Answer:
gradient= -3
Step-by-step explanation:
Whenever you're calculating a gradient, you use the formula Δy÷Δx so in this case, the change in x will be 1 and the change in y will be -3 as it goes down to meet the line and not up so -3÷1= -3
∴ the gradient(m) = -3
Hope this helps.
(a) Find a nonzero vector orthogonal to the plane through the points P, Q, and R, and (b) find the area of triangle PQR.P(1, 0, 1), Q(-2, 1, 3), R(4, 2, 5)
The vector orthogonal to the plane through the points P, Q, and R is (8, -8, 12), and the area of triangle PQR is \($\sqrt{301}$\).
For part (a), we can find a nonzero vector orthogonal to the plane through the points P, Q, and R by constructing a normal vector to the plane using the cross product of two vectors in the plane. The two vectors in the plane are \($\vec{PQ} = (1- (-2), 0-1, 1-3) = (3, -1, -2)$\) and \($\vec{PR} = (1-4, 0-2, 1-5) = (-3, -2, -4)$\). Taking the cross product of the two vectors gives us the normal vector to the plane, \($\vec{n} = \vec{PQ} \times \vec{PR} = (8, -8, 12)$\). Therefore, the vector orthogonal to the plane is \($\vec{n} = (8, -8, 12)$.\)
For part (b), the area of triangle PQR can be found using the formula for Heron's Formula, which states that the area of a triangle with sides a, b,and c is given by
\($A = \sqrt{s(s-a)(s-b)(s-c)}$\)
where \($s = \frac{a+b+c}{2}$\) . In this case, the sides are \($a = \|\vec{PQ}\| = \sqrt{3^2 + (-1)^2 + (-2)^2} = \sqrt{14}$, $b = \|\vec{QR}\| = \sqrt{(-2-4)^2 + (1-2)^2 + (3-5)^2} = \sqrt{14}$\), and\($c = \|\vec{PR}\| = \sqrt{(-3)^2 + (-2)^2 + (-4)^2} = \sqrt{29}$\). Plugging these values into the formula, we get
\(= \sqrt{s(s-a)(s-b)(s-c)} = \sqrt{\frac{7(7-\sqrt{14})(7-\sqrt{14})(7-\sqrt{29})}{4}} = \sqrt{7(7-\sqrt{14})^2(7-\sqrt{29})} = \sqrt{7(7-\sqrt{14})^2(\sqrt{14}+\sqrt{29})} = \sqrt{7(7-\sqrt{14})^2\sqrt{43}} = \sqrt{301}$\)Therefore, the area of triangle PQR is \($\sqrt{301}$\)
The vector orthogonal to the plane through the points P, Q, and R is (8, -8, 12), and the area of triangle PQR is \($\sqrt{301}$\).
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1y
Which intervals show f(x) decreasing? Check all that
apply.
4
-3 -2 -1
3
[-2.5, -2]
(-2,-1.5)
0 (-1, 1)
[1.5, 2]
[2, 2.5)
(2.5, 3]
4
-8
12
-16
I don't have gotten any answer of this question
Is 5y + 27 factorable or prime
explain
Answer:
Prime
Step-by-step explanation:
As there is no common between 5y and 7 except 1 as factor.Hence its not factorableAn employee group requires 7 people be chosen for a committee from a group of 16 employees. Determine the following probabilities of randomly drawn committee of 7 employees. Write your answers as percents rounded to 4 decimal places. The employee group has 6 women and 10 men. What is the probability that 3 of the people chosen for the committee are women and 4 people chosen for the committee are men? % The committee requires that exactly 3 people from Customer Service serve on the committee. There are 5 people in Customer Service. What is the probability that exactly 3 of the people chosen for the committee are from Customer Service? % A bag contains 7 red marbles, 6 white marbles, and 5 blue marbles. You draw 4 marbles out at random, without replacement. Find each probability. P( all 4 are red )= A poker hand consists of five cards randomly dealt from a standard deck of 52 cards. The order of the cards does not matter. Determine the following probabilities for a 5-card poker hand. Write your answers in percent form, rounded to 4 decimal places. Determine the probability that exactly 4 of these cards are Aces. Answer: of ___% Determine the probability that all five of these cards are Spades. Answer: 08% Determine the probability that exactly 4 of these cards are face cards. Answer: ____% Determine the probability of selecting exactly 2 Aces and exactly 2 Kings Answer: ___% Determine the probability of selecting exactly 1 Jack. Answer: ___%
Answer:
\(1.)\\\frac{{6\choose3}*{10\choose4}}{{16\choose7}}= 36.7133\\2.)\\\frac{{5\choose3}*{11\choose4}}{{16\choose7}}= 28.8462\\3.)\\\frac{{7\choose4}}{{18\choose4}}= 1.1438\\4.)\\\frac{{4\choose4}*{48\choose1}}{{52\choose5}}= .0018\\5.)\\\frac{{13\choose5}}{{52\choose5}} = .0495\\6.)\\\frac{{12\choose4}*{40\choose1}}{{52\choose5}}= .7618\\7.)\\\frac{{4\choose2}*{4\choose2}*{44\choose1}}{{52\choose5}}= .0609\\8.)\\\frac{{4\choose1}*{48\choose4}}{{52\choose5}}= .2995\)
all numbers were intended to % attached at the end, i just don't know how to do it.
