Ri’Hanna has n nickels. Shania has 4 times as many nickels as Ri’Hanna has. Write an expression for the total number of nickels Ri’Hanna and Shania have. SImplify the Expression.

Answer:

The roots of the polynomial equation in this case would be the intersection of the 2 polynomial functions.  which are at  x = 4 and x = -3

Step-by-step explanation:

The roots are found by finding the x-values of the intersections of these two cubic polynomial functions.

We could try solving algebraically, but you have the graph.

Answer:

The point estimate for estimating the true proportion of employees who prefer that plan is 0.436

Step-by-step explanation:

A confidence interval has two bounds, a lower bound and an upper bound.

A confidence interval is symmetric, which means that the point estimate used is the mid point between these two bounds, that is, the mean of the two bounds.

In this problem, we have that:

Lower bound: 0.366

Upper bound: 0.506

Point estimate:

(0.366 + 0.506)/2 = 0.436

The point estimate for estimating the true proportion of employees who prefer that plan is 0.436

Answer:

[tex]\hat p = \frac{0.366+0.506}{2}= 0.436[/tex]

And the point of estimate for the proportion of  employees who prefer plan is on this case 0.436 or 43.6%.

Step-by-step explanation:

We define the parameter of interest as the proportion of employees who prefer plan p and we want to estimate this true parameter

The confidence interval for the this proportion is given by the following formula:  

[tex]\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}[/tex]

After calculate the 95% confidence interval we got (0.366, 0.506)

We can obtain the best estimate for the proportion of employees who prefer plan like this:

[tex]\hat p =\frac{Upper +Lower}{2}[/tex]

Where Upper and Lower represent the limits for the confidence interval and replacing we got:

[tex]\hat p = \frac{0.366+0.506}{2}= 0.436[/tex]

And the point of estimate for the proportion of  employees who prefer plan is on this case 0.436 or 43.6%.

The margin of error can be estimated using the fact that this confidence interval is symmetrical and we got:

[tex]ME=\frac{Upper-Lower}{2}= \frac{0.506-0.366}{2}=0.07[/tex]

Answer:

2x^2 + x -1

Step-by-step explanation:

-7x + 5 - 2x^2 + 8x -6

2x^2 + x -1

Answer:

28 you have to do it from left to right

Answer:

13-5=8

3x8=24

24-2=22

22+6=28

28 is your answer

Step-by-step explanation:

Answer:

choose choice C.

Step-by-step explanation:

many vertical lines can cross this graph more than once, which defies the definition of a function.

Answer:

c) A vertical line placed on the graph could intersect more than one point

Step-by-step explanation:

if you did the vertical line test, you would see that there would be more than one point per value.

hope i helped:) !!!

brainliest ??

Answer:

m/6-8 =m/58

Step-by-step explanation:

Using the midpoint formula, the coordinates of point B are determined by setting up equations with the known coordinates of point A and midpoint M. Solving these equations yields the x-coordinate of B as -10 and the y-coordinate as 6, making the coordinates of point B (-10, 6).

The question is asking to determine the coordinates of point B if M(-6,8) is the midpoint of AB and A has coordinates (-2,10). To find the coordinates of B, we use the midpoint formula which states that the midpoint M(x,y) is given by M = ((x1 + x2)/2, (y1 + y2)/2) where (x1, y1) and (x2, y2) are the coordinates of points A and B respectively. Since we know the coordinates of A and M, we can set up equations to solve for the coordinates of B.

To find the x-coordinate of B, we set up the equation -6 = (-2 + xB)/2 which yields xB = -10. For the y-coordinate, we use the equation 8 = (10 + yB)/2 which gives us yB = 6. Therefore, the coordinates of point B are (-10, 6).

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Answer:

  8

Step-by-step explanation:

The lateral area of a cone is ...

  LA = (π/2)ds

where d is the diameter, and s is the slant height.

The area of this tower roof is about ...

  LA = (π/2)(12 ft)(13 ft) = 78π ft² ≈ 245 ft²

About 245/32 = 7.7 bundles of shingles will be required for coverage.

You should buy 8 bundles of shingles to cover the roof.

Answer:

It'll be -0.25

Step-by-step explanation:

Notice how it is to the left of zero, anything to the left of zero is negative. With that in mind, we can eliminate A. The half mark between 0 and -1 represents 0.50, and since it goes by quarters, the E is at the first quarter, which is 0.25. Hopefully this helps!

THE COMPLETE QUESTION IS:

Which dot plot shows a sample that is most representative of the number of pets in a household?

