As given the sum of squares of three consecutive integers, four digits which never occur in the ones place are 1,3,6,8.
As given,
Let x -1 , x , x +1 are three consecutive integers.
Sum of the squares of three consecutive integers
= (x -1)² +x² + (x+1)²
= x² -2x +1 +x² +x² +2x +1
=3x² +2
Now substitute x = 0,1,2,3,4,5,6,7,8,9
Sum = 2, 5,14,29, 50, 77, 110, 149, 194, 245
Four digit never occur at ones place = 1,3,6,8
Therefore, as given the sum of squares of three consecutive integers, four digits which never occur in the ones place are 1,3,6,8.
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One gallon of floor paint costs \$21.99$21.99 and can cover a 2020-foot by 2020-foot floor. How much would the floor paint cost to paint a 140140-foot by 140140-foot floor?
The total cost to cover the floor is $1,077.51
How much will cost to cover a 140ft by 140ft floor?
Here we know that one gallon of floor paint costs $21.99 and covers an area of 20ft by 20ft
That area is 20ft*20ft = 400ft^2
Now, for the floor of 140ft by 140ft the area is:
A = 140ft*140ft = 19,600ft^2
We need to see how many times 400ft^2 are in 19,600ft^2, so we take the quotient:
19,600ft^2/400ft^2 = 49
That is the number of gallons of paint that we will need, then the total cost is:
C = 49*$21.99 = $1,077.51
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Mel randomly selects a coin 200 times selecting a penny 45 times A. The experimental probability of 9 selecting a penny is 40 B. The theoretical probability of 6 selecting a penny is 25 C. The difference between the experimental 1 and theoretical probability is 10 What is the wrong answer?
Answer:
the wrong answer is C, but the right answer is A
vaccinations are intended to prevent illness. suppose a flu vaccine is determined to be effective for 53% of patients administered the shot. a random sample of 85 people will be selected from the population. (a) what is the population proportion of success in the above scenario? (b) calculate the mean of the sampling distribution of the sample proportion of people for whom the shot was effective. (c) calculate the standard deviation of the sampling distribution of the sample proportion of people for whom the shot was effective. (round your answer to three decimal places.)
(a) The population proportion of success is given as 53%. This means that 53% of the population is expected to have a successful outcome from the flu shot.
To calculate the population proportion of success, we are given that the flu vaccine is effective for 53% of patients administered the shot. This means that 53% (or 0.53) of the entire population is expected to have a successful outcome from the flu shot.
(b) The mean of the sampling distribution of the sample proportion is also 53%.
The mean of the sampling distribution of the sample proportion can be calculated using the same population proportion of success, which is 53%. The sampling distribution represents the distribution of sample proportions if multiple samples of the same size are taken from the population. Since the mean of the sampling distribution is equal to the population proportion, the mean in this case is also 53%.
(c) The standard deviation of the sampling distribution of the sample proportion is approximately 0.017.
To calculate the standard deviation of the sampling distribution of the sample proportion, we use the formula:
\(\sigma = \sqrt{\frac{p \cdot q}{n}}\)
where σ represents the standard deviation, p is the population proportion of success (0.53), q is the complement of p (1 - p, which is 0.47), and n is the sample size (85).
Plugging in the values, we get:
\(\sigma = \sqrt{\frac{0.53 \cdot 0.47}{85}}\)
Calculating this expression, we find:
\(\sigma \approx \sqrt{\frac{0.0251}{85}} \approx \sqrt{0.000295} \approx 0.0171\)
Rounding this value to three decimal places, the standard deviation of the sampling distribution of the sample proportion is approximately 0.017.
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how to solve this one
Answer:
Step-by-step explanation:
w^3 + 4w^2 + 5w - 12
I WILL ANSWER SO TIMMY GET CROWN
83 pionts is all i have plez answer this, I need this now assesment due now...
The formula for the blood flow rate can be described by the formula F = (p- q)/R, where F represents the blood flow rate, p represents the pressure in the inlet, q represents the pressure in the outlet, and R represents the vascular resistance.