please help asap please
Answer:
take away 8 from 14 then see if the answer works for x by doing 28 - that answer
Step-by-step explanation:
Make w the subject of aw-x=3w+2
Answer:
w = x+2/a−3
Step-by-step explanation:
Let's solve for w
aw−x=3w+2
Step 1: Add -3w to both sides
aw−x+−3w=3w+2+−3w
aw−3w−x=2
Step 2: Add x to both sides
aw−3w−x+x=2+x
aw−3w=x+2
Step 3: Factor out variable w
w(a−3)=x+2
Step 4: Divide both sides by a-3
w(a−3)/a−3 = x+2/a−3
w = x+2/a−3
The value of w is (2+x)/ (a-3).
What is Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides. LHS = RHS is a common mathematical formula.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given:
aw-x=3w+2
Now, solving for w
aw - 3w = 2 + x
w(a-3 )= 2+x
w= (2+x)/ (a-3).
Hence, the value of w is (2+x)/ (a-3).
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the ratio of dividends to the average number of common shares outstanding is:
The ratio of dividends to the average number of common shares outstanding is known as the dividend yield. It is a measure of the return on an investment in the form of dividends received relative to the number of shares held.
To calculate the dividend yield, you need to divide the annual dividends per share by the average number of common shares outstanding during a specific period. The annual dividends per share can be obtained by dividing the total dividends paid by the number of outstanding shares. The average number of common shares outstanding can be calculated by adding the beginning and ending shares outstanding and dividing by 2.
For example, let's say a company paid total dividends of $10,000 and had 1,000 common shares outstanding at the beginning of the year and 1,500 shares at the end. The average number of common shares outstanding would be (1,000 + 1,500) / 2 = 1,250. If the annual dividends per share is $2, the dividend yield would be $2 / 1,250 = 0.0016 or 0.16%.
In summary, the ratio of dividends to the average number of common shares outstanding is the dividend yield, which measures the return on an investment in terms of dividends received per share held.
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Alan and betty collected cans for recycling. Alan collected 154 cans. Betty collected 215 cans. How many cans did they collect?
Answer:
369 cans
Step-by-step explanation:
Add the two numbers of cans collected by each:
Alan: 154 cans
Betty: 215 cans
Total: 369 cans
About how many times greater was change in price per gallon in 2007 than 2000? Show your work or explain how u determind your answer.
The required, in 2007 the price per gallon was 7b more than the price of a gallon of fuel in the year 2000. Where b is the inflation factor.
What is simplification?The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Here,
Let 'a' be the cost per gallon of fuel in the year 2000, and 'b' be the inflation rate per year. If the rate of inflation is constant then
After 7 year inflation = 7b
Cost of fuel in 2007 = a + 7b
Now,
according to the question
Change in cost of fuel
= cost in 2007 - cost in 2000
= a + 7b - a
= 7b
Thus, the required, in 2007 the price per gallon was 7b more than the price of a gallon of fuel in the year 2000. Where b is the inflation factor.
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extrapolation is the use of the regression line to estimate a mean of y-values for an x-value that is far outside the x-range of data.
Extrapolation is the use of the regression line to estimate a mean of y-values for an x-value that is far outside the x-range of data.
What is extrapolation?
A statistical technique called extrapolation aims to understand the unknown data from the known data. It uses historical data to attempt to predict future data. For instance, using the current population size and growth rate to project the size of a population in a few years.
Predicting hypothetical values outside of a specific data set is the goal of extrapolation.
Contrary to interpolation, which typically focuses on estimating past values, extrapolation is used to predict unknown future values due to its predictive nature.
Hence, extrapolation is the use of the regression line to estimate a mean of y-values for an x-value that is far outside the x-range of data.