A. A dot plot going from 0 to 6. There are 3 dots above 0, 5 dots above 1, 4 dots above 2, 3 dots above 3, 2 dots above 4, 0 dots above 5, and 1 dot above 6.

B. Adot plot going from 0 to 6. There are 2 dots above 1, 3 dots above 2, and 1 dot above 5.

C. A dot plot going from 0 to 6. There is 1 dot above 0, 2 dots above 1, 1 dot above 2, 1 dot above 3, 1 dot above 4, 1 dot above 5, 2 dots above 6.

D. A dot plot going from 0 to 6. There is 1 dot above 1, 2 dots above 2, 3 dots above 3, 2 dots above 4, 1 dot above 5.

Answer:

A is the correct option

Step-by-step explanation:

A. A dot plot going from 0 to 6. There are 3 dots above 0, 5 dots above 1, 4 dots above 2, 3 dots above 3, 2 dots above 4, 0 dots above 5, and 1 dot above 6.

A has 3+5+4+3+2+0+1 = 18 dots

The rest are not up to 18.

The best graphical representation of the number of pets in a household is: A dot plot going from 0 to 6. There are 3 dots above 0, 5 dots above 1, 4 dots above 2, 3 dots above 3, 2 dots above 4, 0 dots above 5, and 1 dot above 6.

A graph can be defined as the graphical representation of data (information) on both the horizontal and vertical lines, which are commonly called the x-axis and y-axis respectively.

In Mathematics, there are different types of graph and these include:

A dot plot refers to a type of graph which comprises small data points that are plotted on a simple histogram-like graph. Thus, the number of pets in a household should be represented by using a dot plot with its value ranging from 0 to 6.

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Answer:

One solution.

Step-by-step explanation:

A linear line only goes one way, and thus, two lines can only meet at one point.

That is unless, the linear equations are both the same, then they will have infinite solutions.

But what you're asking is if they're different so no, you cannot have two solutions for a system of two linear equations.

Answer:

0

Step-by-step explanation:

Two different solutions means the two equations aren't consistent - there's no unique solution that solves the whole system. Two lines can meet at at most one point, so in this case, no solution to the first equation will be a solution to the second. The system has 0 solutions.

Answer:

-7/2

Step-by-step explanation:

This question is a word problem.

Step 1: interpretation the question

Let's assume the number is x;

X×7 – 1 = X×5 – 8

7x - 1 = 5x - 8

Step 2. Solve the equation for the unknown.

7x - 1 = 5x - 8

Take like terms together

7x - 5x = - 8 +1

2x = -7

Divide both sides by 2

x = -7/2

The answer is -7/2

Answer: C AND E

Step-by-step explanation:

Option D is correct, Angle c and Angle e are vertical angles.

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

Given that Line x and line z are straight lines.

Lines x, z, and y intersect to form 5 angles. From top left, clockwise, the angles are: a: right angle, b, c, d, e.

Vertical angles are opposite to each other and not adjacent.

In this case, angle c and angle e are opposite to each other, as they are on opposite sides of the intersection between lines y and z, and they are not adjacent to each other. Therefore, they must be vertical angles.

Hence, Option D is correct, Angle c and Angle e are vertical angles.

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Answer:

[tex]\huge\boxed{V=576\ ft^3}[/tex]

Step-by-step explanation:

[tex]\text{The formula of a volume of a prism with dimensions}\ l\times w\times h:\\\\V=lwh.\\\\\text{We have}\\\\l=8ft,\ w=6ft,\ h=12ft.\\\\\text{Substitute:}\\\\V=(8)(6)(12)=576(ft^3)[/tex]

Answer: This means that the salaries of their marketing professionals are not closely related to their job titles. In further explanation, this shows that a professional with a higher job title, may be paid a lower salary when compared to a professional with a lower job title.

A 0.85 R-Squared shows that the points are far from the trend lines. From this, we can assume that the marketing professionals are paid base on commission on sales, and not base on job position.

Step-by-step explanation: R-Squared is a measure used in statistics, to represent how much proportion of the dependent variables that is explained by the independent variables. A high value of R^2 shows a very low correlation between the dependent and independent variables, while a low value of R^2 shows that the dependent and independent variables are closely related. The R-Squared value are a measure of percentage value.

Answer:

C . M2x2 is a vector space

Step-by-step explanation:

According to the definition, the each element in a vector spaces is a vector. So, 2×2 matrix cannot be element in a vector space since it is not even a vector.

