Answer:
\(4x^2 - 5x + 1 = 0\)
Step-by-step explanation:
\(x^2+(1-x)(1-3x)=x\\x^2+(1-x)(1-3x) - x = 0\\x^2+ 3x^2 - 4x + 1 - x = 0\\\\\)
4x^2 - 5x + 1 = 0
If a = 3 what is the value of b in the equation 2a+b=13? And can you explain?
Answer:
b=7
Step-by-step explanation:
Plug 3 into a since a=3.
2(3)+b=13
Then solve for 2(3)
6+b=13
Now isolate the b, so move the 6 to the other side. (Basically subtract 6 from both sides)
b=13-6
b=7
445,473 divided by 316 = ?
Answer:
1409.724683544
Step-by-step explanation:
You could have just used a calculator lol
Fully simplify 5√/20 - 4√5
70% of the customers at the local ice cream shop order their ice cream on a sugar cone. assuming that the next ten customers order independently of one another, what is the probability that exactly seven of them order sugar cones?
The probability that exactly seven of them order sugar cones is 0.27.
Since in this question, we have a fixed number of trials (ten customers) and each trial has only two possible outcomes (sugar cone or not sugar cone), we can solve this question using the binomial distribution.
According to the question the probability of ordering a sugar cone is 0.7 and not ordering is 0.3
The probability mass function for the binomial distribution is:
P(X=k) = (n choose k) * p^k * (1-p)^(n-k)
where n is the number of trials, k is the number of successes(ordering sugar cone), and p is the probability of success.
So, using this formula we get,
P(X=7) = (10 choose 7) * 0.7^7 * 0.3^3 = 0.2668 ≈0.27
Therefore, the probability that exactly seven of the next ten customers will order sugar cones is 0.27.
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the other khan academy
Answer:
(7,3)
Step-by-step explanation:
difference between 3,-8 and 5, -2.5 is 2x and 5.5y.
so, add those to (5,-2.5) and you get (7,3)
qual das inequações seguintes e equivalente à inequação -2x <4?
a) x<-2
b) x>-2
c) x<2
d) x>2
Answer:
I dont get your question
For the following relation to be a function, x CANNOT be
(12,14), (13,5), (-2,7), (x,13)
A. 1, 2, or 3
B. 7, 8, or 10
C. 12, 13, or -2
D. 14, 5, or 7
Can you please help me with this question
Answer:
(x,y) --> (x + 1, y - 4)
Step-by-step explanation
The figure is translated right 1 and down 4
(not completly sure but did not want to leave you hanging)
if the value of the sample covariance between the two random variables x and y equals 14.67, then we can conclude that x and y have a (an) ______
The answer of the given question is positive linear relationship.
If the value of the sample covariance between the two random variables x and y equals 14.67, then we can conclude that x and y have a positive linear relationship.
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If the value of the sample covariance between the two random variables x and y equals 14.67, we can conclude that x and y have a positive linear relationship or association
Covariance measures the direction and strength of the relationship between two variables. A positive covariance indicates that as the values of x increase, the values of y tend to increase as well, and vice versa. In other words, there is a tendency for the variables to move in the same direction.
However, the value of covariance alone does not provide information about the strength or the exact nature of the relationship. To determine the strength and statistical significance of the relationship, additional analysis, such as calculating the correlation coefficient or performing hypothesis tests, may be necessary.
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determine if the expression -5s^4t^2-8t^4 is a polynomial or not if its is a polynomial state the type and degree of the polynomial
The expression is a polynomial, it is a binomial of degree 6.
Is the expression a polynomial?We want to see if the given expression:
-5s⁴t² - 8t⁴
We know that as long as the exponents are positive whole numbers, then it will be a polynomial.
It is a bynomial, because it has two terms.
Now to identify the degree we need to find the maximum exponent in a single term.
If you look at the first term we have 2 exponents, the sum of these expoents will be teh degree, then we will get:
degree = 4 + 2 = 6
degree = 6
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(5, 8, 17) whether the following triplets are Pythagorean or not?
Answer:
No.
Step-by-step explanation:
Pythagorean Thereom is a square plus b square = c square
25 + 64 is not equal to 289.
Using the pythagorean theorem we have :
\(a^{2} + b^{2} = c^{2}\) (assuming a < b < c)
Replace the number, we have :
\(5^{2} + 8^{2} = 17^{2}\)
\(25 + 64 = 289\) (not true)
So, this triplet is not available for the pythagorean.
QuestionUse the Distributive Property to simplify the expression.9(3+c+4)QuestionUse the Distributive Property to simplify the expression.9(3+c+4)
Answer:
Step-by-step explanation:
9c+63
You multiply the nine to every number in the parentheses
Answer:
Step-by-step explanation:
here we have the expression 9(3+c+4) which is the same as 9(c+7) using the Distributive Property we get 9c+63 becasue a(b+c) is the same as ab+ac.
