Can you please help !!!!!!!!!!!!

Can You Please Help !!!!!!!!!!!!

Answers

Answer 1

Answer:

slope  =  0

Step-by-step explanation:

\(m=\frac{change in y}{change in x}\)

\(m=\frac{4-4}{2-1}\)

\(\frac{0}{1}\)

Divide  0  by  1 .

m  =  0

good luck, hope this helps :)


Related Questions

In performing hypothesis tests about the population mean, if the population standard deviation is not known, a t test can be used to test the mean if _________________.

a. n is small

b. the sample is random

c. the population mean is known

d. the population is normally distributed

e. the population is chi-square distributed.

Answers


In performing hypothesis tests about the population mean, a t-test can be used if the population standard deviation is not known and the sample is random.

The conditions of a random sample and unknown population standard deviation are necessary for the t-test to be applicable.

When conducting hypothesis tests about the population mean, if the population standard deviation is unknown, the t-test is appropriate to use. The t-test is specifically designed for situations where the population standard deviation is not known and must be estimated from the sample. By using the sample data, the t-test calculates a test statistic called the t-value, which is used to determine the statistical significance of the mean difference.

However, it is important to note that in addition to the unknown population standard deviation, the sample must also be random for the t-test to be valid. Random sampling helps ensure that the sample is representative of the population, which is crucial for making accurate inferences. Therefore, options (b) "the sample is random" and (d) "the population is normally distributed" are the correct conditions for using a t-test when the population standard deviation is unknown.

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When multiplying fractions do you multiply the denominator.

Answers

Multiply the numerator and the denominator

Hope this helps!

Answer:

Yes

Step-by-step explanation:

When multiplying fractions you do both the numerator and denominator.

however, when adding or subtracting fractions the denominator needs to be the same for both fractions before you start

a  <----- numerator

---

b <---- denominator

What is the justification for each step in the solution of the equation 2/3x-1/3=2(x+2)

Answers

Answer:

-13/4

Step-by-step explanation:

Jenny buys four items that cost $1. 43, $3. 72, $2. 21, and $5. 60. What is a reasonable estimate of the total cost?

Answers

Reasonable estimate of the total cost is $10.

We know that Reasonable estimate does not exceed the original numbers.

We can round down the number to the nearest number to estimate the answer.

Given that Jenny buys four items that cost $1.43, $3.72, $2.21 and $ 5.60 which estimates to $0 , $0, &0, $10.00 respectively.

Therefore total cost of estimated numbers will be

$0 + $0 + $0 + $10.00 = $10

Hence reasonable estimate of the total cost is $10.

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In a household,the metre reading for water at the end of june was 7848000litres.The metre reading at the end of July was 7908000 litres. The household was charged for consumption at the following rates:The first 10000 litres at #1 per litre.The remaining #1.50 per litre. Calculate;1The consumption at the end of July ,the total charge for the consumption​

Answers

Answer:

85000

Step-by-step explanation:

7908000 - 7848000 = 60000

The first 10000 litres is #1 per litre or 10000

The remaining 5 litres is 50000 * 1.5 = 75000

Would 7/2 be enlarged reduced or preserved

Answers

Answer:

The scale factor 7/2 would enlarge it because it is getting 3 1/2 time larger than the oringanl size

Step-by-step explanation:

CAYB is a quadrilateral

CA= 3a
CB= 6b
BY= 5a-b

X is the point on AB such that AX:XB= 1:2

Prove that CX = 2/5 CY

CAYB is a quadrilateral CA= 3aCB= 6bBY= 5a-bX is the point on AB such that AX:XB= 1:2Prove that CX =

Answers

Answer:

see explanation

Step-by-step explanation:

CY = CB + BY

     = 6b + 5a - b

     = 5a + 5b

---------------------

CX = CA + AX

     = CA + \(\frac{1}{3}\) AB , find AB

AB = AC + CB

     = - 3a + 6b

     = 6b - 3a

Thus

CX = CA  + \(\frac{1}{3}\) AB

      = 3a + \(\frac{1}{3}\)(6b - 3a)

      = 3a + 2b - a

      = 2a + 2b

---------------------

and

\(\frac{2}{5}\) CY

= \(\frac{2}{5}\) (5a + 5b)

= 2a + 2b = CX

Hence CX = \(\frac{2}{5}\) CY ⇒ Proven

 

Let h(x)=f(x)−g(x). If f(x)=9x2 and g(x)=8x, what is h′(−5)?
Do not include "h′(−5)=" in your answer. For example, if you found h′(−5)=7, you would enter 7

Answers

Answer:

Step-by-step explanation:

I let heaza fa) - 90) it fra) - 9zand g(=84

what is hls) = ?

h(x) = ax - 8x

dca-cd an

da

da

din

xa nant

da

da

- 1 - 3 , 지

9(2

Equations are mathematical elaboration containing two algebraic expressions on both sides of an 'equal to (=)' sign. It shows the relationship of equality between the representation written on the left side with the expression written on the right side.