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Sherman counted up all his hockey player
cards and realized he had 100. He recently
purchased a book to organize them that
holds 5 cards on a page. If he puts 5 pages
in a section, how many sections will be have
in his book?
Answer:
4
Step-by-step explanation:
because 5 times 5 is 25 which 25 is how many cards fit in one section so 100-25=75 and so you could say that 100 divided by 25 is 4 so he will need 4 sections hope you find this helpful! :D
A receipt is _______________.
A.
A book for recording transactions
B.
A record of a product that hasn’t been paid for
C.
A record of a transaction that already happened
D.
A method of issuing invoices
Answer:
A receipt is a record of a transaction that apready happened.
What is the inverse of {(2, 4), (-3, 5), (7, -1), (9, 0)}?
Answer:
(4,2),(5,−3),(−1,7),(0,9)
Step-by-step explanation:
Find the equation of the line that passes through the point (3,7) and is parallel to the line that passes through (5,5) and (5,3). Plot on the plane.
Answer:
this is correct answer
Step-by-step explanation:
you supports to write this
Question 2 (4x) Determine the values in the given diagram X = y =
The values of x and y in the triangle are x = 100 degrees and y = 50 degrees
How to determine the values of x and y?The possible figure that completes the question is added as an attachment
From the figure, we have the following properties
The above highlights mean that
Angle y = 50
Rewrite as
y = 50
Also by the opposite external angle theorem, we have
x= y + 50
This gives
x = 50 + 50
Evaluate
x = 100
Hence, the angles are x = 100 degrees and y = 50 degrees
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a statistics instructor collects the gpa and major of each student in a statistics class. major is which level of measurement?
The major variable in this statistics class is considered a nominal variable.
The major variable is considered a nominal level of measurement because it represents a categorical characteristic that cannot be ordered or measured in a quantitative manner.
In other words, the values assigned to different majors (e.g. Engineering, English, History) do not represent numerical quantities or differences.
The level of measurement of a variable determines the type of statistical analyses that can be conducted with that variable. In this case, the major variable is considered a nominal variable because it represents a categorical characteristic that cannot be ordered or measured in a quantitative manner.
Nominal variables are often used to categorize or group data based on non-numeric characteristics, such as gender, race, or occupation. By collecting data on both GPA and major, the statistics instructor can explore relationships between these variables, such as whether certain majors tend to have higher or lower GPAs.
In conclusion, the major variable in this statistics class is considered a nominal variable.
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Twelve Divided by the sum of a number and five
Why is the property of closure important in math?
Understanding a set’s nature or properties is made easier by its closure property
What is the Closure Property?The set is closed if it has the closure property. This means that any operation performed on an element within a set will provide a result that belongs to that element’s set.
Why Closure Property is important?
Understanding a set’s nature or properties is made easier by its closure property. Mathematical applications of closure are numerous. Any operation that adheres to this condition is said to be “closed” or to have “fulfilled the operation’s closure property.”
Example – The set of even number is closed under subtraction
Even – Even = Even
6 – 4 = 2
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Is (5, 0) a solution to the equation y = x + 5?
Guys I need help
Answer:
no
Step-by-step explanation:
substitute the x- coordinate 5 into the equation and if the result is equal to the y- coordinate 0 then it is a solution
y = 5 + 5 = 10 ≠ 0
Then (5, 0 ) is not a solution to the equation
The UAE Hope Probe is between 22,000 Km and 44,000 KM away from mars. This means its between _____________m and ______________m. PLease reply in 2 min and SHOW UR WORK :)
Answer:
This means it is between 22000000 m and 44000000 m.
Step-by-step explanation:
From the question, the UAE Hope Pobe is between 22 000 km and 44 000 km away from Mars.
Since,
1 000 m = 1 km
Then,
22 000 km = 22 000 x 1000 m
= 22000000 m
also,
44000 km = 44000 x 1000 m
= 44000000 m
Therefore, the Probe is between 22000000 m and 44000000 m.
What is the square of √ 1?
The square of given expression √1 ( square root of 1 ) is equal to 1.
As given in the question,
Given expression is equal to √1 ( square root of 1 )
To calculate the square of √1 we have,
Let us consider variable x is equal to √1
x = √1
Now take square on both the sides of the given expression we get,
x² = (√1 )²
⇒ x² = √1 × √1
Multiplying square root of 1 to square root of 1 is equal to 1 we get,
or use law of exponent :
√1 × √1 = \(1^{\frac{1}{2} + \frac{1}{2} }\)
= 1
⇒ x² = 1
Therefore, the square of the given expression √1 ( square root of 1 )is equal to 1.