Mr. Daniels is organizing a class trip. He wants to spend less than $300. Which inequality represents the cost, c, that Mr. Daniels can spend on the class trip?
c < 300
The inequality that represents the cost, c, that Mr. Daniels can spend on the class trip is; c < 300
How to solve Inequality word problems?
We are told that;
Mr. Daniels is organizing a class trip.
Mr. Daniels wants to spend less than $300
Thus, if the cost that Mr. Daniels can spend on the class trip is given as c, then it means that c has to be less than the amount which he wants to spend which is $300.
Thus, since c has to be less than $300, then it means that the inequality to be used would be a less than sign which can be expressed as;
c < 300
Thus, we conclude that it is the required inequality.
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Which equation shows the variable terms isolated on one side and the constant terms isolated on the other side for the equation 3X -5 equals negative 2X +10
Answer:
\(5x= 15\)
Step-by-step explanation:
Given
\(3x - 5 = -2x +10\)
Required
Write the variables and constants on different sides
\(3x - 5 = -2x +10\)
Add 2x to both sides
\(2x + 3x - 5 =2x -2x +10\)
\(5x - 5 =10\)
Add 5 to both sides
\(5x - 5 + 5 = 10 + 5\)
\(5x= 10 + 5\)
\(5x= 15\)
Hence, the equation is
\(5x= 15\)
Solving further [divide both sides by 5]
\(x = 3\)
I think it is -5=x
Step-by-step explanation:
the scaling assumptions underlying a question determine which measure is appropriate. a. descriptive b. inference c. difference d. association
The scaling assumptions underlying a question determine which descriptive measure is appropriate.
The descriptive degree can be defined as the sort of measure handling the quantitative information in a mass that famous certain preferred characteristics. The descriptive measure has different types, all depending on the one-of-a-kind characteristics of the statistics. One very critical degree is the correlation coefficient, now and again referred to as Pearson's r. The correlation coefficient measures the diploma of linear association between two variables.
A statistic is a numerical descriptive degree computed from sample information. A parameter is a numerical descriptive measure of a populace. Descriptive facts encompass measures of the count, together with; frequencies and chances, measures of vital tendency including; imply, median, and mode, measures of variability including; trendy deviation, variance, and kurtosis, and measures of role, along with; percentiles and quartiles.
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What is the standard algebraic equation for a linear function whose graph is a straight line?
Answer:
y = mx + b
Step-by-step explanation:
Find the missing terms in each geometric sequence.
1. 3, 12, 48 __, __
2. __, __, 32, 64, 128, ...
3. 120, 60, 30, __, __
4. 5, __, 20, 40, __, __
5. __, 4, 12, 36, __, __
Need some help, thanks in advance!
Answer: = 3 acres per day
Showing Work
This is a fraction equal to
3 acres ÷ 1 days
We want a unit rate where
1 is in the denominator,
so we divide top and bottom by 1
3 acres ÷ 1
__________
1 days ÷ 1
=
3 acres
_____
1 day
=
3 acres
______
day
= 3 acres per day
Reflect the polygon, K(-4, 6), L(-2, -2), M(6, -1), N(8, 7); y=-1
Answer:
I think it is 22 but I might be wrong.
Step-by-step explanation:
A participant is randomly selected. Let C be the event that the participant prefers country music and let T be the event that the participant is a teen. What is the value of P(C or T)?
Answer: 0.55
Step-by-step explanation:
Need help on this question
Answer:
10 units.
Step-by-step explanation:
In order to solve this, we first need to know the distance of the points by using rise and run. Then we will be able to find the hypotenuse. This is pretty much gonna make a triangle.
Run = 6
Rise = 8
We can use Pythagorean Theorem to solve for the hypotenuse since this forms a right triangle.
6² + 8² = c²
36 + 64 = c²
100 = c²
10 = c
Therefore, the distance between the two points is 10 units.
Answer:
10
Step-by-step explanation:
\(8^{2}\) + \(6^{2}\) = \(\sqrt{100}\) = 10
At a customer service center, the call rate is believed to be 2 calls per minute, and governed by a Poisson process. (a) Find the probability the service center will receive more than 4 calls in a 1-minute period. (b) The service center opens at 8:00 am. Find the probability the first call is received between 8:01 and 8:02 am. (c) A service representative complains to her supervisor that they are receiving many more calls, on average, than 2 per minute. The supervisor designs a significance test (level 0.05) by counting the number of calls arriving during a 1-minute interval. If too many calls are received, she will reject the hypothesis of 2 calls per minute, on average. How many calls is too many? Regardless of the number of calls received, 20% of all calls are complaints, and the remaining 80% are requests for assistance. (d) If the center receives exactly 3 calls, find the probability that exactly 2 of them will be (e) Let X be the total number of calls received in a 5 minute period. Let Y be the number of complaints received in a 5 minute period. Construct the joint PMF of X and Y. If you choose to write the PMF as a table of values, complete the table only through X = 2 and Y = 2. (See below.) 0 1 N 3... X Y 0 1 2 3...
