(a) A nonzero vector orthogonal to the plane through the points P, Q, and R is (-14, 18, -12)
(b) The area of the triangle PQR is approximately 12.9 square units.
Understanding Vector(a) To find a nonzero vector orthogonal to the plane through the points P, Q, and R, we can use the cross product of two vectors that lie on the plane.
Let's consider the vectors formed by the points P, Q, and R:
Vector PQ = q - p
= (-2 - 1, 1 - 0, 3 - 1)
= (-3, 1, 2)
Vector PR = r - p
= (7 - 1, 2 - 0, 5 - 1)
= (6, 2, 4)
Now, we can calculate the cross product of these two vectors:
Vector n = PQ x PR
Using the formula for the cross product of two vectors:
n = (a2b3 - a3b2, a3b1 - a1b3, a1b2 - a2b1)
n = (-3 * 4 - 1 * 2, 1 * 6 - (-3 * 4), (-3 * 2) - (1 * 6))
= (-12 - 2, 6 - (-12), (-6) - 6)
= (-14, 18, -12)
So, a nonzero vector orthogonal to the plane through the points P, Q, and R is (-14, 18, -12).
(b) To find the area of the triangle PQR, we can use the magnitude of the cross product vector n as the area of the parallelogram formed by vectors PQ and PR. Then, we divide it by 2 to get the area of the triangle.
The magnitude of vector n can be calculated as:
|n| = √((-14)² + 18² + (-12)²)
= √(196 + 324 + 144)
= √(664)
≈ 25.8
The area of the triangle PQR is half of the magnitude of vector n:
Area = |n| / 2
≈ 25.8 / 2
≈ 12.9
Therefore, the area of the triangle PQR is approximately 12.9 square units.
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good evening! Can someone please answer this, ill give you brainliest and your earning 50 points. Would be very appreciated.
Answer:
Based on the linear regression equation, the intercept means that for 0 missed classes, the expected test score is 98✓we know that,
y intercept exist when x = 0
so,
⇢y = -4x +98
⇢y = -4 x 0 +98
⇢y = 98
so , the expected test score is 98
Based on the linear regression equation, the slope means that for every missed class, the expected tast score decreases by 4 points✓when x = 0
y = -4(0) +98
when x = 1
y= -4(1) +98 = 94
when x = 2
y= -4(2) +98 = 90
we can see the decresement of 4 points
Based on the linear regression equation, as the number of days a student misses class increases the expected test score decreases ✓We can see that the increament in absent days lead to lower scores ( one class = 4 points)
For 0 clases
y=-0+98=98Option A is certified as correct
Here slope is -4So it decreasing not increasing
Option C is correct
Yes as the missed classes increase expected test decreasing as slope is negative.
Option F is correct
i have 5 minuets please answer (image included)
Answer:
The second one !!
Step-by-step explanation:
You always start from the origin... (0, 0) !! From the bottom of that function, from the origin, you would move to the right 1, down 4 in order to get where the graph is in the picture !!
i hope this made sense... have a good day !
Franco read 3 over 8 of a chapter of his history book in 1 over 5 of an hour. At this rate, how many chapters of his history book can he read in 1 hour?.
Franco can read approximately 1.875 chapters of his history book in 1 hour, assuming his reading rate remains constant.
Franco read 3/8 of a chapter in 1/5 of an hour. To find out how many chapters he can read in 1 hour, we need to first determine his rate of reading.
To do this, we can set up a proportion:
3/8 of a chapter = x chapters
1/5 of an hour = 1 hour
Cross-multiplying, we get:
3/8 * 1 hour = x * 1/5
Simplifying:
3/8 = x/5
Cross-multiplying again:
15/8 = x
So Franco can read 15/8 or 1 7/8 chapters in 1 hour.
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HElp HElp HElp HELP HELP HELP
1. coefficient
2. constant
3. variable
4. equation
5. inequality
6. two - step
-- let me know if you have any questions regarding this.
Ahmed ell boxe of pen ($8) and rubber band ($4). Leona ordered a total of 30 carton for $220. How many boxe of pen did Leona order?