Use to answer question #1 & #2
Question #1
Solve the formula for the vascular resistance.
R = (p-q)+F
R = (p-q)/F
R = F/(p-q)
R = (p-q)-F
Questions #2
Dyana says that the pressure in the outlet can be found using the formula p = RF+q. Is Dyana correct? Justify your answer.
Yes, p represents the pressure in the outlet and she solved the equation for p correctly
No, p does not represent the pressure in the outlet it is the pressure in the inlet
No, p represents the pressure in the outlet but she did not solve the equation correctly.
Answer:
1. B) R = (p-q)/F
2. B) No, p does not represent the pressure in the outlet; it is the pressure in the inlet.
Step-by-step explanation:
Formula for the blood flow rate
\(F=\dfrac{p-q}{R}\)
where:
F = blood flow rate.p = pressure in the inlet.q = pressure in the outlet.R = vascular resistance.Question 1To solve the formula for vascular resistance, rearrange the given equation to make R the subject.
Multiply both sides of the equation by R:
\(\implies F\cdot R=\dfrac{p-q}{R} \cdot R\)
\(\implies FR=p-q\)
Divide both sides by F:
\(\implies \dfrac{FR}{F}=\dfrac{p-q}{F}\)
\(\implies R=\dfrac{p-q}{F}\)
Therefore, the formula for vascular resistance is:
\(R=\dfrac{p-q}{F}\)
Question 2To solve the formula for the pressure in the outlet, rearrange the given equation to make q the subject.
Multiply both sides of the equation by R:
\(\implies F\cdot R=\dfrac{p-q}{R} \cdot R\)
\(\implies FR=p-q\)
Add q to both sides of the equation:
\(\implies FR+q=p-q+q\)
\(\implies FR+q=p\)
Subtract FR from both sides of the equation:
\(\implies FR+q-FR=p-FR\)
\(\implies q=p-FR\)
Therefore, Dyana is incorrect as p does not represent the pressure in the outlet; it is the pressure in the inlet.
A movie studio wishes to determine the relationship between the revenue from the streaming rental of comedies and the revenue generated from the theatrical release of such comedies. The studio has the following bivariate data from a sample of fifteen comedies released over the past five years. These data give the revenue from theatrical release (in millions of dollars) and the revenue from streaming rentals (in millions of dollars) for each of the fifteen movies. The data are displayed in the Figure 1 scatter plot. Also given is the product of the theater revenue and the rental revenue for each of the fifteen movies. (These products, written in the column labelled "", may aid in calculations.)
The value of the slope of the regression line that determine the relationship between the revenue has the slope of 4.1667.
What is slope of a line?The change in y coordinate relative to the change in x coordinate is referred to as a line's slope in mathematics. The lines drawn on the coordinate plane have been observed in geometry. The easiest technique to determine this without using any geometrical tools is to measure the slope. This will allow you to anticipate whether the lines are parallel, perpendicular, or at any angle.
The two coordinates of the regression line obtained from the table are:
(9.4, 26.1) and (11.8, 36.1)
The slope of the equation is given by:
m = (y2 - y1) / (x2 - x1)
Substitute the coordinates:
m = (36.1 - 26.1)/(11.8 - 9.4)
m = 10 / 2.4
m = 4.1667
Hence, the value of the slope of the regression line that determine the relationship between the revenue has the slope of 4.1667.
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HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
Answer:
number 8 is $0
number 9 is D
Answer:
number 8 is $0
number 9 is D
Which of the following is an example of a quadratic equation?
O A. X+10 - 33
O B. y - 4x+6
OC. x2-64-0
O D. V-746
Hello!
Answer: C. x² - 64 - 0
Good luck! :)
How can i show that p^(q-1) + q^(p-1) = 1 (mod pq)?
Step-by-step explanation:
you can just put in some values to check.