The probability that the service center will receive more than 4 calls in a 1-minute period is 0.2061. The probability that the first call is received between 8:01 and 8:02 am is approximately 0.2381.
(a) Let X be the number of calls in a 1-minute period. Then, X ~ Poisson(2). We need to find P(X > 4). Using the Poisson probability formula:
P(X > 4) = 1 - P(X ≤ 4) = 1 - ∑(k=0 to 4) e^(-2) * 2^k / k!
Calculating the sum, we get:
P(X > 4) = 1 - (e^(-2)*2^0/0! + e^(-2)*2^1/1! + e^(-2)*2^2/2! + e^(-2)*2^3/3! + e^(-2)*2^4/4!)
= 1 - (0.4060 + 0.2707 + 0.0902 + 0.0225 + 0.0045)
= 0.2061
Therefore, the probability that the service center will receive more than 4 calls in a 1-minute period is 0.2061.
(b) Let Y be the time (in minutes) between the opening of the center and the first call received. Then, Y ~ Exponential(2). We need to find P(1 < Y ≤ 2). Using the Exponential probability formula:
P(1 < Y ≤ 2) = ∫(1 to 2) 2e^(-2y) dy
Evaluating the integral, we get:
P(1 < Y ≤ 2) = e^(-2) - e^(-4) ≈ 0.2381
Therefore, the probability that the first call is received between 8:01 and 8:02 am is approximately 0.2381.
(c) Let X be the number of calls in a 1-minute period. We want to find the number of calls that is too many, such that if the center receives that many calls, the supervisor will reject the hypothesis of 2 calls per minute, on average, at a significance level of 0.05. This is equivalent to finding the critical value of X for a Poisson distribution with λ = 2 and a right-tailed test with α = 0.05. Using a Poisson distribution table or a calculator, we find that the critical value is 5.
Therefore, if the center receives 6 or more calls in a 1-minute period, the supervisor will reject the hypothesis of 2 calls per minute, on average, at a significance level of 0.05.
(d) Let X be the number of calls in a 1-minute period. We want to find P(2 out of 3 calls are complaints). Since each call is a complaint with probability 0.2 and a request for assistance with probability 0.8, the distribution of X is a Binomial(3, 0.2). Therefore:
P(2 out of 3 calls are complaints) = P(X = 2) = (3 choose 2) * 0.2^2 * 0.8^1 = 0.096
Therefore, the probability that exactly 2 out of 3 calls are complaints is 0.096.
(e) Let X be the total number of calls in a 5-minute period, and let Y be the number of complaints in a 5-minute period. Then, X ~ Poisson(10) and Y ~ Binomial(25, 0.2), since there are 25 independent 1-minute periods in a 5-minute period, and each call is a complaint with probability 0.2.
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11 Points given (I dont have any left :( )
The first four points in this table have been plotted on the scatter graph. Species 1 2 1 2 1 Length (cm) 6.8 7.8 5.8 6.6 6.3 Wingspan (cm) 9.9 8.8 8.6 8.0 9.2 a) Which of the points A-D shows where the last point should be plotted? b) What shape should the last point be? Length and wingspan of two butterfly species 10- Wingspan (cm) 9- co 5 O O Ax xB CD + 6 Length (cm) 7 co Key Species 1 ■ Species 2
Answer:
C, circle
Step-by-step explanation:
You want to find the point on the graph that has coordinates (6.3, 9.2) and the symbol for Species 1.
GraphThe horizontal axis is labeled "Length (cm)", so the desired point will have a horizontal coordinate of 6.3. The minor grid lines have a spacing of (1 cm)/5 = 0.2 cm. This means the desired point will be located 0.3/0.2 = 1.5 minor grid lines to the right of the one marked 6 cm. Points A and C are in that location.
The vertical axis is labeled "Wingspan (cm)", so the desired point will have a vertical coordinate of 9.2. The minor grid lines have a spacing of (1 cm)/5 = 0.2 cm, so the desired point will be 0.2/0.2 = 1 minor grid line above the one marked 9 cm. Point C is in that location.
(a) PointThe last point will be plotted at location C.
(b) SymbolThe last point in the table has a "Species" of "1", so will be plotted with a dotted circle.
