Answers
The value of 6x-5y = -31
The given equations are 2x-y=-7 -eq (1)
& 4x=-3y+16 -eq (2)
Multiplying eq (1) with 2 and rearranging to get equation as follows
(2x-y=-7)*2
4x-2y=-14 -eq (3)
Now, subtracting eq (3) from eq (2) to get y.
(4x+3y=16) - (4x-2y=-14)
5y=30
y=5
Substituting y=5 in eq (1) to get x.
2x-5=-7
x=-1
Now to determine 6x-5y substitute obtained values of x & y.
6*(-1)-5(5)=-31
Hence the value of 6x-5y=-31.
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Related Questions
Qué expresión es igual a 4.6?
a. 1.6 + (3 × 4) – 2 ÷ 2
b. 1.6 + 3 × 4 – 2 ÷ 2
c. [1.6 + (3 × 4)] – (2 ÷ 2)
d. (1.6 + 3) × (4 – 2) ÷ 2
Answers
The correct expression that is equal to 4.6 is option c. [1.6 + (3 × 4)] – (2 ÷ 2)
Let's evaluate each expressions using the BODMAS rule of mathematics,
a. 1.6 + (3 × 4) – 2 ÷ 2
= 1.6 + 12 - 1
= 12.6
b. 1.6 + 3 × 4 – 2 ÷ 2
= 1.6 + 12 - 1
= 12.6
c. [1.6 + (3 × 4)] – (2 ÷ 2)
= [1.6 + 12] - 1
= 12.6
d. (1.6 + 3) × (4 – 2) ÷ 2
= 4.6 × 2 ÷ 2
= 4.6
BODMAS is an acronym used to remember the order of operations in mathematics: Brackets, Orders, Division, Multiplication, Addition, Subtraction. It is used to perform calculations in the correct order to obtain the correct result. Therefore, the correct answer is (c).
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Complete question - Which expression is equal to 4.6?
a. 1.6 + (3 × 4) – 2 ÷ 2
b. 1.6 + 3 × 4 – 2 ÷ 2
c. [1.6 + (3 × 4)] – (2 ÷ 2)
d. (1.6 + 3) × (4 – 2) ÷ 2
Kristin made a scatter plot to represent the relationship between the temperature and the number of bottles of water sold at her concession stand at a soccer tournament. Which is a description of the location of the point Kristin will add to represent the 13 bottles of water that were sold when the temperature was 39 degrees Fahrenheit? Select one:
O Top left of the scatter plot
OBottom right of the scatter plot
O Top right of the scatter plot
OBottom left of the scatter plotâ
Answers
The location of the point Kristin will add to represent the 13 bottles of water sold at 39 degrees Fahrenheit is the bottom left of the scatter plot.
A scatter plot represents the relationship between two variables. In this case, the temperature (independent variable) is plotted along the x-axis, while the number of bottles of water sold (dependent variable) is plotted along the y-axis. As the temperature increases, it is expected that more bottles of water would be sold.
The bottom left area of the scatter plot is where lower values of both temperature and the number of bottles sold would be found. Since 39 degrees Fahrenheit is relatively low and 13 bottles of water is a lower quantity, the point representing this data will be in the bottom left quadrant of the scatter plot.
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Complete question:
Kristin made a scatter plot to represent the relationship between the temperature and the number of bottles of water sold at her concession stand at a soccer tournament. Which is a description of the location of the point Kristin will add to represent the 13 bottles of water that were sold when the temperature was 39 degrees Fahrenheit? Select one:
O Top left of the scatter plot
O Bottom right of the scatter plot
O Top right of the scatter plot
O Bottom left of the scatter plotâ
HELP PLEASE
I have no idea what to do anything I try fails.
Answers
Answer:
The distance between these parallel lines is 2 - (-7) = 9 units.
1) Use Lagrange multipliers to find the maximum and minimum values of the function subject to the given constraint. (If an answer does not exist, enter DNE.)
f(x, y) = 5x^2 + 5y^2; xy = 1
2) Find the extreme values of f subject to both constraints. (If an answer does not exist, enter DNE.)
f(x, y, z) = x + 2y; x + y + z = 6, y^2 + z^2 = 4
Answers
The maximum and minimum values for given function f(x, y) = 5x² + 5y² subject to xy = 1 are both 10. The extreme values of f(x, y, z) = x + 2y; x + y + z = 6, y² + z² = 4 subject to both constraints are 7 and -4.