I actually used p =2 and q=3
the It will be
2^3-1 + 3^2-1 = 1 (mod 2×3)
2^2 +3^1 = 1 (mod 6)
4+3= 1 (mod6)
7= 1 (mod6)
which is true.
therefore p^(q-1) + q^( p-1) = 1 ( mod pq) is true
To show that p^(q-1) + q^(p-1) = 1 (mod pq), we can use Fermat's Little Theorem, which states that if p is a prime number and a is an integer not divisible by p, then a^(p-1) = 1 (mod p). Using this theorem, we can first show that p^(q-1) = 1 (mod q), since q is a prime number and p is not divisible by q. Similarly, we can show that q^(p-1) = 1 (mod p), since p is a prime number and q is not divisible by p.
Therefore, we can write:
p^(q-1) + q^(p-1) = 1 (mod q)
p^(q-1) + q^(p-1) = 1 (mod p)
By the Chinese Remainder Theorem, we can combine these two equations to obtain:
p^(q-1) + q^(p-1) = 1 (mod pq)
Thus, we have shown that p^(q-1) + q^(p-1) = 1 (mod pq).
We'll use Fermat's Little Theorem to show that p^(q-1) + q^(p-1) = 1 (mod pq).
Fermat's Little Theorem states that if p is a prime number and a is an integer not divisible by p, then:
a^(p-1) ≡ 1 (mod p)
Step 1: Apply Fermat's Little Theorem for p and q:
Since p and q are prime numbers, we have:
p^(q-1) ≡ 1 (mod q) and q^(p-1) ≡ 1 (mod p)
Step 2: Add the two congruences:
p^(q-1) + q^(p-1) ≡ 1 + 1 (mod lcm(p, q))
Step 3: Simplify the congruence:
Since p and q are prime, lcm(p, q) = pq, so we get:
p^(q-1) + q^(p-1) ≡ 2 (mod pq)
In your question, you've mentioned that the result should be 1 (mod pq), but based on Fermat's Little Theorem, the correct result is actually:
p^(q-1) + q^(p-1) ≡ 2 (mod pq)
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Describe the translation from the red figure to the blue figure.
The figure red has been shifted by 5 units left and 2 units down to form the blue.
What is translation?A translation is a type of transformation that takes each point in a figure and slides it the same distance in the same direction.
From figure ,
Coordinates of point red = (2, 3)
Coordinates of point blue = (-3, 1)
here, figure shows the translation of peak point of red to blue.
So, red(2, 3) → blue(-3, 1)
→ blue[(2 - 5), (3 - 2)]
Hence, figure red has been shifted by 5 units left and 2 units down to form the blue.
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Find the measure of the missing angles.
Answer:
x = 39°
y = 129°
Step-by-step explanation:
x = 90° - 51° = 39°
y = 180° - 51° = 129°
Use the figure shown. Find the slope of the line. A right-triangle graphed on a coordinate plane. Vertex A is at ordered pair negative 2 comma 1. Vertex B is at ordered pair negative 4 comma 2. Vertex C is at ordered pair negative 2 comma 2. A line passes through the vertices A and B. The slope is
The coordinate plane, also known as the Cartesian plane, is a two-dimensional plane that is used to plot and locate points using a set of two perpendicular axes. The horizontal axis is called the x-axis and the vertical axis is called the y-axis.
What is the coordinate plane?The point where the two axes intersect is called the origin, which is usually denoted by the coordinates (0,0).
Each point in the plane can be located by its unique pair of coordinates (x,y), where x represents the horizontal distance from the origin and y represents the vertical distance from the origin.
To find the slope of the line passing through vertices A and B, we need to use the formula:
slope \(= (y2 - y1)/(x2 - x1)\)
Where (x1, y1) and (x2, y2) are the coordinates of the two points.
To find the slope of the line passing through vertices A(-2, 1) and B(-4, 2), we can use the slope formula:
slope = (change in y)/(change in x) \(= (y2 - y1)/(x2 - x1)\)
Substituting the coordinates of A and B into the formula, we get:
slope \(= (2 - 1)/(-4 - (-2)) = 1/-2 = -1/2\)
Therefore, the slope of the line passing through vertices A and B is -1/2.
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Which expression is equivalent to 180?