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How many times will the following loop execute?
int x = 0;
do {
x++;
cout << x << endl;
}while(x < 5)
Answers:
a. - 5 times
b. - 4 times
c. - It doesn't
d. - Infinite times
e. - 6 times
Answer:
Step-by-step explanation:
The loop will run an infinite number of times
Which of the following is a point-slope equation for a line with the point(-2, 4) and a slope of 3?O A. y+2=3(x-4)O B. y-4=3(x+2)O C. y-2=3(x-4)O D. y - 4= 3(x-2)
Given that
The point is (-2, 4) and the slope is 3.
And we have to find the point-slope equation for this data.
Explanation -
First, we will write the formula to find the point-slope equation and then we will substitute the values to find the required equation.
The general point-slope equation is given as
\(\begin{gathered} y-y_1=m(x-x_1) \\ where\text{ m is the slope and the point is \lparen x}_1,y_1) \end{gathered}\)We have slope, m = 3 and point (x1, y1) = (-2, 4)
Hence the required equation is
\(\begin{gathered} y-4=3(x-(-2)) \\ y-4=3(x+2) \end{gathered}\)So the correct option is B.
Final answer -
Hence the final answer is y-4 = 3(x + 2)You have cup of cornmeal in your cupboard. A recipe for muffins calls for
cup of cornmeal. How much cornmeal would you have left if you made the
muffins?
Find the square of 7-2v10.
Answer:
89 - 28v10 = 0.456
Step-by-step explanation:
(7-2v10)² = 7² - 2*7*2v10 + (2v10)²
(7-2v10)² = 49 -28v10 + 40
(7-2v10)² = 89 - 28v10
Prove, using the definition of the derivative, that if f(x) = cos (x), then f'(x) = -sinx.
The derivative of a function represents the rate of change of the function with respect to its variable. This rate of change is described as the slope of the tangent line to the curve of the function at a specific point. The derivative of the cosine function can be found by applying the limit definition of the derivative to the cosine function.
\(f(x) = cos(x) then f'(x) = -sin(x)\).
Let's proceed with the proof. Definition of the Derivative: The derivative of a function f(x) at x is defined as the limit as h approaches zero of the difference quotient \(f(x + h) - f(x) / h\) if this limit exists. Using this definition, we can find the derivative of the cosine function as follows:
\(f(x) = cos(x) f(x + h) = cos(x + h)\)
Now, we can substitute these expressions into the difference quotient: \(f'(x) = lim h→0 [cos(x + h) - cos(x)] / h\)
We can then simplify the expression by using the trigonometric identity for the difference of two angles:
\(cos(a - b) = cos(a)cos(b) + sin(a)sin(b)\)
Applying this identity to the numerator of the difference quotient, we obtain:
\(f'(x) = lim h→0 [cos(x)cos(h) - sin(x)sin(h) - cos(x)] / h\)
We can then factor out a cos(x) term from the numerator:
\(f'(x) = lim h→0 [cos(x)(cos(h) - 1) - sin(x)sin(h)] / h\)
We can then apply the limit laws to separate the limit into two limits:
\(f'(x) = lim h→0 cos(x) [lim h→0 (cos(h) - 1) / h] - lim h→0 sin(x) [lim h→0 sin(h) / h]\)
The first limit can be evaluated using L'Hopital's rule:
\(lim h→0 (cos(h) - 1) / h = lim h→0 -sin(h) / 1 = 0\)
Therefore, the first limit becomes zero:
\(f'(x) = lim h→0 - sin(x) [lim h→0 sin(h) / h]\)
Applying L'Hopital's rule to the second limit, we obtain:
\(lim h→0 sin(h) / h = lim h→0 cos(h) / 1 = 1\)
Therefore, the second limit becomes 1:
\(f'(x) = -sin(x)\)
Thus, we have proved that if \(f(x) = cos(x), then f'(x) = -sin(x)\).
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Please tell me someone know I have to go back to school tomorrow
An equation for the function g(x) when g(x) = f(-x) is g(x) = -x/3 - 6, which is shown in the graph attached below.
What is a reflection?In Mathematics, a reflection can be defined as a type of transformation which moves every point of the geometric figure by producing a flipped, but mirror image of the geometric figure.
In Geometry, a reflection across the y-axis (y = x) is given by this transformation rule (x, y) → (-x, y). This ultimately implies that, a reflection over the y-axis would maintain the same y-coordinate while the sign of the x-coordinate changes from positive to negative or negative to positive.
By reflecting the given function across the across the y-axis (y = x), we have the following:
f(x) = x/3 - 6
g(x) = f(-x)
g(x) = -x/3 - 6.
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Dan has 3 fish. Mary has 2 fewer than 4 times the number of fish Dan has.
4 times as many = 4 x 3 = 12
2 fewer than that = 12-2 = 10
She has 10 fish
Answer:
10????
Step-by-step explanation: