Please help, will mark as brainlest

Each visit, Olivia ordered a sandwich and left a $2. 25 tip. She spent a total of $39. Therefore, an equation that represents this situation, if c represents the cost of a salad is  4(x+2.25) = 39.

Equation:

An equation is a formula that expresses that two expressions are equal by joining them with the equal sign =.The word comparison and its cognates in other languages ​​may have subtly different meanings; for example, in French, an equation is defined to contain one or more variables, and in English any well-formed formula composed of two expressions linked by equal signs is an equation.

According to the Question:

Let the cost of each salad = c

Therefore we can write

    4(x+2.25) = 39

or, x+ 2.5 = 39

or, x = 39 − 2.5

or, x = 39 − 2.5

or, x = 26.5

Therefore, The equation that represents this situation, if c represents the cost of a salad is 4(x+2.25) = 39.

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Answer:

(1.2075)

Step-by-step explanation:

Lets assume we are increasing a price on a $100 item to help visualize the steps.

The two steps of 5% and then 15% can each be expressed as:

5%:  (1+0.05)  [The 1 represents the fact that the final cost is full price (1) plus 5%(0.05)]

15%  (1+0.15)   [Same explanation, but now with 0.15 for 15%]

We can apply these factors individually:

Assume a base of $100:

5% increase would make it $105  [$100*(1.05)=$105]

15% increase:  On top of the 5%, we would go to:  $105*(1.15) = $120.75

Or we can use a single multiplier.

If we look at the steps from above, we see that the algebra consisted of taking the origianl price ($100) and multiplying it twice:  once with (1+0.05) and once with (1+1.15).  Write this in the form of an equation:

  ($100)*(1+0.05)*(1+0.15) = $120.75

Let's multiply (1+0.05)*(1+0.15)

                       = (1.2075)

We can use this single factor (multiplier) to find the correct/same value as before:

              (1.2075)($100) = $120.75

√3/2  and √3x / x.

The value of sin (cos-1 (1/2)) and tan (sec-1 (x/3)) are:Sin (cos-1 (1/2)):In the trigonometry section, the cosine inverse (or arccosine) is used to find the angle whose cosine value is equal to a given number.The cosine inverse (or arccosine) of a number is the angle whose cosine is equal to that number (cos-1). Therefore, cos-1 (1/2) represents the angle that has a cosine of 1/2.The sine is the ratio of the length of the opposite side to the length of the hypotenuse of a right triangle.Sin (cos-1 (1/2)) = sqrt (1 - cos2 (cos-1 (1/2)))Since cos (cos-1 (1/2)) = 1/2, we can substitute it.Sin (cos-1 (1/2)) = sqrt (1 - (1/2)2) = sqrt (3/4) = √3/2Tan (sec-1 (x/3)):The secant inverse (or arcsecant) is used to find the angle whose secant value is equal to a given number.The secant inverse (or arcsecant) of a number is the angle whose secant is equal to that number (sec-1). Therefore, sec-1 (x/3) represents the angle that has a secant of x/3.The tangent is the ratio of the length of the opposite side to the length of the adjacent side of a right triangle.Tan (sec-1 (x/3)) = sqrt (sec2 (sec-1 (x/3)))Since sec (sec-1 (x/3)) = 3/x, we can substitute it.Tan (sec-1 (x/3)) = sqrt (3/x) = √3 /√x = (√3 /√x) × (√x /√x) = √3x / xTherefore, sin (cos-1 (1/2)) = √3/2 and tan (sec-1 (x/3)) = √3x / x.

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The side length of a square with an area of 49 square centimeters is 7 centimeters.

Area is a measurement of the amount of space inside a 2-dimensional shape, such as a rectangle, square, triangle, circle, or any other polygon

The area of a square is calculated by multiplying its length by its width. For a square, however, its length and width are equal.

So, if we let "x" be the side length of the square, we can express the area as,

x^2 = 49

To solve for x, we can take the square root of both sides of the equation:

sqrt(x^2) = sqrt(49)

x = 7 centimeter

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a) The expected value for the weight of a randomly chosen apple from the box is 11/24.

b) The variance of the weight of a randomly chosen apple from the box is 19/72.

a) The expected value of the weight of a randomly chosen apple from the box can be calculated as:

E[Y] = E[E[Y|Z]] = E[1/(2Z)] = 1/2 * (1/2 + 1/4 + 1/6) = 11/24

Therefore, the expected value for the weight of a randomly chosen apple from the box is 11/24.

b) The variance of the weight of a randomly chosen apple from the box can be calculated as:

Var(Y) = E[Var(Y|Z)] + Var(E[Y|Z])

Since E[Y|Z=j] = 1/(2j) and E[Y²|Z=j] = 1/j, we have:

Var(Y|Z=j) = E[Y²|Z=j] - [E[Y|Z=j]]² = 1/j - (1/(2j))² = (3/4) * (1/j²)

Therefore, we can calculate the variance of Y as:

Var(Y) = E[Var(Y|Z)] + Var(E[Y|Z])

= 1/3 * (3/4 * (1/1²) + 3/4 * (1/2²) + 3/4 * (1/3²)) + Var(11/24)

= 1/4 * (1 + 1/4 + 1/9) + 0

= 19/72

So, the variance of the weight of a randomly chosen apple from the box is 19/72.

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It is not possible to determine the relationship between the two variables based on this scatterplot.

The scatterplot below does not show a good candidate for linear regression because the points do not follow a clear pattern. There is no consistent trend that shows a correlation between the X and Y variables. Therefore, it is not possible to determine the relationship between the two variables based on this scatterplot.The linear regression is a statistical technique that enables the analysis of relationships between two or more continuous variables. The method attempts to find the line of best fit, which represents the overall relationship between the two variables. A scatterplot, which is a graphical display of a dataset, can be used to determine whether two variables are good candidates for linear regression.In order for two variables to be a good candidate for linear regression, they must have a strong positive or negative correlation. In other words, the points on the scatterplot must follow a clear pattern that shows a linear relationship between the X and Y variables. If there is no clear pattern or the points are randomly scattered, then it is not possible to determine the relationship between the two variables based on a linear regression model.

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Answer: 9

Step-by-step explanation: sorry if it is wrong

Answer:

0

Step-by-step explanation:

2p - (p + 3) + 3

2(6) - (6 + 3) + 3

12 - (9) + 3

12 - 12 = 0

The solution to the system of equations y = -2x + 4 and y = 1/2x + 4 is the point (0, 4)

A system of equations is a set of two or more equations that are to be solved simultaneously.

The solution of a system of equations is a set of values that satisfy all the equations in the system.

Given the equations:

y = -2x + 4

y = 1/2x + 4

The question implies that we solve graphically

So, we create a plot of the equations y = -2x + 4 and y = 1/2x + 4

And we write out the coordinate of the point of intersection between the two equations

From the graph of the system of equations (see attachment), we have the point of intersection to be (0, 4)

This means that the solution to the system of equations is (0, 4)

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Complete question

Solve the system of equations graphed on the coordinate axes below.

y = -2x + 4

y = 1/2x + 4

The expression of the dimensions are 3w - 2 by w

From the question, we have the following parameters that can be used in our computation:

The length of a rectangle is 2 less than 3 times as long as the width

Using the following variable definitions, we have

Based on the given information, we can express the length (l) in terms of the width (w):

l = 3w - 2

Hence, the dimensions are 3w - 2 by w

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Option B is the correct answer.

The correct answer to the given question is Option B, which is "I would replace the missing values with the average value of that specific variable."What are Data Preparation activities?Data preparation activities consist of operations that change the quality, consistency, or completeness of data. These are performed to improve the data's accuracy and, as a result, the resulting insights.When it comes to numerical data, there are certain techniques you can use to deal with missing data. There are many ways to deal with missing numerical data, but one of the simplest is to use the mean or median value of the dataset to replace the missing values. This method is also known as mean imputation.Therefore, if during the data preparation activities, you have identified a small amount of missing numerical data, you should replace the missing values with the average value of that specific variable. Therefore, Option B is the correct answer. The other options such as excluding all observations with missing data, excluding all variables with missing data, and none of the above is true are not accurate.

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The value of z can be determined by solving the equation 7z-94 = 2z+76, which yields z=35.