In every equation in math, we have, L.H.S = R.H.S (left hand side = right hand side). Equations can be sorted to find the value of an unknown variable representing an unknown quantity. If there is no 'equal to' symbol in the statement, it means it is not an equation.

It will be measured as an expression. You will learn the difference between equation and expression in the later section of this definition.

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Suppose we estimate the following regression: yt = β1 + β2x2t +
β3x3t + ut. Suppose the variance of ut is related to a known
variable zt as follows: Var(ut) = σ^2(zt). How would you transform
the

Answers

To transform the regression equation, you would divide both sides of the equation by the square root of Var(ut), which is σ√(zt). This transformation helps in obtaining the transformed regression coefficients and standard errors that account for the heteroscedasticity in the error term.

When the variance of the error term (ut) is related to a known variable (zt), it implies the presence of heteroscedasticity in the regression model. Heteroscedasticity means that the variability of the error term is not constant across different levels of the independent variables.

To address this issue, we can transform the regression equation by dividing both sides by the square root of the variance of the error term, which is σ√(zt). This transformation is known as the weighted least squares (WLS) estimation.

By dividing both sides of the equation, we can obtain the transformed regression equation with the error term divided by its standard deviation. This transformation accounts for the heteroscedasticity by giving different weights to the observations based on the variability of the error term. It allows for a more appropriate estimation of the regression coefficients and standard errors, as it gives more weight to observations with smaller error variances and less weight to observations with larger error variances.

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Find the volume of the rectangular prism

Find the volume of the rectangular prism

Answers

Answer:

336

Step-by-step explanation:

V=whl=8·7·6=336

f(-3)=x^2+4

just need help with this

Answers

Step-by-step explanation:

f(-3)=(-3)^2+4

=9+4

=13

hope it helps u dear friend

Answer:

Step-by-step explanation:

Given

f(x) = x² + 4

Now

f(- 3) = (-3)² + 4

       = 9 + 4

       = 13

hope it helps :)

Find the absolute maximum and absolute minimum values of f on the given interval.
f(t) = 2 cos (t) + sin (2t), [0, π/2]

absolute minimum value?
absolute maximum value?

Answers

The absolute maximum and absolute minimum values of f on the given interval f(t) = 2 cos (t) + sin (2t), [0, π/2] is 3√3/2 and 0 respectively.

Given :Y = 2cost + sin2t

differentiate wrt t

dy/dt = -2sint +2cos2t = 0

sint = cos2t = 1 - 2sin²t

2sin²t + sint -1 = 0

2sin²t + 2sint - sint - 1 = 0

2sint (sint +1 ) -(sint+1) = 0

sint = 1/2 and -1

but  t € [ 0, π/2 ] so, sint = 1/2 = sinπ/6

t = π/6

again, differentiate wrt t

d²y/dt² = -2cost -4sin2t

put t = π/6

d²y/dt² = -2× √3/2 - 4×√3/2 < 0

hence, d²y/dt² < 0

So, at t = π/6 function gain, Maxima

now,

f(0) = 2cos(0) +sin2(0) = 2

f(π/6) = 2cos(π/6) + sin2(π/6) = 3√3/2

f(π/2) = 2cos(0) + sin2(π/2) = 0

hence , absolute maximum = 3√3/2

and absolute minimum = 0

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10. Write as a fraction in its simplest form. show all your working.​

10. Write as a fraction in its simplest form. show all your working.

Answers

Answer:

419/1000

Step-by-step explanation:

\( \frac{(0.419 \times 1000)}{(1 \times 1000)} = \frac{419}{1000} \)

Look at this graph What is the equation of the line in point slope form? Use the red point in your equation. Write your answer using integers, proper fractions, and improper fractions in simplest form. y - ____ = ____ (x - ____)

Look at this graph What is the equation of the line in point slope form? Use the red point in your equation.

Answers

EXPLANATION

Given the line on the graph, we need to find the slope and the y-intercept.

