solve for x im not good at math

Answer:

one apple: 75 cents

one orange: 60 cents

Step-by-step explanation:

let x be price of one apple

let y be price of one orange

3x + 4y = 4.65

5x + 8y = 8.55

we can do elimination, substitution, or graphing.

this is elimination: (we're eliminating the x in this case to find y, and then use y to find x)

ORIGINAL EQUATIONS: (we're multiplying by 5 so we can eliminate x)

3x + 4y = 4.65

5x + 8y = 8.55

5(3x + 4y = 4.65) = 15x + 20y = 23.25

3(5x + 8y) = 8.55 = 15x + 24y = 25.65

(distribute, and then subtract to get one equation and eliminate x)

  15x + 20y = 23.25

-  15x + 24y = 25.65

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

  0    -    4y = - 2.4

so we got that, now we make it this:    -4y = -2.4

divide both sides by -4.

-4y = -2.4

-----    -----

-4          -4

y (orange variable) = 0.60

therefore, one orange cost 60 cents.

plug y (the 60 cents) back into one of the original equations (either works) and solve for x.

3x + 4y = 4.65

5x + 8y = 8.55

let's use this equation:  5x + 8y = 8.55

5x + 8(0.6) = 8.55

5x + 4.8 = 8.55

     -4.8      -4.8

5x = 3.75

----    ------

5        5

x = 0.75

therefore, one apple cost 75 cents.

(also, there was an easier number to multiple the equations by)

3x + 4y = 4.65

5x + 8y = 8.55

We could have multiplied (3x + 4y = 4.65) with 2, distributing and bringing it to 6x + 8y = 9.30

Then subtract 6x + 8y = 9.30 from 5x + 8y = 8.55, and you would have solved and gotten x just fine, then plugged x back in to find y)

sorry this answer is so long...good luck :))

Answer:

3×2+2x-5

6-5+2x

1+2x

-4+7×2

-4+14

10

At the 0.05 significance level, we cannot conclude that the assembly time for the Meat Man Barbecue is different from the claimed 18 minutes.

The consumer advocate surveyed 11 randomly selected people and found an average assembly time of 17.3 minutes with a standard deviation of 2.3 minutes.

Given the limited size of the sample, the contrast in the typical duration of assembly is somewhat insignificant.

It is challenging to draw a definitive conclusion without performing an official hypothesis examination, but the available data does not offer significant proof to refute the manufacturer's assertion.

Read more about standard deviation here:

https://brainly.com/question/24298037

#SPJ4

The correlation coefficient can take values between -1 and 1, inclusive. A correlation coefficient of -1 indicates negative correlation and 1  indicates positive correlation.

A correlation coefficient of -1 indicates a perfect negative correlation, meaning that as the values of one variable increase, the values of the other variable decrease. A correlation coefficient of 1 indicates a perfect positive correlation, meaning that as the values of one variable increase, the values of the other variable also increase.

A correlation coefficient of 0 indicates no correlation, meaning that there is no relationship between the two variables. Correlation coefficients can take any value between -1 and 1, inclusive, including fractional and decimal values.

Positive values indicate positive correlation, negative values indicate negative correlation, and values close to 0 indicate little or no correlation. The magnitude of the correlation coefficient indicates the strength of the relationship between the two variables.

The closer the coefficient is to 1 or -1, the stronger the relationship between the variables.

To learn more about correlation click on,

https://brainly.com/question/16258940

#SPJ4

Answer:

24 girls are wearing a bracelet

Step-by-step explanation:

2/5=0.4

60*0.4=24

The answer to the question can be obtained as follows:Given, Dividend after 1 year, D1 = $3.11Price of stock today, P0 = $65.62Expected price after 1 year, P1 = $72.00Expected price after 2 years, P2 = $75.99Dividend after 2 years, D2 = ?The dividend discount model can be used to solve the problem since the expected dividend is paid annually.