The set of all ordered triples of real numbers is called 3‐space, denoted R 3 (“R three”). See Figure . ... Vectors in R 3 are called 3‐vectors (because there are 3 components), and the geometric descriptions of addition and scalar multiplication given for 2‐vectors also carry over to 3‐vectors.

Since every polynomial of degree up to 2 is also a polynomial of degree up to 3, P2 is a subset of P3. And we already know that P2 is a vector space, so it is a subspace of P3.

With addition, the set of polynomials of degree 2 almost form a vector space, but there are some problem. The first one, is that the zero vector, i.e. the zero polynomial is not of degree 2. ... If you really need them to form a vector space, then you should consider the set of all polynomials of degree at most 2.

Answer:

Its the fourth graph

Step-by-step explanation:

i got it right

Answer: the 4th one

Step-by-step explanation:

i just did this

Answer:

-x^2 + 4x + 6

Step-by-step explanation:

(f-g)(x) = f(x) - g(x) =

4x + 1 - (x^2 -5) =

-x^2 +4x + 6

Answer:

B

Step-by-step explanation:

you multiply the numbers and remember the little square is 90

The area of new parallelogram is 78in2

The original parallelogram has a base of 18 inches and a height of 10 inches. Therefore, its area is 18 x10 = 180 square inches.If the height is decreased by 1 inch and the base is decreased by 2 inches, the new base will be 18 - 2 = 16 inches and the new height will be 10 - 1 = 9 inches. So, the area of the new parallelogram will be 16 x 9 = 144 square inches.Therefore, the answer is c. 78in2.

Here's a breakdown of the reasoning for each option:a. 108in2: This is incorrect because it's smaller than the area of the original parallelogram, even though both the base and height are decreased.b. 104in2: 

This is also incorrect because it's still larger than the area of the new parallelogram.c. 78in2: 

This is the correct answer, as calculated above.d. 84 in2: This is incorrect because it's closer to the area of the original parallelogram than the new one.

Answer:

3 square roots of 19

Step-by-step explanation:

a squared + b squared = c squared

5 squared + b squared = 14 squared

25 + b squared = 196 squared

b squared = 171

b = square root of 171

b = 3 square roots of 19

hi

If your wall is straight , then. you have  a rectangular traingle.

As Pythagoras tells us :   wall² = ladder²- ground distance²

                                        wall² = 14²- 5²

                                         wall²   = 196 -25

                                        wall² = √171≈13,07

Answer:

h=6

Step-by-step explanation:

the formula for a trapezoid’s area is to multiply the bases (a and b) by the height of the trapezoid, then divide it all by 2.

so typed out, that would look like:

((a+b) h) / 2

and in the case of this problem:

((22) h) / 2 = 66

so just go ahead and solve it algebraically from there and you’re good!

Answer:

9

Step-by-step explanation:

it's 9 because you always look in the middle for the mean

Answer:

Option D is correct.

Rejecting the null hypothesis means that;

There is sufficient evidence to support the claim that the mean is greater than 32 miles per gallon.

Step-by-step explanation:

For hypothesis testing, the first thing to define is the null and alternative hypothesis.

In hypothesis testing, especially one comparing two sets of data, the null hypothesis plays the devil's advocate and usually takes the form of the opposite of the theory to be tested. It usually contains the signs =, ≤ and ≥ depending on the directions of the test. It usually maintains that, with random chance responsible for the outcome or results of any experimental study/hypothesis testing, its statement is true.

The alternative hypothesis usually confirms the theory being tested by the experimental setup. It usually contains the signs ≠, < and > depending on the directions of the test. It usually maintains that significant factors other than random chance, affect the outcome or results of the experimental study/hypothesis testing and result in its own statement.

For this question, Carter Motor Company claims that its new sedan, the Libra, will average better than 32 miles per gallon in the city. And since this is talking distance covered per gallon of fuel, better means that the new sedan will average more than 32 miles per gallon.

So, the null hypothesis negating this claim would be that there isn't significant evidence to conclude that the average of the new sedan will be better or greater than 32 miles per gallon.

That is, the new average will be less than or equal to 32 miles per hour.

And the alternative hypothesis will confirm the claim that there is significant evidence to conclude that the average of the new sedan will be better or greater than 32 miles per gallon.

Mathematically,

The null hypothesis is represented as

H₀: μ ≤ 32 miles per gallon

The alternative hypothesis is given as

Hₐ: μ > 32 miles per gallon

So, after the hypothesis test has been conducted, rejecting the null hypothesis means accepting the alternative hypothesis and its statement that there is significant evidence to conclude that the average of the new sedan will be better or greater than 32 miles per gallon.