Considering two ordered pairs, as for instance (x₁,y₁)=(50,-90) and (x₂,y₂)=(80,90)

The slope-equation is:

\(\text{Slope}=\frac{(y_2-y_1)}{(x_2-x_1)}\)

Replacing terms:

\(\text{Slope}=\frac{(90-(-90))}{(80-50)}=\frac{180}{30}=\frac{18}{3}=6\)

The point-slope form of the line is:

y-y₁= m(x-x₁)

Finally, we need to represent as a point-slope form considering either one ordered pair, as for instance, (x₁,y₁)=(50,-90)

y-(-90) = 6(x-50) [Simplifying terms]

y + 90 = 6(x-50) [ANSWER]

Which of the following hold for all random variables X and Y?
A• Var (2X) = 4Var (X)
B• Var (X + 10) = Var (X)
C• Var (X + Y) = Var (X) + Var (Y)
D Var (3X + 3Y) = 9Var (X + Y)

Answers

Among the given options, the correct statement is: C. Var (X + Y) = Var (X) + Var (Y).

This statement is known as the addition rule for variance and holds true for all random variables X and Y, regardless of their specific distributions.

To understand why this statement is true, let's briefly discuss the concept of variance. Variance measures the dispersion or spread of a random variable's values around its expected value (mean). Mathematically, variance is defined as the average of the squared deviations of the random variable from its mean.

Now, let's prove statement C:

Var (X + Y) = E[(X + Y - E[X + Y])^2] (definition of variance)

= E[(X + Y - E[X] - E[Y])^2] (linearity of expectation)

Expanding the square term:

mathematica

Copy code

       = E[(X - E[X])^2 + 2(X - E[X])(Y - E[Y]) + (Y - E[Y])^2]

By linearity of expectation, we can split this expression into three parts:

scss

Copy code

       = E[(X - E[X])^2] + 2E[(X - E[X])(Y - E[Y])] + E[(Y - E[Y])^2]

       = Var(X) + 2Cov(X, Y) + Var(Y)     (definition of variance and covariance)

Note that Cov(X, Y) represents the covariance between X and Y, which measures the extent to which X and Y vary together. However, the given options do not mention anything about the covariance between X and Y, so we cannot determine its value.

Therefore, statement C is correct because it expresses the addition rule for variance, which states that the variance of the sum of two random variables is equal to the sum of their individual variances.

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For what types of associations are regression models useful?Choose the correct answer below.
A. Non-linear
B. Linear
C. Both linear and non-linear
D. For all types of associations

Answers

Option C. Regression models can be used for both linear and non-linear associations, but they are particularly well-suited for linear relationships.

Regression models are useful for modeling the relationship between variables, particularly for predicting the value of one variable based on the value of another.

Linear regression models are used for linear associations, while non-linear regression models are used for non-linear associations. However, even for non-linear associations, linear regression models can be useful for approximating the relationship between variables in certain cases. Nonetheless, in general, non-linear regression models are more appropriate for non-linear associations.

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Suppose A Monument in Texas casts a shadow of 285 feet. At the same time, a nearby tourist, who is 5 feet tall casts a 2.5 foot shadow. How tall is the Monument?

Answers

The height of the monument is 570 feet. Since the shadow of the monument and the shadow of the tourist are cast at the same time, their angles of elevation are the same.

To solve this problem, we need to use the concept of similar triangles. We can set up a proportion: (height of Monument) / (length of Monument's shadow) = (height of tourist) / (length of tourist's shadow)

Let x be the height of the Monument. Then we have:

x / 285 = 5 / 2.5

Cross-multiplying, we get:

2.5x = 5 * 285

Simplifying, we get:

x = 570

Therefore, the Monument is 570 feet tall.

To find the height of the monument, we can use the concept of similar triangles. Since the shadow of the monument and the shadow of the tourist are cast at the same time, their angles of elevation are the same.

Set up a proportion using the height and shadow length of the tourist and the monument:

(height of monument) / (shadow of monument) = (height of tourist) / (shadow of tourist)

Let x represent the height of the monument. Then:

x / 285 = 5 / 2.5

Now, solve for x:

x = (5 / 2.5) * 285
x = 2 * 285
x = 570 feet

The height of the monument is 570 feet.

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Ray is buying some ginger roots to brew some fresh ginger ale. The price of the ginger roots is GG, and Ray has a coupon for 10% percent off.
The expression 0.9G represents the price Ray pays for the ginger roots after using the coupon.
What does 0.9 represent in this context?