We can use Lagrange multipliers to find the maximum and minimum values of f(x, y) subject to the constraint xy = 1.
First, we set up the Lagrange function
L(x, y, λ) = 5x² + 5y² + λ(xy - 1)
Then, we take partial derivatives of L with respect to x, y, and λ and set them equal to 0
∂L/∂x = 10x + λy = 0
∂L/∂y = 10y + λx = 0
∂L/∂λ = xy - 1 = 0
Solving these equations simultaneously, we get
x = ±√2, y = ±√2, λ = ±5/2√2
We also need to check the boundary points where xy = 1, which are (1, 1) and (-1, -1). We evaluate f at these points and compare them to the values we get from the Lagrange multipliers.
f(√2, √2) = 10, f(-√2, -√2) = 10
f(1, 1) = 10, f(-1, -1) = 10
So the maximum and minimum values of f(x, y) subject to xy = 1 are both 10.
We can use Lagrange multipliers to find the extreme values of f(x, y, z) subject to both constraints.
First, we set up the Lagrange function
L(x, y, z, λ, μ) = x + 2y + λ(x + y + z - 6) + μ(y² + z² - 4)
Then, we take partial derivatives of L with respect to x, y, z, λ, and μ and set them equal to 0
∂L/∂x = 1 + λ = 0
∂L/∂y = 2 + λ + 2μy = 0
∂L/∂z = λ + 2μz = 0
∂L/∂λ = x + y + z - 6 = 0
∂L/∂μ = y² + z² - 4 = 0
Solving these equations simultaneously, we get
x = -1, y = 2, z = 3, λ = -1, μ = -1/2
x = 3, y = -2, z = -1, λ = -1, μ = -1/2
We also need to check the boundary points where either x + y + z = 6 or y² + z² = 4. These points are (0, 2, 2), (0, -2, -2), (4, 1, 1), and (4, -1, -1). We evaluate f at these points and compare them to the values we get from the Lagrange multipliers.
f(-1, 2, 3) = 7, f(3, -2, -1) = -1
f(0, 2, 2) = 4, f(0, -2, -2) = -4
f(4, 1, 1) = 6, f(4, -1, -1) = 2
So the maximum value of f subject to both constraints is 7, which occurs at (-1, 2, 3), and the minimum value of f subject to both constraints is -4, which occurs at (0, -2, -2).
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Marcus is taking part in a charity run. He has received $250 in fixed pledges, and he will receive $25 more in pledges for each mile he runs. Write an equation for the amount of money P Marcus will earn in terms of the distance d he runs, measured in miles
Answers
Answer:
250+25d= P
Step-by-step explanation:
How to say it aloud: "$250 plus 25 times miles ran is equal to total amount earned"
250 is a fixed amount that is apart of the equation. In order to get a correct total at the end, $250 must be added to 25d.
25d stands for $25 times the amount of miles ran, which according to the word problem is represented by d. The reason we multiply 25 times d is because Marcus is getting $25 for every mile he runs. At the end of his run, we need to multiply $25 by those miles.
The reason everything equals P is because according to the word problem, P is the amount of money earned.
I hope that makes sense.
Which equations have the same value of x as 3/5 (30 x minus 15) = 72? Select three options.
A. 18 x - 15 = 72
B. 50 x -25 = 72
C. 18 x - 9 = 72
D. 3 (6 x - 3) = 72
E. x = 4.5
Answers
The equations that have the same value of x as 3/5 (30 x - 15) = 72 are C, D, and E.
Choosing the equations that are equivalentTo solve for x in 3/5 (30 x - 15) = 72, we can first simplify the left side by distributing the 3/5:
3/5 (30 x - 15) = 18 x - 9
Now we can solve for x by setting the right side equal to 72:
18 x - 9 = 72
Adding 9 to both sides:
18 x = 81
Dividing by 18:
x = 4.5
So we know that option E is one of the correct answers.