By applying the algebra concept, it can be concluded that Leona ordered 25 boxes of pens.
Algebra is a branch of mathematics that uses symbols and mathematical operations, such as addition, subtraction, multiplication, and division to solve problems.
We have this information:
The price of a box of pens = $8
The price of a box of rubber bands = $4
Total order = 30 boxes
Total payment = $220
Let p symbolize the number of pens and r symbolize the number of rubber bands. Now we have the following equations:
p + r = 30 ....................... (1)
8p + 4r = 220 ............... (2)
To find the value of p and r, we can do it by simplifying the first equation as follows:
p + r = 30
r = 30 - p
Then we can substitute this value into the second equation:
8p + 4r = 220
8p + 4(30 - p) = 220
8p + 120 - 4p = 220
4p = 220 - 120
= 100
p = 100/4
= 25 boxes of pens
So we can calculate the value of r as well:
r = 30 - p
= 30 - 25
= 5 boxes of rubber bands
Thus, it can be concluded that Leona ordered 25 boxes of pens.
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Write an integer to describe each situation:
The temperature is 15 degrees below zero
Answer:
-15
Step-by-step explanation:
An integer is a whole number from positive and negative (no decimal no fraction)
In this case 15 degrees below is -15
Are the ratios 2:1 and 9:5 equivalent?
Answer:
no
Step-by-step explanation:
if we put the ratios as fractions, we would get 2/1, or just 2, and 1 4/5. these are not equivalent, so the ratios are not equivalent either.
Answer:
No.
Step-by-step explanation:
2:1 has multiple equivalents, for example:
2:1
4:2
6:3
5:10
...
The 1st number will always be double of the 2nd number,
2 is double of 1
4 is double of 2
6 is double of 3
...
9 is not double of 5.
Determine the three-decimal digit approximation of the number √34.
Using a calculator, it can be found that
\(\sqrt{34}=5.83095189...\)Rounding to three decimal places,
\(\Rightarrow\sqrt{34}\approx5.831\)The rounded answer is 5.831In Exercises 11-14, find a point P where the line in- tersects the given plane or decide that the line does not intersect the plane. x =4+2t y=7+2t, z=5+41 x+y-z=2
The point P where the line intersects the given plane as P(3, 6, 3).
Let's apply this method to the specific provided in the question. We have the line defined by the equations:
x = 4 + 2t
y = 7 + 2t
z = 5 + 4t
And the plane given by the equation:
x + y - z = 2
To find the point of intersection, we substitute the parametric equations of the line into the equation of the plane:
(4 + 2t) + (7 + 2t) - (5 + 4t) = 2
Simplifying the equation, we get:
t = -1/2
This tells us that the line intersects the plane at t = -1/2. To find the point of intersection, we substitute this value of t into the parametric equations of the line:
x = 4 + 2(-1/2) = 3
y = 7 + 2(-1/2) = 6
z = 5 + 4(-1/2) = 3
Therefore, the line intersects the plane at the point P(3, 6, 3).
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what is 5 divided 1/3
Answer:
15
Step-by-step explanation:
basic math.
Answer:
its 15 i believe
Step-by-step explanation:
help asap i have no clue what this is
Answer:
A
Step-by-step explanation:
2/4 of an hour is 30 min
2/3 of an hour is 40 min
So he jogged less than he played soccer
Help Pls I cant do it Its due today
Which of the following is an arithmetic sequence?
A.
3, 9, 81, 6561, …
B.
4, 1, −2, −5, …
C.
2, −2, 2, −2, …
D.
4, 1, 4, 7, …
Answer:
D
Step-by-step explanation:
Answer:
It's the B
Step-by-step explanation:
The arithmetic sequence here is made by subtracting 3 every time
Hope this helps, have a good day
Eighty percent of students surveyed said they feel more focused after exercising. Nine hundred fifty students were surveyed. Students Who Feel More Focused after Exercise 20% 20% 20% 20% 20% How many students said they feel more focused after exercising?Eighty percent of students surveyed said they feel more focused after exercising. Nine hundred fifty students were surveyed. Students Who Feel More Focused after Exercise 20% 20% 20% 20% 20% How many students said they feel more focused after exercising?