D1 = D0(1 + g) where g is the growth rate of the dividend.Using the formula for the present value of a stock, we have

P0 = D0 / (1 + r)^1 + D1 / (1 + r)^2 + P1 / (1 + r)^2

where r is the expected return on the stock.Substituting the values,P0 = 3.11 / (1 + r)^1 + D2 / (1 + r)^2 + 72.00 / (1 + r)^2....(1)Solving for the expected dividend in 2 years,D2 = P0(1 + r)^2 - 3.11(1 + r) - 72(1 + r)^2 / (1 + r)^2....(2)We can now substitute the values given to obtainD2 = 75.99(1 + r)^2 - 3.11(1 + r) - 72(1 + r)^2 / (1 + r)^2From this, we get a quadratic equation to solve for r.

75.99(1 + r)^2 - 3.11(1 + r) - 72 = 0

Solving the equation we get two roots: -1.13 and 0.72 since the expected rate of return cannot be negative, we use the positive value i.e. 0.72.Substituting the value of r into (2), we obtain:D2 = $6.16Therefore, the expected dividend after 2 years is $6.16. Option C is, therefore, correct.

To know more about quadratic equation visit :

https://brainly.com/question/30098550

#SPJ11

a cooking store owner random 100 coustmer asking their favourite foo 28 liked tacos 54

The relative extrema of f(x) = ln(4 - x²) using the second derivative test indicate a relative maximum at x = 0.

To find the relative extrema of a function, we start by finding its critical points, which are the points where the derivative is either zero or undefined. In this case, the function f(x) = ln(4 - x²) has a critical point at x = 0, where the derivative is zero.

Next, we use the second derivative test to determine whether the critical point is a relative maximum or minimum. We take the second derivative of f(x) and evaluate it at the critical point x = 0. The second derivative of f(x) = ln(4 - x²) is f''(x) = -2x / (4 - x²).

Substituting x = 0 into the second derivative, we get f''(0) = 0 / 4 = 0. Since the second derivative is zero at x = 0, the second derivative test is inconclusive in determining the nature of the critical point.

However, we can observe the graph of the function and note that as x approaches 0 from either side, the function increases and approaches positive infinity. Therefore, we conclude that x = 0 is a relative maximum.

Learn more about Derivative

brainly.com/question/29020856

#SPJ11

a) The median number of hours per week these Year 12 students spend doing homework is 4 hours.

b) If 10% of Year 12 students spend more than k hours per week doing homework, then the value of k is 5.75 hours.

The median is a central value or a middle value in a distribution. The number of values in a dataset is an important factor that determines the calculation of the median. It is a value that cuts the data set into two equal parts.

The data set consists of 20 Year 12 students. Sort the data in ascending order (or descending order) and find the middle value. Then, use the formula for calculating the median. 

a)The number of hours per week the Year 12 students spend doing homework is given as:

3, 3, 3, 3, 3, 3, 3.5, 3.5, 4, 4, 4, 4, 4.5, 5, 5, 5.5, 6, 7, 8, 8.5

Arrange the data in ascending order:

3, 3, 3, 3, 3, 3, 3.5, 3.5, 4, 4, 4, 4, 4.5, 5, 5, 5.5, 6, 7, 8, 8.5

Now count the data, which gives us 20 numbers. The middle value is the 10th and the 11th numbers, which are both 4.

So the median of the number of hours per week Year 12 students spend doing homework is 4 hours.

b) If 10% of Year 12 students spend more than k hours per week doing homework, then the value of k can be found using the following formula:

100% - 10% = 90%

So, 90% of students study for k hours or less.

So, the value of k can be found using the median. The median value is 4 hours, and 90% of students are studying for k hours or less. Therefore, 10% of students study for more than k hours.

k = 10% more than the value of the 90th percentile value, which is given by: k = 5.5 + ((8-5.5)/10)*1 = 5.5 + 0.25 = 5.75 hours.