Answer:
\( \sqrt{2.2.3.3.5} \)
\(\sqrt{2.2.3.3.5}\) is equivalent to \(\sqrt{180}\). Correct option is 1. First, we look for perfect square factors within 180. We can factor 180 as follows: \(\(180 = 2^2 \times 3^2 \times 5\)\)
Next, we can group the perfect square factors together:
\(\(180 = (2 \times 3)^2 \times 5\)\)
Since we are taking the square root of 180, we can rewrite it as the square root of its perfect square factors multiplied by the remaining non-perfect square factor:\(\(\sqrt{180} = \sqrt{(2 \times 3)^2 \times 5}\)\)
The square root of a perfect square is just the value of the number itself:
\(\(\sqrt{180} = 2 \times 3 \times \sqrt{5}\)\)
Finally, we can simplify the expression by multiplying the numbers outside the square root \(\(\sqrt{180} = 6\sqrt{5}\)\)
So, the expression \(\(6\sqrt{5}\)\) is equivalent to \(\(\sqrt{180}\)\), and it represents the positive square root of 180 with any perfect square factors taken outside the square root sign.
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a, b, c, and d are distinct lines in the same plane. Exercises 14-21 show different combinations of relationships between a and b, b and c, and c and d. For each combination of the three relationships, how are a and d related? a || 6,6 || C, Cidif anyone could give me the formula to solve this or a explanation that would be amazing! thank you.
it is given
a II b and b II c
and c perpendicular to d
as a is parallel to b and b is parallel to c ,
so a would-be parallel to c also, but c is perpendicular to d
so, a also will be perpendicular to d.
so the answer is
\(a\perp d\)a is perpendicular to d
The measure of Angle b is 84 degrees and the measure of angle c is 13 degrees. What is the measure of angle a?
Type your answer...
In triangle ABC, we get that the measure of angle a is 83°.
In triangle ABC, we are given that:
angle b = 84 degrees
∠ b = 84°
angle c = 13 degrees.
∠ c = 13°
Now, we know by the angle sum property of the triangle that:
∠ a + ∠ b + ∠ c = 180°
Substituting the values, we get that:
∠ a + 84° + 13° = 180°
∠ a = 180° - 97°
Subtracting the angles, we get that:
∠ a = 83°
Therefore, in triangle ABC, we get that the measure of angle a is 83°.
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a blueprint of a house has a scale in which one inch represents four and a half feet if a living room wall measures seven and one eighth inches on the drawing what is the actual length of the wall
Scales on a wall, change of units conversion
1 inch = 4 1/2 feets
7 1/8 inches = ?
First convert to fractions
(4 + 1/2) • ( 7 + 1/8) =
apply distributive law ( a+b)•(c+d)= ac + ad + bc + bd
then length of wall= 4•7 + 4/8 + 7/2 + 1/16
= 28 + 8/16 + 56/16 + 1/16
= 28 + 64/16 + 1/16
= 28 + 4 + 1/16
= 32 + 1/16
lenght is 32 and 1/16 feet
F(x)=6/x-2 brainly find f(3) ANYBODY PLEASE HELP!!! ILL GIVE BRAINLIEST
Answer:
see explanation
Step-by-step explanation:
if you mean
f(x) = \(\frac{6}{x-2}\) , then substituting x = 3 into f(x)
f(3) = \(\frac{6}{3-2}\) = \(\frac{6}{1}\) = 6
If you mean
f(x) = \(\frac{6}{x}\) - 2 , then substituting x = 3 into f(x)
f(3) = \(\frac{6}{3}\) - 2 = 2 - 2 = 0
HELP!
Choose all that give the correct expression for the quantity described.
The difference of nine times a number x and the quotient of that number and 5.
9x − x over 5
Eight more than the quotient of twelve and a number n.
n over 12 + 8
The product of a number and the quantity ’six minus the number’ plus the quotient of eight and the number.
x(6 − x) + 8 over x
Sum of three consecutive even integers.2x + (2x + 2) + (2x + 4)
Answer:
did u ever get on answer cause I'm stuck in this too
Step-by-step explanation:
Find the Fourier series for periodic function f (x) of period 2π,f(x)=x2,−π≤x≤π.