To check which of the other options have the same value of x, we can substitute x = 4.5 into each equation and see if it simplifies to 72:
A. 18 x - 15 = 72
18(4.5) - 15 = 72
81 - 15 = 72 (not equivalent)
B. 50 x - 25 = 72
50(4.5) - 25 = 200 - 25 = 175 (not equivalent)
C. 18 x - 9 = 72
18(4.5) - 9 = 72 (equivalent)
D. 3 (6 x - 3) = 72
3(6(4.5) - 3) = 3(24) = 72 (equivalent)
Therefore, the equations that have the same value of x as 3/5 (30 x - 15) = 72 are C, D, and E.
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The area of the triangle below is \frac{2}{25}
25
2
square feet. What is the length of the base? Express your answer as a fraction in simplest form.
1/5 f
Answers
The length of the base of the given triangle can be simplified as 2√2/5 feet, which is equivalent to √8/5 feet.
What is the length of the base of a triangle if its area is (2/25) * 252 square feet and the height is twice the length of the base?We are given that the area of the triangle is (2/25) * 252 square feet.
Let the length of the base be x. Then, the height of the triangle can be expressed as (2/5)x, since the base divides the triangle into two equal parts.
The area of the triangle is given by the formula A = (1/2)bh, where b is the length of the base and h is the height of the triangle.
Substituting the given values, we get:
(1/2)x(2/5)x = (2/25)*252
Simplifying this equation, we get:
(1/5)x²= 20.16
Multiplying both sides by 5, we get:
x² = 100.8
Taking the square root of both sides, we get:
x =√(100.8)
Simplifying this expression, we get:
x = √(25*4.032)x = 5*√(4.032)x = (5/5)*√(4.032)x = 1*√(4.032)Therefore, the length of the base is √(4.032) feet, which can be expressed as a fraction in simplest form as 2√(2)/5 feet.
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Translate the following statement into a mathematical equation:
Five times a number, minus three, is twelve.
Answers
Its translation is 5×3-3=12
Suppose that scores on a knowledge test are normally distributed with a mean of 60 and a standard deviation of 3. 4. Scores on an aptitude test are normally distributed with a mean of 110 and a standard deviation of 6. 8. Boris scored a 55 on the knowledge test and 106 on the aptitude test. Callie scored 67 on the knowledge test and 119 on the aptitude test. (a) Which test did Boris perform better on? Use z-scores to support your answer. (b) Which test did Callie perform better on? Use z-scores to support your answer. (c) Boris also took a logic test. His z-score on that test was -0. 43. Does this change the answer to which test Boris performed better on? Explain your answer using z-scores
Answers
(a) Boris performed better on the aptitude test, since its z-score was higher.
(b) Callie performed better on the knowledge test.
(c) The z-score for the aptitude test was still higher than the z-score for the knowledge test, so Boris performed better on the aptitude test.
(a) To determine which test Boris performed better on, we need to compare his z-scores for the knowledge test and the aptitude test.
For the knowledge test, his z-score is calculated as:
z = (55 - 60) / 3 = -1.67
For the aptitude test, his z-score is:
z = (106 - 110) / 6.8 = -0.59
Since the z-score for the aptitude test is higher than the z-score for the knowledge test, Boris performed better on the aptitude test.
(b) To determine which test Callie performed better on, we need to compare her z-scores for the knowledge test and the aptitude test.
For the knowledge test, her z-score is:
z = (67 - 60) / 3 = 2.33
For the aptitude test, her z-score is:
z = (119 - 110) / 6.8 = 1.32
Since the z-score for the knowledge test is higher than the z-score for the aptitude test, Callie performed better on the knowledge test.
(c) Boris' z-score on the logic test (-0.43) is unrelated to his performance on the knowledge and aptitude tests, so it does not change the answer to which test he performed better on. The z-score for the aptitude test was still higher than the z-score for the knowledge test, so Boris performed better on the aptitude test.
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Which function is a parabola?
F(x)=5-x^2
X - 2 -1 -0 0 3
G(x) 3 0 -1 0 3
1. F(x) only
2. G(x) only
3. Both f(x) and g(x)
4.neither
Answers
The function G(x) is not a parabola because it does not have a quadratic term (x^2). Instead, it appears to be a piecewise linear function with three line segments.
Therefore, the answer is 1. F(x) only.
Answer:
1. F(x) only-----------------------
F(x) is in the format of a quadratic function:
y = ax² + bx + c, with a = - 1, b = 0, c = 5Hence it is a parabola.
The table represents a relation with two x-intercepts and two y-intercepts (points with the coordinate of 0).