Therefore, 10% of Year 12 students spend more than 5.75 hours per week doing homework.

To know more about the "median": https://brainly.com/question/26177250

#SPJ11

The missing values are derived from the graph as follows:

3 ) 7, 14, 21, 28, 35

4) 3, 7, 10, 14, 17

5) 1, 21, 10, 49, 19

In mathematics, a graph is defined as a graphical representation or diagram that organizes facts or values. The graph's points frequently reflect the relationship between two or more objects.

In order to solve for the above values, the best way is to spot the function that exists in the graph which is given as:

F(y) = 3.5x

In the first table, where x = 2

y= 3.5 *2

= 7

This iteration goes on and on and is consistent for all the values.

In the second table,

Where F(y) is known, for example 10.5, then x is derived as:

10.5 = 3.5x (divide both sides by 3.5)

x = 3

This iteration goes on and on and is consistent for all the values.

In the third table, we simply swap the values back and forth using the function F(y) = 3.5x to derive all values.

Learn more about graphs:

https://brainly.com/question/16608196
#SPJ1

There are 680 ways can Marie choose 3 pizza toppings from a menu of 17 toppings if each topping can only be chosen once.

We have to given that;

Marie choose 3 pizza toppings from a menu of 17 toppings.

Hence, To find ways can Marie choose 3 pizza toppings from a menu of 17 toppings if each topping can only be chosen once,

We can formulate;

⇒ ¹⁷C₃

⇒ 17! / 3! 14!

⇒ 17 × 16 × 15 / 6

⇒ 680

Thus, There are 680 ways can Marie choose 3 pizza toppings from a menu of 17 toppings if each topping can only be chosen once.

Learn more about the combination visit:

brainly.com/question/28065038

#SPJ1

Step-by-step explanation:

x+ 3/2 = 7/8

3/2 is equivalent to the fraction 12/8

Since the two fractions have common denominators, you can do.

x= 7/8 - 12/8

x=(-5/8)

Hope this helps!!!

Answer:

x = -0.625

Step-by-step explanation:

x+3/2 = 7/8

x + 1.50 = 0.875

x = -0.625

Answer:

The change in latitude, Δφ, from Liverpool to Melbourne is 91.22° south

The change in longitude, Δλ, from Liverpool to Melbourne is 147.95° East

Step-by-step explanation:

The parameters given are;

The latitude of Liverpool is 53.41°

The longitude of Liverpool is -2.99°

The latitude of Melbourne is -37.81°

The longitude of Melbourne is 144.96°

The change in latitude from Liverpool to Melbourne = Δφ

Δφ = 53.41° - (-37.81°) = 53.41° + 37.81° = 91.22°

The change in latitude, Δφ, from Liverpool to Melbourne = 91.22° south

The change in longitude from Liverpool to Melbourne = Δλ

Δλ = -2.99° - 144.96°  = -147.95°

Therefore the change in longitude from Liverpool to Melbourne = 147.95° East.

Answer:

the difference in latitude is 91.22°

the difference in longitude is 147.95°

Explanation:

For Liverpool, London. The latitude is 53.41°, longitude is -2.99°

For  Melbourne, Australia. The latitude is -37.81°, longitude is 144.96°

The negative or positive magnitude of their values shows their position on either sides of the origin of the latitude (equator) and the origin of the longitude (prime meridian).

The latitude measures the relative position of a point, north or south of the equator (latitude 0°). The longitude measures the relative position, east or west of the prime meridian (longitude 0°)

the difference in latitude is 53.41° - (-37.81°) = 53.41° + 37.81° = 91.22°

the difference in longitude = 144.96° - (-2.99°) = 144.96 + 2.99 = 147.95°

The magnitude of vector u is √5 and the angle it points is approximately 63.43 degrees in the second quadrant.

The vector u = (-1, -2) has a magnitude of √(1² + 2²) = √5. To find the angle in which the vector points, we can use trigonometric functions. The angle θ can be found by taking the arctangent of the ratio of the y-component to the x-component of the vector. In this case, θ = arctan(-2/-1) = arctan(2) ≈ 1.107 radians or approximately 63.43 degrees. Since the angle is measured counterclockwise from the positive x-axis, it lies in the second quadrant.

The magnitude of a vector represents its length or size. In this case, we use the Pythagorean theorem to calculate the magnitude of vector u, which is √(1² + 2²) = √5.

To find the angle in which the vector points, we can use trigonometric functions. The angle θ can be determined by taking the arctangent of the ratio of the y-component to the x-component of the vector. In this case, the ratio is -2/-1 = 2. Taking the arctangent of 2 gives us the angle θ = arctan(2) ≈ 1.107 radians or approximately 63.43 degrees.

Since the vector u has negative values for both its x and y components, the angle θ lies in the second quadrant, measuring counterclockwise from the positive x-axis.

Learn more about trigonometric functions here:

https://brainly.com/question/25618616

#SPJ11

Answer: -24x+9=-24x+9=-48x-38

Step-by-step explanation:

Answer: 4.82 km

Step-by-step explanation:

You went for a run on Monday.

You then went on a run on Tuesday as well. On this day you ran 2.41 km and it is said that you ran the same distance on both days which means you ran for 2.41 km on Monday as well.

The total distance you ran is therefore:

= 2.41 + 2.41

= 4.82 km

Answer:

45/3 or 15 simplified

Step-by-step explanation:

so b. 15

Answer:

Quick answer is B

Step-by-step explanation:

Use the rise over run method Y2-Y1 over X2-X1 and get your fraction. Divide your fraction to get your number and you get 15. Your equation should be simalar to this 75-30 over 5-2= 45 over 3 which is equal to 15.

Answer:

$305.9022863 or $305.90 (rounded to 2 decimal places)

Step-by-step explanation:

It is a compound interest, meaning an interest accumulates on an initial amount every period. The formula  

A= P(1+R)^n

A= the total amount P=Initial amount       R= rate  n=time period

P=$100 R=15% or 0.15(decimal)  n=8 (years)  

A= 100 (1.15)^8

A= 100(3.059022863)

A=305.9022863

The amount you will have after 8 years is $220

The formula for calculating simple interest is expressed as:

SI =PRT

P is the principal = $100

T is the time = 8 years

R is the rate. = 15%

SI = 100 * 8 * 0.15
SI = $120

Amount after 8years = $100 + $120
Amount after 8years = $220

Hence the amount you will have after 8 years is $220

Learn more on interest here: https://brainly.com/question/2151013

#SPJ12

Using trigonometric ratio, the length of BE is 10 units, the value of sin B is 0.64 and cos B is 0.64 respectively

This is the ratio between the angles and sides of a right-angle triangle. The six trigonometric ratios are sine (sin), cosine (cos), tangent (tan), cotangent (cot), cosecant (cosec), and secant (sec).

In this problem, we have that

1)

Using tangent of B

tan B = opposite / adjacent

tan B = NE / BE

3/4 = 7.5 / BE

BE = 7.5 / 0.75

BE = 10

2)

To find sin B, we need to calculate the hypothenuse of the triangle which we will use Pythagoras's theorem

NB² = BE² + NE²

NB² = 10² + 7.5²

NB = 12.5

sin B = NE / NB

sin B = 7.5 / 12.5

B = sin⁻¹ (7.5 / 12.5)

B = 0.64

3)

cos B = BE / NB

cos B = 10 / 12.5

B = cos⁻¹ (10/12.5)

B = 0.64

Learn more on trigonometric ratio here;

https://brainly.com/question/17155803

#SPJ1

Answer:

Step-by-step explanation:

Find the inverse function of f(x) = -5x -4 or y = -5x -4

- change x with y and y with x

y = -5x -4 ,

x = -5y -4

- find y

x = -5y -4 , add 4 to both sides

x+4 = -5y, divide both sides by -5

\(\frac{x+4}{-5} = y\) or we can write that

-the inverse of f(x) = -5x -4 is \(f(x)^{-1}\)

\(f(x)^{-1} = \frac{-(x+4)}{5} = \frac{-x-4}{5}\)

The probabilities for the given hours are,

\((a) Pr(100 < x < 250) = 0.302440605\\(b) Pr(\frac{x > 300}{x > 200})=0.670320046\\ (c) Pr(x > 100) = 0.670320046\)

What is probability?

The area of mathematics known as probability deals with numerical descriptions of how likely it is for an event to happen or for a proposition to be true. A number between 0 and 1 is the probability of an event, where, roughly speaking, 0 denotes the event's impossibility and 1 denotes its certainty.

P.D.F , \(f(x) = \frac{1}{250}e^\frac{-x}{250} ; x \geq 0\\\)

C.D.F ,  \(F(X) = 1-e^\frac{-x}{250} ;x \geq 0\)

(a)

\(Pr(100 < x < 250) = F(250) - F(100)\\Pr(100 < x < 250) = (1-e^\frac{-250}{250})-(1-e^\frac{100}{250} )\\ Pr(100 < x < 250) = (e^\frac{-2}{5}-e^-^1) \\ Pr(100 < x < 250) = 0.670320046 - 0.367079441\\ Pr(100 < x < 250) = 0.302440605\)

(b)

\(Pr(\frac{x > 300}{x > 200}) = \frac{Pr[(x > 300) intersection(x > 200)]}{Pr(x > 200)} \\ Pr(\frac{x > 300}{x > 200}) = \frac{Pr(x > 300)}{Pr(x > 200)} \\Pr(\frac{x > 300}{x > 200}) = \frac{1 - F(300)}{1-F(200)} \\Pr(\frac{x > 300}{x > 200}) = \frac{e^\frac{-300}{250} }{e^\frac{-200}{250} } \\Pr(\frac{x > 300}{x > 200}) = e^\frac{-2}{5} \\Pr(\frac{x > 300}{x > 200})= 0.670320046\)

(c)

\(Pr(x > 100) = 1-Pr(x < 100) = 1- F(100) = e^\frac{-100}{250} = e^\frac{-2}{5} = 0.670320046\)

Hence, the probabilities for the given hours are,

\((a) Pr(100 < x < 250) = 0.302440605\\(b) Pr(\frac{x > 300}{x > 200})=0.670320046\\ (c) Pr(x > 100) = 0.670320046\)

To know more about probability, click on the link

https://brainly.com/question/24756209

#SPJ4

Complete question:

Complete question is attached below,

Answer:

w = ±3

Step-by-step explanation:

(w - 1) (w + 1) = 8

FOIL the left hand side.

w^2 -w+w-1 = 8

w^2 -1 =8

Add 1 to each side.

w^2 -1+1 = 8+1

w^2 = 9

Take the square root of each side.

sqrt(w^2) = sqrt(9)

w = ±3

Answer: 12 cups

Step-by-step explanation:

Answer:

12 cups

Step-by-step explanation:

1 pint = 2 cups

6 pints = 6 × 2 cups = 12 cups

Throughout my studies in media and current events, I have gained several major learnings that have shaped my understanding of the subject matter.

These include the importance of media literacy and critical thinking, the power and influence of social media, the role of bias in news reporting, the significance of ethical journalism, and the impact of media on shaping public opinion.

1. Media Literacy and Critical Thinking: One of the most crucial learnings is the importance of media literacy and critical thinking skills. It is essential to analyze and evaluate the information presented by media sources, considering their credibility, bias, and potential agenda. Developing these skills enables individuals to make informed judgments and avoid misinformation or manipulation.

