Find the roots of the equation below. 7x2 + 3 = 8x
A) -4/7 (+ or -) (sqrt 5)/7
B) 4/7 (+ or -) (sqrt 5)/7
C) -4/7 (+ or -) i(sqrt 5)/7
D) 4/7 (+ or -) i(sqrt 5)/7
Answer:
x=4+-isqrt(5/7
Step-by-step explanation:
If the hypotenuse and an acute angle of one right triangle are equal to the hypotenuse and an acute angle of another right triangle, then the triangles are congruent by the HA theorem. If a leg and an acute angle of one right triangle are equal to the corresponding parts of another right triangle, then the triangles are congruent by the _______ theorem.
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Elise pays $21.75 for 5 student tickets to the fair.what is the cost of each student ticket
Answer:
Cost of each student ticket is, $4.35
Step-by-step explanation:
Given the statement: Elise pays $21.75 for 5 student tickets to the fair.
Unit rate defined as the rates are expressed as a quantity of 1, such as 3 feet per second or 6 miles per hour, they are called unit rates.
[tex]unit rate = \frac{Total ticket Cost}{No of students}[/tex]
Given total cost paid by Elise = $21.75
Number of students = 5
then;
Unite rate per student = [tex]\frac{21.75}{5} = \$4.35[/tex]
Therefore, the cost of each student ticket is, $4.35
find the factorization of the polynomial below. Enter each factor as a polynomial in descending order.
x^2 + 5x + 6 ...?
What is the equation of this line in slope-intercept form?
y=−3x+2y=−3x+2
y=−1/3x+2y=−1/3x+2
y=3x−2y=3x−2
y = 3x + 2
Answer:
y=3x+2 is in slope intercept form. If you have a graph to go with this problem, if this equation is correct there should be points on (0,2) and (1,3)
Step-by-step explanation:
what line is parallel to x-3y=24
What is the area of the triangle in the diagram?
Answer:
The answer is the option A
[tex]\frac{1}{2}(\sqrt{[(y2)^{2}+(x2)^{2}]*[(y1)^{2}+(x1)^{2}]})[/tex]
Step-by-step explanation:
see the attached figure with letters to better understand the problem
we know that
The area of the triangle is equal to
[tex]A=\frac{1}{2}bh[/tex]
where
b is the base
h is the height
In this problem
[tex]b=AB, h=AC[/tex]
the formula to calculate the distance between two points is equal to
[tex]d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}[/tex]
Find the distance AB
[tex]A(0,0), B(x2,y2)[/tex]
substitute
[tex]dAB=\sqrt{(y2-0)^{2}+(x2-0)^{2}}[/tex]
[tex]dAB=\sqrt{(y2)^{2}+(x2)^{2}}[/tex]
Find the distance AC
[tex]A(0,0), C(x1,y1)[/tex]
substitute
[tex]dAC=\sqrt{(y1-0)^{2}+(x1-0)^{2}}[/tex]
[tex]dAC=\sqrt{(y1)^{2}+(x1)^{2}}[/tex]
Find the area of the triangle
we have
[tex]b=\sqrt{(y2)^{2}+(x2)^{2}}, h=\sqrt{(y1)^{2}+(x1)^{2}}[/tex]
substitute
[tex]A=\frac{1}{2}(\sqrt{(y2)^{2}+(x2)^{2}})(\sqrt{(y1)^{2}+(x1)^{2}})[/tex]
[tex]A=\frac{1}{2}(\sqrt{[(y2)^{2}+(x2)^{2}]*[(y1)^{2}+(x1)^{2}]})[/tex]
Answer:
A for plato users
Step-by-step explanation:
How many feet is 132 inches??
Critical Thinking: Buses on your route run every 9 minutes from 6:00 AM to 10:00 AM. You get to the bus stop at 7:16 AM,…
a. What is the maximum amount of time you should have to wait for the bus?
b. How many minutes after the buses begin running at 6:00 AM, do you arrive at the bus stop?
c. What time does the first bus of the day arrive at the bus stop?
...?
the inverse sine of sin(2pi/3) = 120degrees, correct? ...?
The golden ratio or golden mean is represented as (1 + √5) : 2.
What is its decimal value to the nearest thousandth? (Hint: Use a calculator to evaluate (1+√5) divided by 2.)
The golden ratio or golden mean is approximately 1.618 when calculated to the nearest thousandth using a calculator to evaluate (1 + √5) / 2.
The golden ratio or golden mean is a number often encountered in mathematics and art, and it is commonly represented by the Greek letter phi (φ). It can be expressed mathematically as (1 + √5) / 2. To find its decimal value to the nearest thousandth, we use a calculator to perform the operation.