FOURIER SERIES
A Fourier series is an expansion of a periodic function f(x) in terms of an infinite sum of sines and cosines.
The formula of Fourier Series:
f(x)=a02+∑[infinity]n=1ancos(nπxl)+∑[infinity]n=1bnsin(nπxl)
Where:
ao=1l∫l−lf(x)dxan=1l∫l−lf(x)cos(nπxl)dxbn=1l∫l−lf(x)sin(nπxl)dx
The Fourier series for \(\(f(x) = x^2\)\) with a period of \(\(2\pi\)\) is an infinite sum of sine terms that accurately approximates the function within the specified interval.
The Fourier series formula for the periodic function \(\(f(x) = x^2, -\pi \leq x \leq \pi\)\) is:
\(\[f(x) = \frac{a_0}{2} + \sum_{n=1}^{\infty} (a_n \cos(n\pi x/L) + b_n \sin(n\pi x/L))\]\)
where:
\(\[a_0 = \frac{1}{L} \int_{-L}^{L} f(x) dx\]\[a_n = \frac{1}{L} \int_{-L}^{L} f(x) \cos(n\pi x/L) dx\]\[b_n = \frac{1}{L} \int_{-L}^{L} f(x) \sin(n\pi x/L) dx\]\)
For \(\(f(x) = x^2\) with \(L = \pi\)\), let's calculate the coefficients:
\(\[a_0 = \frac{1}{\pi} \int_{-\pi}^{\pi} x^2 dx\]\[a_n = \frac{1}{\pi} \int_{-\pi}^{\pi} x^2 \cos(n\pi x/\pi) dx\]\[b_n = \frac{1}{\pi} \int_{-\pi}^{\pi} x^2 \sin(n\pi x/\pi) dx\]\)
Simplifying the integrals and performing the calculations will yield the specific values for \(\(a_0\), \(a_n\), and \(b_n\)\).
For \(\(f(x) = x^2\) with \(L = \pi\)\), let's calculate the coefficients:
\(\[a_0 = \frac{1}{\pi} \int_{-\pi}^{\pi} x^2 dx\]\[a_n = \frac{1}{\pi} \int_{-\pi}^{\pi} x^2 \cos(n\pi x/\pi) dx\]\[b_n = \frac{1}{\pi} \int_{-\pi}^{\pi} x^2 \sin(n\pi x/\pi) dx\]\)
Integrating each term, we get:
\(\[a_0 = \frac{1}{\pi} \left[\frac{x^3}{3}\right]_{-\pi}^{\pi} = \frac{1}{\pi} \left(\frac{\pi^3}{3} - \frac{(-\pi)^3}{3}\right) = \frac{2\pi^2}{3}\]\[a_n = \frac{1}{\pi} \left[\frac{x^3 \sin(n\pi x/\pi)}{n\pi}\right]_{-\pi}^{\pi} = \frac{1}{\pi} \left(\frac{\pi^3 \sin(n\pi)}{n\pi} - \frac{(-\pi)^3 \sin(-n\pi)}{n\pi}\right) = 0\]\)
\(\[b_n = \frac{1}{\pi} \left[-\frac{x^3 \cos(n\pi x/\pi)}{n\pi}\right]_{-\pi}^{\pi} = \frac{1}{\pi} \left(-\frac{\pi^3 \cos(n\pi)}{n\pi} + \frac{(-\pi)^3 \cos(-n\pi)}{n\pi}\right) = \frac{2(-1)^n}{n^2}\]\[f(x) = \frac{\pi^2}{3} + \sum_{n=1}^{\infty} \left(\frac{2(-1)^n}{n^2} \sin(n\pi x/\pi)\right)\]\)
This series allows us to represent the function \(\(f(x) = x^2\)\) as an infinite sum of sine terms.
Each term in the series contributes to the overall approximation of the function. As we include more terms in the series, the approximation becomes more accurate.