Answers

Answer:

It represents the price that ray is actually paying. Instead of paying for 100% of the price, he is now only paying for 90%

Step-by-step explanation:

What is the graph of a system of linear equations in two variables which has exactly one solution?

Answers

Consistent independent systems are linear systems that have only one possible solution. When two lines are independent they are distinct and consistent when two lines intersect.

What in mathematics is a linear equation?

A linear equation is a first-order (linear) term plus a constant in the algebraic form y=mx+b, where m is the slope and b is the y-intercept. Sometimes, the aforementioned is referred to as a "linear equation of two variables," where x and y are the variables.

What makes an equation linear?

When a linear equation is graphed, it always produces a straight line since each term in the equation has an exponent of 1. This is the basis for the term "linear equation" being used to describe it.

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i need help quick!! i need steps please. i dont understand it
will mark brainliest.

i need help quick!! i need steps please. i dont understand itwill mark brainliest.

Answers

Answer:

Its just a slide 2 up and 3 to the right it seems. It can be a mirror because in never changes the shape. as of rules i dont understand want you need please comment and ill let you know

Step-by-step explanation:

It is not a rotation, a mirror a flip or anything like that i think its only slides.

I didnt se this before every slide counts as 2 so its 4 up and 6 to the right

Yep he or she is right have a nice day

Brad made a scale drawing of a rectangular room in his house. The actual length of the room is 12 4/5 ft. The scale used to make the drawing was 1/4 in = 1 ft. What is the length, in inches, of the room in the drawing?

(show work pls)

Answers

Answer:

3.2

Step-by-step explanation:

12 4/5 times 1/4= 3 1/5 or 3.2

For a normal distribution, the skewness and kurtosis measures are as follows: O A. 1 and 2 B. 0 and 3. OC. O and 0. OD. 1.96 and 4.

Answers

For a normal distribution, the skewness and kurtosis measures are as follows: Option B. 0 and 3.

Skewness is a measure of the asymmetry of a probability distribution. Skewness is a measure of the degree of asymmetry in the probability distribution of a random variable around its mean.

When the skewness is 0, the normal distribution is symmetrical.

Kurtosis is a measure of the degree of peakiness, or flatness, of a probability distribution.

For a normal distribution, kurtosis equals 3. In comparison to the normal distribution, distributions with kurtosis greater than 3 have a more pointed peak and longer tails, while distributions with kurtosis less than 3 have a less pointed peak and shorter tails.

Therefore, for a normal distribution, the skewness and kurtosis measures are 0 and 3, respectively. Hence, the correct option is B. 0 and 3.

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The following problem considers the integral ∫10sinx2dx
Using a known series, write the first 3 non-zero terms of the Maclaurin series for sinx2.
Approximate integral ∫10sinx2dx using the first two terms of the series.
Give an upper bound on the error in your estimate. You must use the Alternating Series Estimate Theorem or Tayor's Inequality to determine the error bound.

Answers

We can say that our approximation of the integral using the first two

terms of the series is:

\(\int 1^0sin(x^2)dx = 1/3 + 0.024\)

To find the Maclaurin series for sin(x^2), we can use the Maclaurin series

for sin(x) and substitute x^2 for x. Recall that the Maclaurin series for sin(x) is:

\(sin(x) = x - (x^3/3!) + (x^5/5!) - (x^7/7!) + ...\)

Substituting \(x^2\) for x, we get:

\(sin(x^2) = x^2 - (x^6/3!) + (x^10/5!) - (x^14/7!) + ...\)

To find the first 3 non-zero terms, we can simply take the first three terms of this series:

To approximate the integral \(\int 1^0sin(x^2)dx\)using the first two terms of the series, we can integrate the series term by term. This gives:

\(\int 1^0sin(x^2)dx ≈ \int 1^0(x^2 - (x^6/3!))dx\)

\(≈ x^3/3 - (x^7/7!)][1,0]\)

≈ 1/3 - (1/7!)(0 - 0)

≈ 1/3

To find an upper bound on the error in our estimate, we can use Taylor's

Inequality or the Alternating Series Estimate Theorem.

Let's use Taylor's Inequality, which states that the error of an

approximation using the first n terms of a Taylor series is bounded by:

\(|f(x) - Pn(x)| \leq M(x-a)^(n+1)/(n+1)!\)

where f(x) is the true function, Pn(x) is the nth degree Taylor polynomial,

M is the maximum value of the (n+1)th derivative of f(x) on the interval

[a,x], and a is the center of the Taylor series.