2. Power and Influence of Social Media: Another significant learning is recognizing the power and influence of social media in shaping public opinion and disseminating news. Social media platforms have become prominent sources of information, but they also pose challenges such as the spread of fake news and echo chambers. Understanding the impact of social media is crucial for both media consumers and producers.

3. Role of Bias in News Reporting: Media bias is an important factor to consider when consuming news. I have learned that media outlets may have inherent biases, influenced by their ownership, political affiliations, or target audience. Recognizing these biases allows for a more balanced and critical understanding of news content, and encourages seeking diverse perspectives.

4. Significance of Ethical Journalism: Ethics play a fundamental role in responsible journalism. I have learned about the importance of principles such as accuracy, fairness, and accountability in reporting news. Ethical journalism promotes transparency and ensures the public's trust in the media, contributing to a well-informed society.

5. Impact of Media on Shaping Public Opinion: Lastly, I have learned that the media holds a significant role in shaping public opinion and influencing societal attitudes. Through various forms of media, such as news coverage, documentaries, or entertainment, narratives are constructed that can sway public perception on issues ranging from politics to social matters. Recognizing this influence is crucial for media consumers to engage critically with the information they receive and understand the potential impact it can have on society.

These five major learnings have provided me with a comprehensive understanding of media and current events, enabling me to navigate the vast landscape of information and make more informed judgments about the media I consume. They highlight the importance of media literacy, critical thinking, understanding bias, ethical journalism, and the impact media has on public opinion, ultimately contributing to a more well-rounded and discerning approach to media consumption.

Learn more about media here: brainly.com/question/20425002
#SPJ11

Answer:

- All real numbers are rational numbers.   FALSE

- Some rational numbers are natural numbers. TRUE

- No real numbers are irrational numbers. FALSE

- All whole numbers are integers. TRUE

- Some integers are natural numbers. TRUE

- No rational numbers are integers. FALSE

Answer: B,D, and E

Step-by-step explanation:

A. All real numbers are rational numbers.

B. Some rational numbers are natural numbers

C.No real numbers are irrational numbers.

D.All whole numbers are integers.

E. Some integers are natural numbers.  

F. No rational numbers are integers.

Answer:

Step-by-step explanation:We need the options to make a seection, but the possibilities are:

d = dimes, q = quarters

0d, 22q

1d, 21q

2d, 20q

3d, 19q

4d, 18q

5d, 17q

6d, 16q

7d, 15q

8d, 14q

9d, 13q

10d, 12q

11d, 11q

12d, 10q

13d, 9q

Answer: 24 pages

Step-by-step explanation:

10 times 24 equals 240

Answer:

Janet has to read 24 pages.

Hallie has to read 240 pages.

Step-by-step explanation:

If Janet has to read n pages, then Hallie has to read 10×n.

Together they have to read 11 × n = 264 pages, so: n=264÷11=24.

Hope this helps

The number of times Gus needs to fill the bucket will be 3.

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Number of times = volume of tank /volume of cylinder

The volume of the cylinder = πr²h

3.14 x 5² x 20 = 1570

4710 /  1570 = 3 times

Therefore, the number of times Gus needs to fill the bucket will be 3

The complete question is given below:-

How many times will Gus need to fill the bucket to completely fill the fish tank if he doesn’t spill a drop? Use 3.14 for pi

To know more about an expression follow

https://brainly.com/question/723406

#SPJ1

Answer: 3

Step-by-step explanation:

1. This problem calls for the formula for the volume of a cylinder which is 

   V=π\(r^{2}\)h

2. First let's find the volume of one bucket. The bucket has a radius of 5    inches and a height of 20 inches.

V= 3.14 x \(5^{2}\) x 20

  = 3.14 x 25 x 20

  = 1570

3. To find out how many buckets it will take to fill the tank, we can divide the total volume of the fish tank by the volume of each full bucket.

\(\frac{4710}{1570}=3\)

4. Gus will need to fill the bucket 3 times in order to completely fill the fish tank.