First, calculate the square root of 5, then add 1 to the result. After this, divide the sum by 2. This will give us the golden ratio:
√5 ≈ 2.236
1 + √5 ≈ 3.236
(1 + √5) / 2 ≈ 1.618
So, to the nearest thousandth, the decimal value of the golden ratio is 1.618.
which of the following is a factor of 7x^2 -12x-4?
a) x+2
b)none of the above
c)7x-2
d)x-4 ...?
Answer:
The factors of the 7x² - 12x - 4 = 0 are (7x + 2)(x -2) .
Option (b) is correct i.e none of the above .
Step-by-step explanation:
As the expression given in the question.
7x² - 12x - 4 = 0
7x² - 14x + 2x - 4 = 0
7x (x - 2) + 2(x - 2) = 0
(7x + 2)(x -2) = 0
Thus the factors of the 7x² - 12x - 4 = 0 are (7x + 2)(x -2) .
Option (b) is correct i.e none of the above .
What is 1/2 divided by 4?
solve the differential equation:
(1-2x^2-2y)dy/dx=4x^3+4xy
Answer:
[tex]u=-x^4-2x^2y+y-y^2[/tex]
Step-by-step explanation:
We are given that
[tex](1-2x^2-2y)\frac{dy}{dx}=4x^3+4xy[/tex]
We have to solve the given differential equation
[tex](1-2x^2-2y)dy=(4x^3+4xy)dx[/tex]
[tex](1-2x^2-2y)dy-(4x^3+4xy)dx=0[/tex]
Compare with [tex]Mdx+ndy=0[/tex]
Then, we get [tex]M=-(4x^3+4xy),N=(1-2x^2-2y)[/tex]
Exact differential equation
[tex]M_y=N_x[/tex]
[tex]M_y=-4x[/tex]
[tex]N_x=-4x[/tex]
[tex]M_y=N_x[/tex]
Hence, the differential equation is an exact differential equation.
Solution of exact differential is given by
[tex]u=\int M(x,y)dx+K(y)[/tex] where K(y) is a function of y.
[tex]u=\int -(4x^3+4xy) dx+k(y)[/tex] y treated as constant
[tex]u=-x^4-2x^2y+k(y)[/tex]
[tex]u_y=N[/tex]
[tex]-2x^2+k'(y)=1-2x^2-2y[/tex]
[tex]K'(y)=1-2y[/tex]
[tex]k(y)=y-y^2[/tex]
Substitute the value then we get
Then, [tex]u=-x^4-2x^2y+y-y^2[/tex]
Final answer:
The given differential equation is exact, and by integrating the respective terms and finding the function H(y), the solution for z(x, y) for the differential equation is determined to be
-x⁴ + y - y² + C, where C is a constant.
Explanation:
To solve the differential equation (1-2x² - 2y)dy/dx = 4x³ + 4xy, let's rearrange the equation in the form M(x, y)dy + N(x, y)dx = 0, which is the standard form for a first-order differential equation. We can rewrite our equation as (-4x³ - 4xy)dx + (1-2x² - 2y)dy = 0.
Now, we check if the equation is exact, that is, if ∂M/∂y = ∂N/∂x. If it is exact, there exists a function z(x, y) such that dz = M dy + N dx.
In this case, ∂M/∂y = -4x, and ∂N/∂x = -4x. Since the partial derivatives are equal, the differential is exact, meaning there exists some function z(x, y) such that dz = Ndx + Mdy. To find z(x, y), we integrate N with respect to x and M with respect to y and combine the resulting functions, making sure to include the functions of the other variable that may arise from the partial integration.
For N(x, y), we integrate -4x³dx to get -x⁴. For M(y), we integrate (1-2y)dy to get y - y². Thus z(x, y) = -x⁴ + y - y² + H(y), where H(y) is a function of y.
To find H(y), differentiate z with respect to y and equate it to M: dz/dy = 1 - 2y + H'(y) = 1 - 2y, which implies that H'(y) = 0, hence H(y) is a constant. Therefore, the function that satisfies the differential equation is z(x, y) = -x⁴ + y - y² + C, where C is a constant.
Trevor solved the system of equations below. What mistake did he make in his work?
2x + y = 5
x − 2y = 10
y = 5 − 2x
x − 2(5 − 2x) = 10
x − 10 + 4x = 10
5x − 10 = 10
5x = 0
x = 0
2(0) + y = 5
y = 5
He should have substituted 5 + 2x
He combined like terms incorrectly, it should have been 4x instead of 5x
He subtracted 10 from the right side instead of adding 10 to the right side
He made no mistake ...?
Answer:
Give the guy above me Brainlyist
Step-by-step explanation:
What is 8 1/4 devided by 1/2?
Which of the following equations will have a negative solution?
A.m - 4 2/3 = 7 1/2
B.m - 71/2 = 4 2/3
C.7 1/2 + m = 4 2/3
D.-7 1/2 + m = 4 2/3
Since the value of m is -17/6, equation c has a negative solution.