In this case, our approximation is:

\(P2(x) = x^2 - (x^6/3!)\)

Our interval is [0,1] and our function is \(f(x) = sin(x^2).\)

To find M, we need to find the (n+1)th derivative of sin(x^2) and its

maximum value on the interval [0,1].

The (n+1)th derivative of \(sin(x^2)\) is:

\(d^{(n+1)} /dx^{(n+1)} sin(x^2) = sin(x^2) \times Pn(x) + Qn(x)\)

where Pn(x) and Qn(x) are polynomials of degree n and n-1, respectively.

The maximum value of this derivative on the interval [0,1] is:

\(|sin(x^2) \times Pn(x) + Qn(x)| \leq |sin(x^2)| \times |Pn(x)| + |Qn(x)|\)

\(\leq 1 \times (1^2 + 1/3!) + 1/2!\)

≤ 1.168

Thus, our upper bound on the error is:

\(|f(x) - P2(x)| \leq M(x-a)^{(n+1)} /(n+1)!\)

\(\leq 1.168(1-0)^{(3+1)} /(3+1)!\)

≈ 0.024

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If f(1) = T and f(n) = 4f(n − 1) then find the value of f(5).

If f(1) = T and f(n) = 4f(n 1) then find the value of f(5).

Answers

Answer: sorry i have not learnd that yet

Step-by-step explanation:

Answer:I need the answer please

Step-by-step explanation:

Can someone help me for problem 23

Can someone help me for problem 23

Answers

A. The slope of the graph is -2
B. I’m sorry I didn’t have paper
C. The y-intercept
Can someone help me for problem 23

HELLO IS ANYONE GOOD AT MATH IF SO PLEASE ANSWER THIS IS DUE TONIGHT
Draw where the dots go on the graph please

HELLO IS ANYONE GOOD AT MATH IF SO PLEASE ANSWER THIS IS DUE TONIGHT Draw where the dots go on the graph

Answers

this is how you graph it
HELLO IS ANYONE GOOD AT MATH IF SO PLEASE ANSWER THIS IS DUE TONIGHT Draw where the dots go on the graph

Graph the equation y=-x^(2)+6x-8 on the accompanying set of axes. You must plot 5 points including the roots and the vertex. Using the graph, determine the equation of the axis of symmetry. Click to plot points. Click points to delete them.

Answers

The equation of the axis of symmetry for the graph y = -x^2 + 6x - 8 is x = 3.

To graph the equation y = -x^2 + 6x - 8, we need to plot five points including the roots and the vertex. The roots can be found by setting y = 0 and solving for x. To find the vertex, we can use the formula x = -b/2a, where a, b, and c are coefficients of the quadratic equation in the form ax^2 + bx + c.

The equation y = -x^2 + 6x - 8 can be factored as y = -(x - 4)(x - 2). This gives us the roots x = 4 and x = 2. Substituting these values into the equation, we get y = 0 when x = 4 and x = 2.

To find the vertex, we use the formula x = -b/2a. In this case, a = -1 and b = 6, so the vertex occurs at x = -6/(2*(-1)) = -6/(-2) = 3. Substituting x = 3 into the equation, we find y = -3^2 + 6(3) - 8 = -9 + 18 - 8 = 1.

Now, let's plot these points on the graph. The five points we need to plot are (2, 0), (4, 0), and the vertex (3, 1).

To determine the equation of the axis of symmetry, we take the x-coordinate of the vertex, which is 3. Therefore, the equation of the axis of symmetry is x = 3.

Graphing the equation y = -x^2 + 6x - 8 and plotting the points, we obtain a downward-opening parabola that intersects the x-axis at x = 2 and x = 4, with the vertex at (3, 1).

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Graph the equation y=-x^(2)+6x-8 on the accompanying set of axes. You must plot 5 points including the

2. Hilary can read 560 words in 7 minutes.
How many words can Hilary read in
1 minute?



WRITE UR EQUATION!!


PLS HELP ME WITH THIS QUICK!

Answers

Answer:

80

Step-by-step explanation:

560/7=80

Please help me :):)):):

Please help me :):)):):

Answers

Answer:

12

Step-by-step explanation:

5^2 + b^2 = 13^2

25 + b^2 = 169

169-25= 144

take the square root of 144

answer: 12

Identify the highlighted part of circle O shown below

Central angle
Secant
Inscribed angle
Chord

Identify the highlighted part of circle O shown below Central angle Secant Inscribed angle Chord

Answers

Answer:

Chord

Step-by-step explanation:

Notice that the highlighted part is the line segment that joins the points J and E on the circle, which is known as a chord.

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