We know that parabola can have maximum of one y-intercept, hence G(x) is not a parabola.
The matching answer choice is the first one.
En un almacén hay tres cajas de productos. La primera contiene 20 productos, de los cuales 3 son defectuosos, en la segunda hay 16 productos, con 2 defectuosos, y en la tercera caja hay 10 productos, sin productos defectuosos ¿Cuál es la probabilidad de sacar un producto defectuoso al azar?
Answers
La probabilidad de sacar un producto defectuoso al azar de las tres cajas es aproximadamente 0.0917, o un 9.17%.
La probabilidad de sacar un producto defectuoso al azar de las tres cajas se puede calcular utilizando la fórmula de la probabilidad.
Primero, calculemos la probabilidad de sacar un producto defectuoso de cada caja:
1. En la primera caja, hay 3 productos defectuosos entre 20 productos en total. La probabilidad es 3/20.
2. En la segunda caja, hay 2 productos defectuosos entre 16 productos en total. La probabilidad es 2/16.
3. En la tercera caja, no hay productos defectuosos entre 10 productos en total. La probabilidad es 0/10.
Para encontrar la probabilidad total, sumamos las probabilidades de cada caja y luego dividimos por el número total de cajas:
(3/20 + 2/16 + 0/10) / 3 ≈ (0.15 + 0.125 + 0) / 3 ≈ 0.0917
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CAN SOMEONE SHOW ME STEP BY STEP ON HOW TO DO THIS SOMEONE GAVE ME THE WRONG STEPS
A city just opened a new playground for children in the community. An image of the land that the playground is on is shown.
A polygon with a horizontal top side labeled 45 yards. The left vertical side is 20 yards. There is a dashed vertical line segment drawn from the right vertex of the top to the bottom right vertex. There is a dashed horizontal line from the bottom left vertex to the dashed vertical, leaving the length from that intersection to the bottom right vertex as 10 yards. There is another dashed horizontal line that comes from the vertex on the right that intersects the vertical dashed line, and it is labeled 12 yards.
What is the area of the playground?
900 square yards
855 square yards
1,710 square yards
1,305 square yards
Answers
The area of the playground include the following: 900 square yards.
How to calculate the area of a regular polygon?In Mathematics and Geometry, the area of a regular polygon can be calculated by using this formula:
Area = (n × s × a)/2
Where:
n is the number of sides.s is the side length.a is the apothem.In Mathematics and Geometry, the area of a parallelogram can be calculated by using the following formula:
Area of a parallelogram, A = base area × height
Area of playground, A = 45 × 20
Area of a playground, A = 900 square yards.
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π8
radians is the same as
degrees.
Answers
Answer:
π/8 radians is the same as 22.5°
Step-by-step explanation
π corresponds to 180 degrees.
so
180 : 8 = 22.5°
A student imagined one number. 2 is written to the right side of the number and 14 is added to the obtained number. 3 is written to the right side of the obtained number and 52 is added to the newly obtained number. The result of dividing the final number by 60 is the quotient that is for 6 greater than the initial number and the remainder is a two-digit number with both digits the same as the initial number. Find the initial number
Answers
The initial number is approximately 7.33.
Let's call the initial number "x".
According to the problem, the first step is to write 2 to the right of the number: this gives us the number 10x + 2.
-The next step is to add 14 to this number, which gives us:
10x + 2 + 14 = 10x + 16
-Then we write 3 to the right of this number, giving:
100x + 16 + 3 = 100x + 19
-And finally, we add 52 to this number:
100x + 19 + 52 = 100x + 71
Dividing this final number by 60 gives a quotient that is 6 greater than the initial number and a remainder that is a two-digit number with both digits the same as the initial number.
-So we have the equation:
(100x + 71) ÷ 60 = x + 6 + 0.01x
-We want to solve for x, so we first multiply both sides by 60:
100x + 71 = 60(x + 6 + 0.01x)
-Simplifying the right-hand side:
100x + 71 = 60x + 360 + 0.6x
Combining like terms:
39.4x =289
Dividing both sides by 39.4:
x =7.33
Therefore, the initial number is approximately 7.33.
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 Solve for the value of p
Answers
Answer:
p = 38
Step-by-step explanation:
We Know
The 104° angle + (2p) angle must be equal to 180°.
Solve for the value of p.
