
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Answer:
The option that best describes the pattern of association for the scatterplot graph is; There is a positive nonlinear association.
Step-by-step explanation:
Rewrite the expression with a rational exponent as a radical expression.
five to the three fourths power all raised to the two thirds power
Group of answer choices
A. the cube root of five squared
B. the twelfth root of five
C. the square root of five
D. the cube root of five the fourth power
The radical exponent for five to the three fourths power all raised to the two thirds power is C. the square root of five.
What is the exponent?The exponent is the number of times that a number is multiplied by itself. It should be noted that the power is an expression which shows the multiplication for the same number. For example, in 6⁴ , 4 is the exponent and 6⁴ is called 6 raise to the power of 4.
In this situation, five to the three fourths power all raised to the two thirds power will be:
= 5^3/4(^2/3)
= 5^1/2
The correct option is C
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Match each situation with whether it would be a Linear or Exponential relationship.
All the situation are Exponential relationship accept the last one.
What is a linear function?A linear function is modeled by the following rule:
y = mx + b
In which: m is the slope, which is the rate of change, that is, the change in y divided by the change in x. b is the y-intercept, which is the the value of y when the function crosses the x-axis, that is, when x = 0.
Given that "you work as a taxi driver. you earn an average of $75 in tips each day".
That is, 75^x
This is a Exponential equation.
2. The number of visitors to the eiffel tower in paris increases by 1.5% each year.
This is a Exponential equation.
The number of tadpoles in the pond triples each day.
This is a Exponential equation.
Also, every year 39 million cars cross the golden gate bridge in san francisco.
This is a Linear equation.
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PLS HELP ME THIS IS GEOMETRY PLS HELP 100 POINTS
How do you identify exponential decay and growth?
The general form of an exponential decay function is f(a) = P . (1 - r)ᵃ, while the general function of growth function is f(a) = P . (1 + r)ᵃ. Hence, if the factor (1 - r) is less than 1, it is a decay function, while if the factor (1 + r) is greater than 1, it is a growth function
The general exponential decay function can be written as:
f(a) = P . (1 - r)ᵃ
Where:
P = initial quantity
f(a) = remaining quantity at time a
a = time period
r = decay rate
(1 - r) = decay factor
On the other hand, the general exponential growth function can be written as:
f(a) = P . (1 + r)ᵃ
where:
r = growth rate
(1 + r) = growth factor
Hence, the difference between decay function and growth function is: the factor in decay faction is less than 1, while in growth function, the factor is greater than 1.
Example:
f(a) = 6 . (0.25)ᵃ
This is an exponential decay function because the factor is less than 1, that is 0.25
f(a) = 10 . (3)ᵃ
This is not an exponential decay function, but a growth function, because the factor is greater than 1, that is 3
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what value of x is the solution to the equation?
Answer:
A
Step-by-step explanation:
[tex]\frac{4}{5}[/tex] x - [tex]\frac{3}{2}[/tex] = [tex]\frac{1}{4}[/tex]
multiply through by 20 ( the LCM of 5, 2, 4 ) to clear the fractions
16x - 30 = 5 ( add 30 to both sides )
16x = 35 ( divide both sides by 16 )
x = [tex]\frac{35}{16}[/tex]
If $m$ workers can complete a job in $d$ days, how many days will it take $n$ workers, working at the same rate, to complete one-third of the job
The one-third of the job will take md/3n days. The result is obtained by using the concept of inverse proportion.
What is inverse proportion?
Inverse proportion is a proportionality relationship when one value increases and the other decreases.
Assuming that the workers are working at the same rate, the more workers will complete the job more quickly. It means the more workers that do the job, the less time needed. We use inverse proportion to solve this problem.
We have workers and time to complete a job. Let's say e is the time for n workers to complete the job.
m workers work d days.n workers work e days.By the inverse proportion concept, we get
m/n = e/d
e = md/n days
To complete one-third of the job, they need
⅓e = ⅓ (md/n)
⅓e = md/3n
Hence, it will take md/3n days to complete the one-third of the job.
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A restaurant can only have 285 customers at one time.
At 12:00 p.m., this restaurant had 216 customers.
Part A:
3
Over the course of a lunch period, of the customers
leave and 147 new customers come to the restaurant.
Does the new amount of customers exceed 285?
Show your work.
Part B:
At dinner, there are 47 tables of 4 and 16 tables of 5.
How many customers are in the restaurant? Show your
work.
The amount of customers exceed 285 and when there are 47 tables of 4 and 16 tables of 5 the number so new customers is 17.
What is the amount customers in the restaurant?Given,
The numbers of customers one at a time is 285
At 12 pm it has 216 customers.
Part A :
To check new amount of customers exceeds 285 or not.
Also given 147 new customers.
So by substituting values:
216 x (1 - 1/3) + 147
= 144 + 147
= 291
Since 291 > 285
Therefore the new number of customers exceed 285.
Part B :
To find number of customers in the restaurant when there are 47 tables of 4 and 16 tables of 5.
47 x 4 + 16 x 5
= 188 + 80
= 268
So, 285 - 268
= 17
Therefore there are 17 new customers in the restaurant.
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Solve the following system of equations for x. Write your answer as a point (x,y). Show all your work! 2x - y = 4. Y - x =4
Answer:
(8, 12)
Step-by-step explanation:
You want to solve the system ...
2x -y = 4y -x = 4SolutionAdd the two equations:
(2x -y) +(y -x) = (4) +(4)
x = 8 . . . . . . . . . . . . simplify
y = 4 +x . . . . . . rearrange the second equation
y = 4 +8 = 12
The solution is (x, y) = (8, 12).
What property of triangle congruence states that if a â B then B â A?