Answer:760
Step-by-step explanation:
Answer:
760
Step-by-step explanation:
Look at triangles ACB and HGF. Which equation must be true if and only if the figures are similar?
The answer choices are in the picture below and the question is there if you want to look at it there.
ALSO, it would really help me if you would give me a brief explanation of why you chose that answer. How did you solve it? This will really help me understand why its the correct answer.
Answer: Choice D) \(180 - (41+58) = m \angle H\)
===================================================
Explanation:
Choice A isn't particularly useful because while it is a true statement, it doesn't help tie together the two triangles. It only helps us find angle A. It doesn't help is determine any connection to the other triangle. So we can rule choice A out.
Choice C is a similar story, but for the other triangle. So we can rule choice C out.
Choice B is a false statement because 180-(41+58) simplifies to 81; while 180-(41+75) simplifies to 64. This means the equation 180-(41+58) = 180-(41+75) simplifies to 81 = 64, which is false. We can rule choice B out.
The only thing left is choice D. If angle H was the measure of 180-(41+58) = 81, then we could conclude the triangles are similar. Recall that similar triangles have corresponding congruent angles. In the first triangle, the missing angle is A = 180-(41+58) = 81. If we can show that angle H is 81, then this forms one pair of congruent angles. The other pair would be angle F = angle B = 41. All we need at minimum are two pairs of congruent corresponding angles to prove the triangles similar. The theorem we would use is the AA (angle angle) Similarity Theorem.
So this is why choice D is the answer despite the fact that angle H in the diagram is shown to be 75. We would need to rewrite that angle in order to get the triangles to be similar. Currently the diagram shows two triangles that are not similar.
Can someone help with these two questions?
question: what is the slope?
Answer:
-1/2
Step-by-step explanation:
We can see the points (0, 3) and (2, 2) on the graph given.
We can use the formula [ y2-y1/x2-x1 ]
2-3/2-0
-1/2
Best of Luck!
A colony of bacteria grows unchecked in a plate of food left out of the refrigerator. The initial population is 150 bacteria, and this number doubles every 14 minutes. After approximately how long will the food contain 9,600 bacteria?
After approximately 84 minutes, the food will contain 9,600 bacteria based on the given growth rate.
The initial population is 150 bacteria, and this number doubles every 14 minutes. Therefore, the growth rate per unit of time is 2 (since it doubles) and the time period is 14 minutes.
The exponential growth equation for this scenario can be expressed as:
P(t) = P₀ * (2^(t/h))
Where:
P(t) is the population at time t
P₀ is the initial population
t is the time elapsed
h is the time period for the population to double (in this case, 14 minutes)
We want to find the value of t when the population reaches 9,600 bacteria, so we can set up the equation:
9600 = 150 * (2^(t/14))
To solve for t, we need to isolate the variable t. We can start by dividing both sides of the equation by 150:
9600/150 = 2^(t/14)
64 = 2^(t/14)
Next, we can take the logarithm (base 2) of both sides to solve for t:
log₂(64) = log₂(2^(t/14))
6 = (t/14)
Multiplying both sides by 14:
84 = t
After approximately 84 minutes, the food will contain 9,600 bacteria based on the given growth rate.
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6> z(10-z)
Which number is a solution of the inequality?
Answer:
6 > z(10 - z)
6 > 10z - z^2
z^2 - 10z^2 + 6 < 0
z > 9.36, z < 0.64
Therefore, option (0) is the correct answer.
Step-by-step explanation:
HOPE IT HELP
Help me plz is for math
Need help ASAP plz
Answer:
C) postulate
An axiom or a postulate is an accepted statement of fact.
OAmalOHopeO
Answer:
Im pretty sure its definition
For every 3 girls in Mr Hegarty's class there are 2 boys. What is the ratio of girls to boys in the class?
Give your answer in its simplest form.
Answer:
3:2
Step-by-step explanation:
For every 3 girls : there is 2 boys, so it's 3:2
3:6 in simplest form=1:2
The amount of money in a bank account doubles every 3 months, what would be the growth factor for 1 month? Explain how you got your answer.