Let's solve
104° + 2p = 180°
2p = 76°
p = 38
The height in meters of a projectile can be modeled by h = -4. 9t^2 + vt + s where t is the time (in seconds) the
object has been in the air, v is the initial velocity
(in meters per seconds) and s is the initial height (in meters). A
soccer ball is kicked upward from the ground and flies through the air with an initial vertical velocity of 4. 9
meters per second. Approximately, after how many seconds does it land?
Answers
The soccer ball will land approximately 1 seconds after it was kicked upward. This is found by setting the height equation to 0 and solving for t using the quadratic formula.
To solve for the time the soccer ball lands, we need to find the time when h = 0. We can use the given equation
h = -4.9t² + vt + s
where v = 4.9 m/s (since it's kicked upward) and s = 0 (since it starts at ground level).
Substituting those values, we get
0 = -4.9t² + 4.9t
Factoring out 4.9t, we get
0 = 4.9t(-t + 1)
So, either t = 0 or -t + 1 = 0
Since time cannot be negative, we discard the second solution and solve for t
-t + 1 = 0
t = 1
Therefore, the soccer ball lands after approximately 1 second.
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7. AFIG has vertices at F(2, 4), I(5, 4) and G(3, 2). Graph AFIG and AP'I'G' after a rotation of 90° clockwise about the origin.
Answers
Thus, the coordinates of ΔF'I'G' after a rotation of 90° clockwise about the origin. are - F'(4,-2), I'(4,-5) and G'(2,-3).
Explain about the rotation rules:A rotation is a turn made about a specific axis. Both clockwise and anticlockwise rotations are possible. Whereas the image is really the rotating image, the pre-image is the original item.
From the pre-image point, calculate the image. The listed pre-image point is (x , y). Change the x and y coordinates, then multiply this same previous y coordinate by -1 to get a 90 degree anticlockwise rotation. Use the guidelines mentioned below to calculate each rotation.
Clockwise :
90 degree rotation: (x , y) ----> (y , -x)180 degree rotation: (x , y) ----> (-x , -y)270 degree rotation: (x , y) ----> (-y , x)Given :
F(2, 4), I(5, 4) and G(3, 2)
After 90 degree rotation: (x , y) ----> (y , -x)
F'(4,-2), I'(4,-5) and G'(2,-3).
Thus, the coordinates of ΔF'I'G' after a rotation of 90° clockwise about the origin. are - F'(4,-2), I'(4,-5) and G'(2,-3).
Graphs for the both triangles are obtained.
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Correct question:
ΔFIG has vertices at F(2, 4), I(5, 4) and G(3, 2). Graph ΔFIG and ΔF'I'G' after a rotation of 90° clockwise about the origin.
Solve each system by substitution
Y=-7x-24
Y=-2x-4
Answers
Answer:
(- 4, 4 )
Step-by-step explanation:
y = - 7x - 24 → (1)
y = - 2x - 4 → (2)
substitute y = - 2x - 4 into (1)
- 2x - 4 = - 7x - 24 ( add 7x to both sides )
5x - 4 = - 24 ( add 4 to both sides )
5x = - 20 ( divide both sides by 5 )
x = - 4
substitute x = - 4 into either of the 2 equations and evaluate for y
substituting into (1)
y = - 7(- 4) - 24 = 28 - 24 = 4
solution is (- 4, 4 )
PLEASE HELP I NEED IT QUICK!!!
Answers
Answer:
Step-by-step explanation:
There are 26 letters in the alphabet and 10 digits that you can use (0,1,2,3,4,5,6,7,8,9)
As a result, we can find the number of combinations by doing the following:
26 x 26 x 10 x 10 x 10
since the first two symbols are alphabets and the last three are digits. After doing the math you get
26 x 26 x 10 x 10 x 10 = 676000 => You can make a total of 676,000 PIN codes
Can you find the domain and range and type the correct code? help me please.
Answers
The graphs are identified as follows
1. the domain is option G
2. the range is option E
3. the domain is option D
4. the range is option C
What is domain and range in coordinate geometryIn coordinate geometry, the domain and range are concepts used to describe the set of possible inputs (x-values) and outputs (y-values) of a function, respectively.
The domain of a function is the set of all possible x-values for which the function is defined. In other words, it is the set of all values that can be plugged into the function and produce a meaningful output.