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A plumber charges $55 for a service call plus $35 per hour. If the plumber’s bill was $160, how many hours was he there?
Calculate the concentration of a solution prepared by adding 15.00 mL of 2.07 x M from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation mark with distilled water
The concentration of the solution prepared by adding 15.00 mL of 2.07 M into a 50.00 mL volumetric flask and diluting to the mark is approximately 0.621 M.
To calculate the concentration of the solution, we can use the formula: C1V1 = C2V2. Where: C1 = initial concentration of the solution; V1 = initial volume of the solution ; C2 = final concentration of the solution; V2 = final volume of the solution. In this case: C1 = 2.07 M; V1 = 15.00 mL; C2 = ?; V2 = 50.00 mL. Plugging in the values into the formula, we have: (2.07 M)(15.00 mL) = C2(50.00 mL).
Now, solve for C2: C2 = (2.07 M)(15.00 mL) / (50.00 mL). C2 = 0.621 M. Therefore, the concentration of the solution prepared by adding 15.00 mL of 2.07 M into a 50.00 mL volumetric flask and diluting to the mark is approximately 0.621 M.
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What is the missing value? The Volume is 5120 m^3
Answer:
32
Step-by-step explanation:
V=\(\pi\)r^2
5120=\(\pi r^{2}\)x20
5120/20 = 256
\(\sqrt{256}\)=16
16+16 ( 16x2) = 32
32in.
What is the Answer??????
I tryed this 200 time i don't get it
(-7x+4)+(-5x-12)
Answer:
- 2x - 8
Step-by-step explanation:
\( - 7x + 4 - 5x - 12\)
Collect like terms
-7x - 5x +4 - 12
= -2x - 8
Dan Stocked up on batteries.
He Brought 10 packages of AA and AAA batteries for a total of 72 batteries.
The AA batteries are sold in packages of 6, and the AAA batteries are sold in packages of 8. Write a system of equations that can be solved to find how many packages of each type of battery Dan bought. Remember to define your variables.
1. C+D=10
2.6c+8D=72
Answer: C
Step-by-step explanation:
i just took a test
Answer:Answer:
x + y = 10
6x + 8y = 72
Step-by-step explanation:
Number of packages = 10
Total batteries = 72
For AA:
batteries per package = 6
Let number of packages = x
For AAA:
batteries per package = 8
Let number of packages = y
Number of AA packages + number of AAA packages = 10
Sum of AA + sum of AAA equals 72 batteries
x + y = 10
6x + 8y = 72
Step-by-step explanation:
If the production rate is 1,325 cookies per hour at a bakery, how many cookies will be produced in an 8 hour shift?
Answer:
10,600 cookies will be made in 8 hours
Step-by-step explanation:
1325 × 8 = 10,600
A -10 nC charge is located at (x, y) = (1.2 cm , 0 cm).
What is the x-component of the electric field at the position (x, y) = (−4.1cm, 0 cm)?Express your answer to two significant figures and include the appropriate units.
We can use Coulomb's law to calculate the magnitude of the electric field at a distance r away from a point charge Q:
E = k * Q / r^2
where k is Coulomb's constant, Q is the charge of the point charge, and r is the distance from the point charge.
In this problem, we have a point charge Q of -10 nC located at (1.2 cm, 0 cm), and we want to find the x-component of the electric field at a distance r = 5.3 cm away at position (-4.1 cm, 0 cm).
To find the x-component of the electric field, we need to use the cosine of the angle between the electric field vector and the x-axis, which is cos(180°) = -1.
So, the x-component of the electric field at position (-4.1 cm, 0 cm) is:
E_x = - E * cos(180°) = - (k * Q / r^2) * (-1)
where k = 9 x 10^9 N*m^2/C^2 is Coulomb's constant.
Substituting the given values, we get:
E_x = - (9 x 10^9 N*m^2/C^2) * (-10 x 10^-9 C) / (0.053 m)^2
E_x ≈ -30,566.04 N/C
Rounding this to two significant figures and including the appropriate units, we get:
The x-component of the electric field is about -3.1 x 10^4 N/C (to the left).
Find the probability of rolling a 4 or less on the first die, and a 5 or less on the second die
Answer:
first dice-4/6
second dice-5/6
Step-by-step explanation:
if you have six possible outcomes for the first dice and you want it to roll 1 thru 4 then you have a four out of six chance and you have a 5 out of six chance for the second dice
A TV costs £800 plus VAT at 20%.
What is the total cost of the TV?
Answer:
960 dollars
Step-by-step explanation:
Your welcome