To determine the value of z in the given equation, it is necessary to solve the equation 7z-94 = 2z+76. Begin by subtracting 2z from both sides of the equation, which yields 7z-2z-94 = 76. Simplifying this yields 5z-94 = 76. To solve for z, add 94 to both sides of the equation, which yields 5z = 170. Dividing both sides by 5 yields z = 34. Since the equation is not asking for an exact value, it can be rounded to the nearest whole number, which is 35. Therefore, the value of z is 35.

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logbA = 2.817 and logbB = 0.106 need to be used to find logb A/BA. We know that logarithms are important in mathematics and help us to solve complex problems involving exponents or roots.

They are expressed in terms of the logarithm base, which is the number or expression that is being raised to a power. It can be solved using the quotient rule of logarithms which states that logb (x / y) = logb x - logb y.

Explanation:
The given values are: logbA = 2.817 and logbB = 0.106Let us first use the quotient rule of logarithms to simplify the expression logb A/BA = logb A - logb BA. Using this rule, we get:

logb A/BA = logb A - logb B
Now we can substitute the given values in the above expression:

logb A/BA = 2.817 - 0.106
= 2.711

Therefore, the value of logb A/BA is 2.711. Hence, option (D) 2.711D is the correct answer.

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The number of medals did the United States win is 97 using the equation x + (x + 9) = 185.

Let x be the number of medals Russia won in the 2000 Summer Olympics. Then, since the United States won 9 more medals than Russia, the number of medals the United States won is x + 9.

Together, they won 185 medals, so we can write the equation:

x + (x + 9) = 185

Simplifying the left side, we get:

2x + 9 = 185

Subtracting 9 from both sides:

2x = 176

Dividing both sides by 2:

x = 88

So Russia won 88 medals, and the United States won 88 + 9 = 97 medals.

Therefore, the United States won 97 medals in the 2000 Summer Olympics.

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The probability of selling at least one property in one week is 0.9718

We can approach this problem by finding the probability of not selling any property in a week and then subtracting it from 1 to get the probability of selling at least one property.

The probability of not selling any property in a week is the probability of not selling any one property in a week, raised to the power of the number of properties:

P(not selling any property) = (1 - 0.4)^11 = 0.0282

Therefore, the probability of selling at least one property in a week is:

P(selling at least one property) = 1 - P(not selling any property) = 1 - 0.0282 = 0.9718

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Answer:2

Step-by-step explanation:

we know that the side are the same

[tex]\sqrt{2} ^{2} +\sqrt{2} ^{2} =y^{2}[/tex]

[tex]2+2=y^{2}[/tex]

[tex]\sqrt{4} =y[/tex]

[tex]2=y[/tex]

Answer:

4+3=7

4/7*72/1=288/7=41.1

3/7*72/1=216/7=30.9

41.1:30.9=4:3

The given first-order differential equation is linear in the indicated dependent variable because it matches the standard form of a linear first-order differential equation, a1(x) dy/dx + a0(x)y = f(x).

First, let us review what a linear first-order differential equation is. Ais a differential equation that can be written in the form:

a1(x) dy/dx + a0(x)y = f(x)

Now, let us compare the given differential equation to the standard form of a linear first-order differential equation. The given differential equation is:

a1(x) dy/dx + a0(x)y

As we can see, the given differential equation matches the standard form of a linear first-order differential equation. Therefore, we can conclude that the given differential equation is linear in the indicated dependent variable.

In conclusion, the given first-order differential equation is linear in the indicated dependent variable because it matches the standard form of a linear first-order differential equation, a1(x) dy/dx + a0(x)y = f(x).

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The amount in the account after 5 years would be $137.

Continuous compound interest is a method of calculating the interest earned on a principal amount that is continuously reinvested

We can use the formula for continuous compound interest:

A = Pe^(rt)

where:

A = final amount

P = principal amount

e = Euler's number (approximately 2.71828)

r = annual interest rate (as a decimal)

t = time in years

In this case, we have:

P = $110

r = 0.041 (4.1% expressed as a decimal)

t = 5 years

Substituting these values into the formula, we get:

A = 110e^(0.0415)

A ≈ $136.69

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The expression - x - 3x + 5x + 10x - 4x + 4x simplifies to x.