What is the equation?An equation is a statement that two expressions, which include variables and/or numbers, are equal. In essence, equations are questions, and efforts to systematically find solutions to these questions have been the driving forces behind the creation of mathematics.
It is given that,
7 1/2 + m = 4 2/3
We have to apply the arithmetic operation in which we do the addition of numbers, subtraction, multiplication, and division. It has basic four operators that are +, -, ×, and ÷.
15/2+m=14/3
Convert the fraction value and rearrange the equation as follows,
m=14/3-15/2
m=-17/6
Thus, the value of m is -17/6, equation c has a negative solution.
Learn more about the equation here,
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Henry is saving money for college. He earns $210 each week working part time after school and the weekends. Henry currently has $2,240 in savings. His parents put $100 in his savings account each week and he saves one-third of his paycheck each week. Which expression represents the situation. (n represents the number of weeks)
Answer:
[tex]f(n)=2240+(\frac{170}{Week}).n[/tex]
Step-by-step explanation:
In order to make an expression that represents the situation we need to make a function that represents Henry's savings.
This will be a function ''f(n)'' because it will depend of the variable ''n'' which is the number of weeks.
Let's start making the function by reading the problem.
''He earns $210 each week working part time after school and the weekends''
We can write :
[tex]f(n)=(\frac{210}{Week}).n[/tex]
Where ''210'' is actually $210
''Henry currently has $2240 in savings'' ⇒ We need to add this amount of money to the function.
[tex]f(n)=(\frac{210}{Week}).n+2240[/tex]
''His parents put $100 in his savings account each week and he saves one-third of his paycheck each week'' ⇒ We need to add ($100).n to the expression due to his parents and multiply by [tex]\frac{1}{3}[/tex] the expression that represents its paycheck ⇒
[tex]f(n)=(\frac{1}{3}.\frac{210}{Week}).n+2240+(\frac{100}{Week}).n[/tex]
Now, if we work with the expression :
[tex]f(n)=(\frac{70}{Week}).n+2240+(\frac{100}{Week}).n[/tex]
[tex]f(n)=2240+(\frac{170}{Week}).n[/tex]
Where the units of ''2240'' and ''170'' are $.
That is the final expression which represents the situation.
An arhitect desings a rectangular flower garden such that the width is exactly two-thirds of the length. If 280 feet of antique picket fencing are to be used to enclose the garden, find the dimensions of the garden.
how do you find volume of a cube
The derivative of f(x)=(x^4/3)-(x^5/5) attains its maximum at x= ? ...?
The value of x is [tex]\boxed{\frac{4}{3}}[/tex] for which the derivative of [tex]f\left( x \right) =\dfrac{{{x^4}}}{3} - \dfrac{{{x^5}}}{5}[/tex] attains the maximum.
Further explanation:
Given:
The function is [tex]f\left( x \right) =\dfrac{{{x^4}}}{3} - \dfrac{{{x^5}}}{5}.[/tex]
Explanation:
The given function is [tex]f\left( x \right)=\dfrac{{{x^4}}}{3} - \dfrac{{{x^5}}}{5}.[/tex]
Differentiate the above equation with respect to x.
[tex]\begin{aligned}\frac{d}{{dx}}f\left( x \right) &= \frac{d}{{dx}}\left( {\frac{{{x^4}}}{3} - \frac{{{x^5}}}{5}} \right)\\&= \frac{{4{x^3}}}{3} - \frac{{5{x^4}}}{5}\\&= \frac{{4{x^3}}}{3} - {x^4}\\\end{aligned}[/tex]
Again differentiate with respect to x.
[tex]\begin{aligned}\frac{{{d^2}}}{{d{x^2}}}f\left( x \right) &= \frac{{{d^2}}}{{d{x^2}}}\left( {\frac{{4{x^3}}}{3} - {x^4}} \right)\\&=\frac{{3 \times 4{x^2}}}{3} - 4{x^3}\\&= 4{x^2} - 4{x^3}\\\end{aligned}[/tex]
Substitute the first derivative equal to zero.
[tex]\begin{aligned}\frac{d}{{dx}}f\left( x \right)&= 0\\\frac{{4{x^3}}}{3} - {x^4}&= 0\\\frac{{4{x^3}}}{3} &= {x^4}\\\frac{4}{3}&= \frac{{{x^4}}}{{{x^3}}}\\\frac{4}{3}&= x\\\end{aligned}[/tex]
The value of x is [tex]\boxed{\frac{4}{3}}[/tex] for which the derivative of [tex]f\left( x \right)=\dfrac{{{x^4}}}{3} - \dfrac{{{x^5}}}{5}[/tex] attains the maximum.