Hence, option D is correct.

Hope this Helps!!!

The conclusion of the hypothesis test indicates that there is sufficient evidence to support the claim that the mean fuel efficiency of the new Libra sedan is greater than 32 miles per gallon.

From the noun hypothesis testing conducted, the conclusion drawn is to reject the null hypothesis. In non-technical terms, rejecting the null hypothesis means that based on the data collected and analyzed, there is sufficient statistical evidence to support the claim that contrary to the null hypothesis, the average (or 'mean') miles per gallon of the new Libra sedan is indeed greater than 32 miles per gallon. These results should confirm Carter Motor Company's assertions about their vehicle's fuel efficiency.

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Answer:

Square root of 1040

Decimal form - 32.249

Step-by-step explanation:

The distance between the endpoints (3, 24) and (7, 56) will be 32.25 units.

Let one point be (x, y) and another point be (h, k).

Then the distance between the points will be

D² = (x - h)² + (y - k)²

The two endpoints are given below.

(3, 24) and (7, 56)

Then the distance between the endpoints (3, 24) and (7, 56) will be

D² = (7 - 3)² + (56 - 24)²

D² = 4² + 32²

D² = 16 + 1024

D² = 1040

D = 32.25 units

The distance between the endpoints (3, 24) and (7, 56) will be 32.25 units.

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We have been given an image of a trapezoid. We are asked to find the measure of angle M and N.

We know that bases of trapezoid are parallel and the two angles between two parallel lines are supplementary, so we can set an equation as:

[tex]\angle M+\angle N=180[/tex]

[tex](6y-10)+(4y-10)=180[/tex]  

[tex]6y-10+4y-10=180[/tex]

[tex]10y-20=180[/tex]

[tex]10y-20+20=180+20[/tex]

[tex]10y=200[/tex]

[tex]\frac{10y}{10}=\frac{200}{10}[/tex]

[tex]y=20[/tex]

Upon substituting value of y in measure of angle M, we will get:

[tex]m\angle M=6y-10[/tex]

[tex]m\angle M=6(20)-10[/tex]

[tex]m\angle M=120-10[/tex]

[tex]m\angle M=110[/tex]

Therefore, measure of angle M is 110 degrees.

Similarly, we will find the value of angle N as:

[tex]m\angle N=4y-10[/tex]

[tex]m\angle N=4(20)-10[/tex]

[tex]m\angle N=80-10[/tex]

[tex]m\angle N=70[/tex]

Therefore, measure of angle N is 70 degrees.

Answer:

The value of the test statistic is [tex]t = 2.67[/tex]

Step-by-step explanation:

The null hypothesis is:

[tex]H_{0} = 7.8[/tex]

The alternate hypotesis is:

[tex]H_{1} \neq 7.8[/tex]

Our test statistic is:

[tex]t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.

In this problem, we have that:

[tex]X = 8.2, \mu = 7.8, \sigma = 0.6, n = 16[/tex]

Then

[tex]t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

[tex]t = \frac{8.2 - 7.8}{\frac{0.6}{\sqrt{16}}}[/tex]

[tex]t = 2.67[/tex]

The value of the test statistic is [tex]t = 2.67[/tex]

Answer:

B,1/5

Step-by-step explanation:

Answer:

the answer would be

B aka your second option

Step-by-step explanation:

i don't really have a step by step but this is the first question i've answered on this app let me know if i am helpful!!

A = 2w+5

example: on week three, she would have the recipes from the other weeks that you have to account for as well as the extra five

2(3)+5=11 so A would equal 11 by week three.

Use multiplication because it is essentially repeated addition.

2(from week 1) + 2(from week 2) + 2(from week 3) + 5(prior to school) =11

Answer: The cheese weighs 3 kilograms.

Step-by-step explanation:

I will answer this in English, feel free to translate it if you need it.

This can be translated to:

In a weighing pan of a scale, we place a cheese, in the other we put three-quarters of another cheese equal, and to balance it we add a weight of 3/4 kg. What is the weight of the cheese?

We know that the weight on both pans must be the same.

Then if the weight of the cheese is C, we have the equation:

C = (3/4)*C + 3/4kg

this says:

The weight of the complete cheese is equal to the weight of 3/4 of the cheese plus 3/4kg.

Now we can solve it for C.

C  - (3/4)*C = 3/4kg

C*(1 - 3/4) = C*(1/4) = 3/4kg

C = 4*(3/4)kg = 3kg

The cheese weighs 3 kilograms.