The coefficients \(\(a_n\)\) for the cosine terms are all zero, indicating that the function is an odd function. The coefficients \(\(b_n\)\) for the sine terms follow a specific pattern with alternating signs. By summing these terms, we can reconstruct the original function within the specified interval.
In conclusion, the Fourier series for \(\(f(x) = x^2\)\) with a period of \(\(2\pi\)\) is an infinite sum of sine terms that accurately approximates the function within the specified interval.
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Please hurry
The width of a sandbox is represented by x+5 The length of the sandbox is double the width. Determine an expression that would represent the area of the sandbox. To earn full credit, show your work using a method explained in the Orientation.
Answer: (x+5)(2x+10)
Step-by-step explanation: Hope you find it helpful, I am in the rush so can't give you a full explanation on paper yet!
A boy cycles at an average speed of 22 km/h . How long does it take him to travel 55 km ?
Answer:
Step-by-step explanation:
that is 55/22 = 2.5 hrs
Answer: .two and a half hours.
Step-by-step explanation:
22/1 = 55/x
22x=55
X=2.5
Bob order 151/2 pound of cherrys fron the farm,this year they want to order 1 1/4 more pound but then 2/5 of the order they want blue berrys what is the percent
Answer:
Percentage of cherries = 60 %
Percentage of berries = 40 %
Step-by-step explanation:
He orders 15 1/2 pounds every year.
He wants more= 1 1/4 pounds
So the total pounds = 15 1/2 + 1 1/4
= 15 + 1 + 1/2 + 1/4
= 16 + (2+1)/4
= 16 + 3/4
= 16 3/4 pounds
Out of 16 3/4 pounds they want 2/5 part to be of blue berries.
So blue berries = 16 3/4 * ( 2/5)
= 67/4 * ( 2/5)
= 67/10 = 6 7/10 pounds
Amount of cherries= 16 3/4- 6 7/10
= 10 3/4- 7/10
= 10 (15- 14)/20
= 10 1/20 pounds
Percentage of cherries = Amount of cherries/ Total amount * 100
= 201/20 / 67/4 *100
= 201/20 * 4/67 *100
= 201/335 *100
= 60 %
Percentage of berries = 100- 60 = 40 %
is a fraction a term? If it's not a term, why is it that we can apply the distributive property to it? the distributive property only works for either terms, or addition and subtraction. a fraction is technically division, so why does it work? Please help!!!!!
No, a fraction is not a term. The distributive property can be applied to fractions because it is a general mathematical principle.
A fraction is not considered a term in the traditional sense. It is a mathematical expression that represents division. However, the distributive property can still be applied to fractions because the property itself is a fundamental rule of arithmetic that extends beyond specific types of expressions.
The distributive property states that for any real numbers a, b, and c:
a × (b + c) = (a × b) + (a × c).
When working with fractions, we can apply the distributive property as follows:
Let's consider the expression: a × (b/c).
We can rewrite this as: (a × b)/c.
Now, let's distribute the 'a' to 'b' and 'c':
(a × b)/c = (a/c) × b.
In this step, we applied the distributive property to the fraction (a/c) by treating it as a whole.
Although fractions represent division, we can still use the distributive property because it is a general mathematical principle that allows for manipulating expressions involving addition, subtraction, multiplication, and division.
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This list shows the items in your family’s monthly budget. Which items are fixed expenses? a) Rent payment, gas bill, student loan payment, and credit card payment b) Electric bill, water and sewage bill, credit card payment, and gas bill c) Rent payment, car payment, student loan payment, and car insurance payment d) Electric bill, credit card payment, student loan payment, and car payment (can you please explain it too, thank you!)
Answer:
C
Step-by-step explanation:
Hope this is right. Let me know if not! Have a nice day :)
Answer:
C
Step-by-step explanation:
i got it right
true or false. a dialation with a negative scale factor has the center of dialation between the pre-image and image
Answer:
It is true bc i think its turne
o
o
o
o
o
o
o
o
o
o
o
o
o
oo
Step-by-step explanation:
The number of people call 911 on March 25th?