The range of a function is the set of all possible y-values that the function can take on as x varies over its domain. In other words, it is the set of all values that the function can output.
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The length of a rectangle is 4 m more than the width. if the area of the rectangle is 77 m2. how many meters long is the width of the rectangle?
answer choices d: -11 m: 7 z: 9
Answers
The width of the rectangle is approximately 5.39 meters.
Let's denote the width of the rectangle by x. According to the problem, the length of the rectangle is 4 meters more than the width, which means that the length can be represented as x+4.
The formula for the area of a rectangle is A = length x width. In this case, we know that the area of the rectangle is 77 square meters, so we can set up the following equation:
77 = (x+4)x
Expanding the brackets, we get:
77 = x² + 4x
Rearranging this equation into standard quadratic form, we get:
x² + 4x - 77 = 0
To solve for x, we can use the quadratic formula:
[tex]x = \frac{(-b ± sqrt(b^2 - 4ac))}{ 2a}[/tex]
Plugging in the values for a, b, and c, we get:
[tex]x = \frac{(-4 ± sqrt(4^2 - 4(1)(-77)))}{ 2(1)}[/tex]
Simplifying this expression, we get:
[tex]x = \frac{(-4 ± sqrt(336)} { 2}[/tex]
[tex]x = \frac{(-4 ± 4sqrt(21))}{ 2}[/tex]
x = -2 ± 2[tex]\sqrt{(21)}[/tex]
Since the width of a rectangle cannot be negative, we discard the negative solution and get:
x = -2 ± 2[tex]\sqrt{(21)}[/tex]
Therefore, the width of the rectangle is approximately 5.39 meters (rounded to two decimal places).
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In ΔUVW, the measure of ∠W=90°, UV = 4. 7 feet, and WU = 2. 2 feet. Find the measure of ∠U to the nearest degree
Answers
The measure of angle U in triangle UVW is approximately 28 degrees. This is found by using the inverse tangent function to solve for angle U given the lengths of two sides and the fact that angle W is a right angle.
To find the measure of ∠U in ΔUVW, we can use trigonometry. We know that sin(∠U) = opposite/hypotenuse, which is equal to UW/VW. Therefore, we can plug in the given values and solve for sin(∠U)
sin(∠U) = UW/VW = 2.2/4.7 = 0.4681
Next, we can use the inverse sine function (sin⁻¹) to find the measure of ∠U
∠U = sin⁻¹(0.4681) = 28.34 degrees (rounded to the nearest degree)
Therefore, the measure of ∠U in ΔUVW is approximately 28 degrees.
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The linear density of a rod of length 9 m is given by p(a) - 3+2017 - measured in kilograms per meter, where is measured in meters from one end of the rod. Find the total mass of the rod. Total mass = kg
Answers
The total mass of the rod is 81622.5 kg. To find the total mass of the rod, you need to integrate the linear density function with respect to the length of the rod.
To find the total mass of the rod, we need to integrate the linear density function over the entire length of the rod.
Let's start by finding the linear density function at the end of the rod, which is a = 9:
p(9) = 3 + 2017 = 2020 kg/m
Now we can integrate the linear density function from a = 0 to a = 9 to find the total mass:
m = ∫₀⁹ p(a) da
m = ∫₀⁹ (3 + 2017a) da
m = [3a + 1008.5a²] from 0 to 9
m = (3(9) + 1008.5(9)²) - (3(0) + 1008.5(0)²)
m = 81622.5 kg
Therefore, the total mass of the rod is 81622.5 kg.
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The restaurant decides to add another choice for the entrée and another choice for a side on the children’s menu the additional entrée choice is grilled cheese and the additional side choice is mixed vegetables what is the probability that a child with cheese pizza or spaghetti with mixed vegetables for his or her meal?
Answers
The sample space for a child choosing one entrée and one side is A) BA, BF, CA, CF, PA, PF, SA, SF.So, the correct answer is A). Probability of a child choosing pizza or spaghetti with mixed vegetables is 2/15 or 0.1333 (rounded to four decimal places) or approximately 13.33%.
The sample space represents choose of one entrée and one side for his or her meal is BA, BF, CA, CF, PA, PF, SA, SF. So, the correct option is A).