The property of the triangle congruence state that a ≅ B then B ≅ A are:
The state of each angles A is ∠A≅∠A . An angle is congruent to itself angle.For every angles A and B and if ∠A≅∠B , then ∠B≅∠A . The order of congruence of the angle does not matter.What is the triangle?The triangle is a polygon that has 3 edge and vertices. Triangle is one of the basic shape in the geometric. The area of the triangle is formulated as base of the triangle * height of triangle x 0,5. The value of three triangle edge degree is 180°.
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Drag the tiles to the correct boxes. Not all tiles will be used.
Determine which steps are used to find the product shown. Put the steps in order in which they would be performed.
The value of the expression [(x² + 7x + 10) / (x² + 4x + 4)] · [(x² + 3x + 2) / (x² + 6x + 5)] will be 1.
What is Algebra?Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.
The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.
The expression is given below.
⇒ [(x² + 7x + 10) / (x² + 4x + 4)] · [(x² + 3x + 2) / (x² + 6x + 5)]
Simplify the expression, then we have
⇒ [(x² + 7x + 10) / (x² + 4x + 4)] · [(x² + 3x + 2) / (x² + 6x + 5)]
⇒ [(x + 5)(x + 2) / (x + 2)(x + 2)] · [(x + 2)(x + 1) / (x + 5)(x + 1)]
⇒ 1
The value of the expression [(x² + 7x + 10) / (x² + 4x + 4)] · [(x² + 3x + 2) / (x² + 6x + 5)] will be 1.
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Answer:see photo #4
Step-by-step explanation:
3.
x6.xx³x6+3 = x⁹
Check the box above the error
Describe the error
Type out the correction
- Type out the correct answer
-
4. 34.23= 64+3
Check the box above the error
Describe the error
Type out the correction
Type out the correct answer
-
LOOK AT THE PHOTO
Answer:
3. x^10
4. 648
Step-by-step explanation:
See the attached worksheet
there is a sale for pebbles. 1KG is $4.50, how many kilograms you can buy with $10
Answer:
20 per kilogram. then it is necessary to know just what units are being used for the purchase. This information is given under 'Comparative Costs per Unit'.
Step-by-step explanation:
Help I dont understand this question although it is very easy +50 points
Answer:
3,744 [tex]cm^{2}[/tex]
Step-by-step explanation:
Front is a trapezoid
a = 1/2([tex]base_{1}[/tex] + [tex]base_{2}[/tex])h
a = 1/2(29 +12)24
a = 492
the back is the same value 492
Bottom
29 x 30 = 870
Right sides
30 x 26 = 780
Left side
25 x 30 = 750
Top
12 x 30 = 360
492 + 492 + 870 + 780 + 750 + 360 = 3744[tex]cm^{2}[/tex]
An auto repair shop charges $50 plus $25 per hour.
Answer:
y=50+25x
Step-by-step explanation:
x= 25 each hour
add by 25
and it will give you your output.
Write the equation the line through the point b) (1,3) with slope = -4
The equation of the line passing through the points (1,3) with slope = -4 is
y = -4x + 7
What is the Equation of a Line?The equation of a line can be formed with the help of the slope of the line and a point on the line. The slope of the line is the inclination of the line with the positive x-axis and is expressed as a numeric integer, fraction, or the tangent of the angle it makes with the positive x-axis. The point refers to a point in the coordinate system with the x coordinate and the y coordinate.
m = (y - y1) / (x - x1)
where m = -4
y1 = 3
x1 = -1
-4 = (y - 3) / (x - 1)
-4(x - 1) = y - 3
-4x + 4 = y - 3
y = -4x + 7
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A graduated cylinder (approximate as a regular cylinder) has a radius of 1.045 cm and a height of 30.48 cm. What is the volume of the cylinder in
The volume of the cylinder is approximately 478.9 cm3.
To find the volume of a cylinder, you can use the formula:
[tex]Volume = \pi r^2h[/tex]
where r is the radius of the base of the cylinder and h is the height of the cylinder.
In this case, the radius of the cylinder is 1.045 cm and the height is 30.48 cm, so the volume is approximately 478.9 cm3. This is found by plugging the given values into the formula and rounding to the nearest tenth:
Volume = [tex]\pi (1.045 cm)^2(30.48 cm)[/tex] = 478.9 cm3.
So, the volume of the cylinder is approximately 478.9 cm3.
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Complete Question:
A graduated cylinder (approximate as a regular cylinder) has a radius of 1.045 cm and a height of 30.48 cm. What is the volume of the cylinder in cm3 (use 3.141 for TT)? Round to the nearest tenths.
The equation M = 1,800 (1.02) models the number of
members, M, of a gym t years after the gym opens. Which statement is false.
•The membership rates are increasing 20% each year.
• 1,800 members joined the gym when it first opened.
• This model shows exponential growth.
• The gym would have about 1,910 members after 3 years.
The false statement is that the membership rates are increasing 20% each year.
What are exponential functions?When the expression of function is such that it involves the input to be present as exponent (power) of some constant, then such function is called exponential function. There usual form is specified below. They are written in several such equivalent forms.
We are given the equation models the number of members, M, of a gym t years after the gym opens.
[tex]M = 1,800 (1.02) ^t[/tex]
Now if the t time is 3 year then;
[tex]M = 1,800 (1.02) ^t\\\\M = 1,800 (1.02) ^3\\\\M = 1910.14[/tex]
So the last option is True.
Now we can see that the model shows exponential growth. so it is true also.
From the equation the inital part is that 1,800 members joined the gym when it first opened. that is also true.
Hence, the statement is false.
•The membership rates are increasing 20% each year.
Learn more about exponential regression here:
https://brainly.com/question/12608685
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