A) continuous
B) discrete
C) categorical
Answer:
I think the answer is continuous hope this helps
Step-by-step explanation:
Also got subscribe to my YT channel BlxeVxbes
Which of these sets of ordered pairs would define a line with a negative slope?
A. (5, 5) and (0, 1)
B. (2, 3) and (-4, -1)
C. (3, 6) and (5, 1)
D. (2, 3) and (76)
From the following sets of ordered pairs, line c, (3, 6) and (5, 1), has a negative slope.
To determine the slope of a line given two points, we can use the formula:
slope = (y2 - y1) / (x2 - x1)
where (x1, y1) and (x2, y2) are the coordinates of the two points.
If the slope is negative, it means the line is decreasing as we move from left to right, or in other words, it has a negative slope.
Let's apply the formula to each set of ordered pairs:
A. slope = (1 - 5) / (0 - 5) = -4 / -5 = 4/5 (positive slope)
B. slope = (-1 - 3) / (-4 - 2) = -4 / -6 = 2/3 (positive slope)
C. slope = (1 - 6) / (5 - 3) = -5 / 2. (negative slope)
D. This set has only one point (2, 3) and is therefore not sufficient to define a line.
Therefore, only option C has a negative slope. Option B has a positive slope. Option A has a positive slope. Option D is not sufficient to define a line.
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What is the surface area? Will give brainliest (HURRY pls!!!)
A) 821 sq m
B) 810 sq m
C) 908 sq m
D) 704 sq m
Answer:
B) 810m²
Step-by-step explanation:
Use the Pythagorean Theorem to solve for the 3rd side of the triangle. You get 22.5.
Two triangles
1/2x12x22.5=135
Two rectangles
9x22.5=202.5
9x25.5=229.5
One rectangle
9x12=108
135+135+202.5+229.5+108=810
Suppose the mean is 80 and the variance is 400 for a population. In a sample where n=100 is randomly taken, 95% of all possible sample means will fall above 76.71. True False
The statement is true that 95% of all possible sample means will fall above 76.71.
We know that the sample mean can be calculated using the formula;
\($\bar{X}=\frac{\sum X}{n}$\).
Given that the mean is 80 and the variance is 400 for the population and the sample size is 100. The standard deviation of the population is given by the formula;
σ = √400
= 20.
The standard error of the mean can be calculated using the formula;
SE = σ/√n
= 20/10
= 2
Substituting the values in the formula to get the sampling distribution of the mean;
\($Z=\frac{\bar{X}-\mu}{SE}$\)
where \($\bar{X}$\) is the sample mean, μ is the population mean, and SE is the standard error of the mean.
The sampling distribution of the mean will have the mean equal to the population mean and standard deviation equal to the standard error of the mean.
Therefore,
\(Z=\frac{76.71-80}{2}\\=-1.645$.\)
The probability of the Z-value being less than -1.645 is 0.05. Since the Z-value is less than 0.05, we can conclude that 95% of all possible sample means will fall above 76.71.
Conclusion: Therefore, the statement is true that 95% of all possible sample means will fall above 76.71.
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Calcula el volumen, en centímetros cúbicos, de una habitación que tiene 5 m de largo, 4 m de ancho y 2.5 m de alto.
Answer:
50,000,000 centímetros cúbicos.
Step-by-step explanation:
En la pregunta anterior, se nos dan las dimensiones de este cubo en metros como:
Longitud = 5m
Ancho = 4 m
Altura = 2.5 m
Nos dijeron que encontraramos el volumen en centímetros cúbicos
Paso 1
Convierta todas estas dimensiones a centímetros
1m = 100cm
Por lo tanto:
Longitud = 5 m = 5 × 100 cm = 500 cm
Ancho = 4 m = 4 × 100 cm = 400 cm
Altura = 2.5 m = 2.5 × 100cm = 250cm
Paso 2
Fórmula para el volumen de un cubo = Largo × Ancho × Alto
Volumen = 500 cm × 400 cm × 250 cm
Volumen = 50,000,000 centímetros cúbicos.
Por lo tanto, el volumen, en centímetros cúbicos, de la habitación es de 50,000,000 centímetros cúbicos.