After the addition of grilled cheese as an entrée choice and mixed vegetables as a side choice, there are now five entrée choices (B, C, P, S, G) and three side choices (A, F, MV). The total number of possible meal combinations is 5*3 = 15.
The number of meal combinations where the child chooses pizza or spaghetti with mixed vegetables is 2 (pizza with mixed vegetables and spaghetti with mixed vegetables). Therefore, the probability of choosing spaghetti or pizza with mixed vegetables for her or his meal is
P(pizza or spaghetti with mixed vegetables) = 2/15 = 0.1333 (rounded to four decimal places) or approximately 13.33%.
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--The given question is incomplete, the complete question is given
"At a restaurant, a children's meal gives a choice of four entrées: burger (B), chicken (C), pizza (P), or spaghetti (S), and two sides: apple (A) or fries (F).
Part A
Which sample space represents all the ways a child could choose one entrée and one side for his or her meal?
A) BA, BF, CA, CF, PA, PF, SA, SF
B) BA, CA, PA, SA
C) BF, CF, PF, SF
D) B, C, P, S, A, F
Part B
The restaurant decides to add another choice for the entrée and another choice for the side on the children's menu. The additional entrée choice is grilled cheese and the additional side choice is mixed vegetables. What is the probability that a child will choose pizza or spaghetti with mixed vegetables for his or her meal?"--
Complete the table by finding the balance a when p dollars is invested at rater for t years and compounded n times per year. (round your answer to the nearest cent.)
p = $3000, r = 4%, t = 20 years
1 2 4 12 365 continuous
Answers
The balance when $3000 is invested at 4% rate for 20 years and compounded annually, semi-annually, quarterly, monthly, daily, and continuously are $6,372.76, $6,454.81, $6,506.71, $6,535.94, $6,546.49, and $6,549.18 respectively.
How to calculate compound interest?Compounding Frequency Balance after 20 Years
Annually $6,372.76
Semi-annually $6,454.81
Quarterly $6,506.71
Monthly $6,535.94
Daily $6,546.49
Continuous $6,549.18
Using the formula for compound interest:
A = P(1 + r/n)^(nt)
where A is the balance after t years, P is the principal (amount invested), r is the annual interest rate, n is the number of times the interest is compounded per year, and t is the number of years.
For p = $3000, r = 4%, t = 20 years, and the different compounding frequencies, we get:
Annually: A = $3000(1 + 0.04/1)^(1*20) = $6,372.76
Semi-annually: A = $3000(1 + 0.04/2)^(2*20) = $6,454.81
Quarterly: A = $3000(1 + 0.04/4)^(4*20) = $6,506.71
Monthly: A = $3000(1 + 0.04/12)^(12*20) = $6,535.94
Daily: A = $3000(1 + 0.04/365)^(365*20) = $6,546.49
Continuous: A = $3000e^(0.0420) = $6,549.18 (where e is the constant 2.71828...)
Therefore, the balance a when $3000 is invested at 4% rate for 20 years and compounded n times per year (where n is the different frequencies given) are as mentioned above.
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On the day their son peter was born, madeline and ben invested $1500 for his education at 6.7% interest, compounded quarterly. today it’s peters birthday. he is 19 years old and wants to go to college
Answers
Based on the information provided, Madeline and Ben invested $1500 for their son Peter's education on the day he was born at an interest rate of 6.7% compounded quarterly. Since Peter is now 19 years old and wants to go to college, we can calculate the current value of his education fund.
To do this, we can use the formula for compound interest:
A = P(1 + r/n)^(nt)
Where:
A = the final amount
P = the principal (initial investment)
r = the annual interest rate (as a decimal)
n = the number of times the interest is compounded per year
t = the time in years
In this case, we have:
P = $1500
r = 6.7% = 0.067 (as a decimal)
n = 4 (since the interest is compounded quarterly)
t = 19 (since Peter is now 19 years old)
So, the current value of Peter's education fund is:
A = $1500(1 + 0.067/4)^(4*19)
A = $1500(1.01675)^76
A = $1500(2.4826)
A = $3,723.90
Therefore, the current value of Peter's education fund is $3,723.90. This should help Madeline and Ben determine how much more they need to save for Peter's college expenses.