Answer:
Explanation:
which of the following is equivalent to the product below? thank you for helping!
Answer:
C
Step-by-step explanation:
√9 = 3
3 • √5 • √2 = 3√10
Alternatively, √9 • √5 • √2 = √90 = 3√10
Answer:
C
Step-by-step explanation:
First, multiply all the square roots.
So, sqrt(9) x sqrt(5) x sqrt(2) = sqrt(9x5x2) =sqrt(90)
Think of two numbers that multiply to 90. One possible pair is 9x10.
So, sqrt(90) = sqrt(9x10)
Using the properties of surds,
Sqrt(9x10) = sqrt(9) x sqrt (10)
We know that sqrt(9) = 3
So, sqrt(90) = 3 x sqrt(10)
Hope this helps
2x - 5[4 + 3 (x + 2)] = 9
Step-by-step explanation:
i hope you will get the answer
Step-by-step explanation:
2x - 5 ( 4 + 3 ( x + 2 ) ) = 92x - 5 ( 4 + 3x + 6 ) = 92x - 5 ( 3x + 10 ) = 92x - 15x - 50 = 9-13x - 50 = 9-50 - 9 = 13x-59/13 = xMARK ME AS BRAINLIST45 students participate in a sporting event. The winners are awarded rupees 1000 and all the others are awarded ruppees 200 each gor participation. If the total amount of prize money distributed is ruppees 22,600 find the total number of winners
Answer:
The total number of winners is 17.
Step-by-step explanation:
Let's assume that the number of winners is "x". Then the number of participants who did not win is "45 - x".
The amount of money awarded to the winners is 1000x rupees.
The amount of money awarded to the participants who did not win is 200(45 - x) rupees.
According to the question, the total amount of prize money distributed is 22600 rupees. So we can write:
\(\sf\implies 1000x + 200(45 - x) = 22600 \)
Simplifying this equation:
\(\sf\implies 1000x + 9000 - 200x = 22600 \)
\(\sf\implies 800x = 13600 \)
\(\sf\implies x = 17 \)
Therefore, the total number of winners is 17.
Hope it helps!
Data collected over several time periods are
a. time series data
b. time controlled data
c. cross-sectional data
d. time dependent data
Data collected over several time periods are called time series data.
Time series data refers to data that is collected over several time periods. It captures a sequence of observations of a variable of interest over time, such as sales figures, stock prices, temperature, and so on. The observations are usually taken at regular intervals, such as daily, weekly, monthly or yearly, and the data reflects the changes in the variable over time.
Time series data is useful for identifying trends, patterns, and seasonality in the data, and for making predictions about future values. It's often used in economic forecasting, weather forecasting, and other fields where understanding how a variable changes over time is important.
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graph the line x=2
I'm bad with graphs
Answer:
draw a straight horizontal line that crosses 2
Step-by-step explanation:
8) At the family picnic, 6 people each drank 24 oz of lemonade. How many quarts of lemonade did they drink?
show your thinking
The total amount of lemonade consumed was 6 * 0.75 = 4.5 quarts.
Describe Algebraic Expression?An algebraic expression is a mathematical phrase that consists of variables, constants, and mathematical operations such as addition, subtraction, multiplication, division, exponents, and roots. Algebraic expressions are used to represent a wide range of mathematical problems and are an essential tool in algebra.
In examples, x, y, a, b, and c are variables, and 3, 2, 5, 7, 2, 2, 3, 4, 1, and 2 are constants. The operations used are addition (+), subtraction (-), multiplication (* or ·), division (/), exponentiation (^), and taking the square root (√).
Algebraic expressions can be simplified by combining like terms and using the rules of arithmetic. They can also be evaluated by substituting specific values for the variables.
Each person drank 24/32 = 0.75 quarts of lemonade (since 1 quart = 32 oz).
Therefore, the total amount of lemonade consumed was 6 * 0.75 = 4.5 quarts.
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solve for x with working
Answer:
1
in this *represents x
8*-¹=2/16*
8*-¹= 2/(2)⁴*
8*-¹=2/2⁴*
on comparing quantities , we get
x-1=0/4x
x-1=0
x=1