Learn more:
1. Learn more about inverse of the functionhttps://brainly.com/question/1632445.
2. Learn more about equation of circle brainly.com/question/1506955.
3. Learn more about range and domain of the function https://brainly.com/question/3412497
Answer details:
Grade: High School
Subject: Mathematics
Chapter: Application of derivatives
Keywords: Derivative, attains, maximum, value of x, function, differentiate, minimum value.
Which graph represents the solution set for the system 2x + 5y ≤ 9 and 3x + 5y ≤ 9?
Answer:
The graph representing the solution is given below.
Step-by-step explanation:
We are given the system of inequality is,
[tex]2x + 5y\leq 9[/tex]
[tex]3x + 5y \leq 9[/tex]
Zero Test states that,
'After substituting the point (0,0) in the inequalities, if the result is true, then the solution region id towards the origin. If the result is false, the solution region is away from the origin'.
So, upon substituting (0,0) in the given inequalities, we get,
[tex]2x + 5y\leq 9[/tex] implies 0≤ 9, which is true.
[tex]3x + 5y \leq 9[/tex] implies 0≤ 9, which is true.
Thus, the solution region for both the inequalities is towards the origin.
Hence, upon plotting, the graph representing the solution set is given below.
For the function below, find the vertex, axis of symmetry, maximum or minimum value, and the graph of the function.
f(x)=(x^2/2) + 2x +1 ...?
Answer and Explanation :
Given : Function [tex]f(x)=\frac{x^2}{2}+2x+1[/tex]
To find : The vertex, axis of symmetry, maximum or minimum value, and the graph of the function.
Solution :
The quadratic function is in the form, [tex]y=ax^2+bx+c[/tex]
On comparing, [tex]a=\frac{1}{2}[/tex] , b=2 and c=1
The vertex of the graph is denote by (h,k) and the formula to find the vertex is
For h, The x-coordinate of the vertex is given by,
[tex]h=-\frac{b}{2a}[/tex]
[tex]h=-\frac{2}{2(\frac{1}{2})}[/tex]
[tex]h=-\frac{2}{1}[/tex]
[tex]h=-2[/tex]
For k, The y-coordinate of the vertex is given by,
[tex]k=f(h)[/tex]
[tex]k=\frac{h^2}{2}+2h+1[/tex]
[tex]k=\frac{(-2)^2}{2}+2(-2)+1[/tex]
[tex]k=2-4+1[/tex]
[tex]k=-1[/tex]
The vertex of the function is (h,k)=(-2,-1)
The x-coordinate of the vertex i.e. [tex]x=-\frac{b}{2a}[/tex] is the axis of symmetry,
So, [tex]x=-\frac{b}{2a}=-2[/tex] (solved above)
So, The axis of symmetry is x=-2.
The maximum or minimum point is determine by,
If a > 0 (positive), then the parabola opens upward and the graph has a minimum at its vertex.
[tex]a=\frac{1}{2} >0[/tex] so, the parabola opens upward and the graph has a minimum at its vertex.
The Minimum value is given at (-2,-1)
Now, We plot the graph of the function
At different points,
x y
-4 1
-2 -1
0 1
Refer the attached figure below.
Quick Search Inc. has hired you to work on a new search algorithm for their data base. Your annual salary is $52,680 and you are paid biweekly. If you are planning your monthly budget based on a two week pay period, how much do you get paid every two weeks? Round your answer to the nearest cent. a. $2,026.15 c. $2,680.10 b. $2,506.32 d. $2,751.14
$2,026.15 is the payment for every two weeks
What is Equation?Two or more expressions with an Equal sign is called as Equation.
Given that annual salary is $52,680 and you are paid biweekly.
In a year we have 52 weeks
If you are planning your monthly budget based on a two week pay period
So there are 52/2 = 26 periods where you get paid
For every two weeks we get paid of 52680/26 = 2,026.153846
Hence, $2,026.15 is the payment for every two weeks
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write 2/5 as a decimal
what is the standard form of this number
1.46e-6
Answer:
0.00000146
Step-by-step explanation:
Your welcome, and you better call saul
The standard form of 1.46e - 6 is 0.00000146.
To convert the number 1.46e-6 to standard form, we need to move the decimal point to the left as many times as indicated by the exponent of the scientific notation, which is -6 in this case.
This means moving the decimal point six places to the left.
Start with the number in scientific notation:
1.46e - 6.
Move the decimal point six places to the left (because of the negative exponent):
0.00000146.
4 (x+5)=3 (x-2)-2 (x+2)
Does the following system have 1 solution, no solutions, or infinite solutions? y=2x+6 and y=8x+6
1 solution
No Solution
Infinite Solution
Max can mow a lawn in 45 minutes. Jan takes twice as long to mow the same lawn. If they work together, how long will it take them to mow the lawn?
Answer:
The answer is A, 30
Step-by-step explanation:
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