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The function f(x)=3^x-3 is an exponential function containing the points (0,-2) and (2,6).
the function g(x)=-1/2f(x)+3 containing points ____
a. (0,2)
b. (0,4)
c. (-2,3)
d. (-2,2)
and ____
a. (2,0)
b. (2,6)
c. (6,2)
d. (6,6)
Answers
The function g(x)=-1/2f(x)+3 containing points (a) (0, 4) and (a) (2, 0).
The function g(x) = -1/2f(x) + 3 is obtained by applying certain transformations to the original function f(x) = 3^x - 3.
To find the points on the graph of g(x), we need to substitute the x-values from the given points into the function g(x) and determine the corresponding y-values.
Given:
Original function f(x) = 3^x - 3
Points on f(x): (0, -2) and (2, 6)
To find the points for g(x), we substitute the x-values into g(x) = -1/2f(x) + 3:
1. For the point (0, -2):
g(0) = -1/2f(0) + 3
= -1/2(-2) + 3
= 1 + 3
= 4
2. For the point (2, 6):
g(2) = -1/2f(2) + 3
= -1/2(6) + 3
= -3 + 3
= 0
Therefore, the points for the function g(x) = -1/2f(x) + 3 are:
(a) (0, 4)
and
(a) (2, 0)
Hence, the correct answer is:
(a) (0, 4) and (a) (2, 0).
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A stratified random sample of 1000 college students in the united states is surveyed about how much money they spend on books per year
Answers
A random sample that has 1000 college students in the United States is surveyed about how much money they spend on books per year, and the mean amount calculated is 1000 college students in the US. Option A is the correct answer.
The sample in this scenario refers to the group of college students who were surveyed about their book spending habits. In this case, the sample size is 1000 college students in the United States.
The purpose of this survey is to estimate the mean amount of money spent on books per year by college students in the US, using the sample mean as an estimate. It is important to note that the sample should be representative of the larger population of college students in the US.
Therefore, option A, "1000 college students in the US," is the correct answer. Option B, "all college students in the US," represents the population, not the sample. Options C and D are not relevant to the given scenario.
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The question is -
A random sample of 1000 college students in the United States is surveyed about how much money they spend on books per year, and the mean amount is calculated. What is the sample?
a. 1000 college students in the US
b. all college students in the US
c. 1000 college students in CA
d. all college students in CA
The loudest animal on earth is the blue whale. blue whales can emit sound with an intensity of 106.8 watts/meter2. the equation relates the sound level, , in decibels (db), of a noise with an intensity of i to the smallest sound intensity that can be heard by the human ear, (approximately watts/meter2).based on this information, which value is closest to the sound level, in decibels, of the vocalizations of a blue whale?
Answers
The sound level of the vocalizations of a blue whale is approximately 140.28 decibels.
How to find sound level?The question asks us to find the sound level in decibels (db) of the vocalizations of a blue whale, given its sound intensity of 106.8 watts/meter2.
The formula for sound level in decibels is:
L = 10log(i/I0)
Where L is the sound level in decibels, i is the sound intensity in watts/meter2, and I0 is the smallest sound intensity that can be heard by the human ear (approximately 1x10⁻¹² watts/meter2).
Plugging in the given values, we get:
L = 10log(106.8/1x10⁻¹² )
Simplifying this expression, we get:
L = 10log(1.068x10¹⁴)
L = 10(14.028)
L = 140.28
Therefore, the sound level of the vocalizations of a blue whale is approximately 140.28 decibels.
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11. A town that uses 68 million BTUs of energy each month is using how many kilowatt-hours of
energy? (1 kWh-3400 BTUS)
Answers
Answer:
[tex]20,000 \text{ kWh}[/tex]
Step-by-step explanation:
We can convert 68 million British Thermal Units (BTUs) to kilowatt-hours (kWh) using the given conversion ratio:
[tex]\dfrac{1 \text{ kWh}}{3400 \text{ BTUs}}[/tex]
Multiplying by the ratio:
[tex]68,000,000 \text{ BTUs} \cdot \dfrac{1 \text{ kWh}}{3,400 \text{ BTUs}}[/tex]
↓ canceling the BTU units
[tex]68,000,000\cdot \dfrac{1 \text{ kWh}}{3,400}[/tex]
↓ executing multiplication
[tex]\dfrac{68,000,000}{3,400} \text{ kWh}[/tex]
↓ rewriting as a decimal
[tex]\boxed{20,000 \text{ kWh}}[/tex]