If we group the like terms, we have:

(-1-3+5+10-4+4)x

An expressiοn in math is a sentence with a minimum οf twο numbers οr variables and at least οne math οperatiοn. This math οperatiοn can be additiοn, subtractiοn, multiplicatiοn, οr divisiοn.

Simplifying the terms inside the parentheses, we have:

1x

And simplifying further, we have the:

x

Therefore, the expression - x - 3x + 5x + 10x - 4x + 4x simplifies to x.

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The perimeter of the triangle present in above figure is 42 dm. Then the value of x is equals to the 9 dm and all three sides of triangle are 9 dm, 11 dm and 22 dm.

We have a triangle present in above figure. The perimeter is the length of the boundaries of a shape. A triangle is a type of polygon with three sides. In other words, it is a closed two dimensional shape having three straight sides. So, perimeter of a triangle = sum of all three sides. Here, perimeter of triangle = 42 dm

Now, first side length of triangle= (3x - 5 ) dm

Second side length = (x + 2) dm

Third side length = x dm

Now, using perimeter formula for triangle,

=> 3x - 5 + x + x + 2 = 42

=> 5x = 42 + 5 - 2 = 45

=> x = 45/5 = 9

3x - 5 = 22 dm

x + 2 = 11 dm

So, sides of triangle are 9 dm, 11 dm and 22 dm.

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Complete question :

The perimeter of the triangle is 42 dm. By determining the measure of its sides, he obtains that the value of x is _? see the above figure

The overhead allocation rate for Department K is $52.63 and the overhead allocation rate for Department Q is $82.26.

The overhead allocation rate for departments K and Q is calculated by dividing the overhead allocated to each department by the direct labor hours used by each department. For Department K, the overhead allocation rate is calculated by dividing $200,000 by 3,800 direct labor hours, which equals $52.63 per hour. For Department Q, the overhead allocation rate is calculated by dividing the remaining overhead of $650,000 by the 6,200 direct labor hours used by the department, which equals $104.84 costs per hour. To calculate the total factory overhead, the following formula is used:Total Factory Overhead = (Department K Overhead + Department Q Overhead) / (Total Direct Labor Hours Used) Total Factory Overhead = ($200,000 + $650,000) / (3,800 + 6,200) Total Factory Overhead = $850,000 / 10,000 .Total Factory Overhead = $85.00 per hour

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The population density of seals is 0.0111 seals/m³.

To calculate the number of meters of tiles needed to purchase, we must first calculate the area of the pool. This can be done by multiplying the length by the width:

9m x 4m = 36m²

We then multiply this area by the depth of the pool to get the total volume:

36m² x 2.5m = 90m³

Now, to calculate the number of meters of tiles needed, we must divide the total cost of the tiles, including installation, by the cost of the tiles per meter:

90 pesos + 50 pesos = 140 pesos

140 pesos ÷ 90 pesos = 1.55 meters

Therefore, 1.55 meters of tiles must be purchased to cover the pool.

To calculate the volume of water for two seals, we must first calculate the volume of the pool, which can be done by multiplying the length by the width and then by the depth:

9m x 4m x 2.5m = 90m³

We then multiply this volume by the number of seals to get the total volume of water needed:

90m³ x 2 seals = 180m³

Therefore, 180m³ of water is needed for two seals to live in the pool.

To calculate the population density of seals, we must divide the total population of seals by the total volume of water needed:

2 seals ÷ 180m³ = 0.0111 seals/m³

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For the standard size banner with a 1-inch margin, Grant would need approximately 1596 square inches of cardboard to make one banner.

The amount of cardboard needed to make a banner depends on the size of the banner. If we know the dimensions of the banner, we can calculate the area of cardboard needed.

Assuming that the banner is a rectangle, let's say its width is w inches and its height is h inches.

Then, the area of the banner can be calculated as:

Area = width x height

Area = w x h

To find out how many square inches of cardboard are needed, we need to add a margin to the dimensions of the banner to account for the thickness of the cardboard. Let's say the margin is m inches.

Then, the width of the cardboard needed is (w + 2m) inches, and the height of the cardboard needed is (h + 2m) inches.

The area of the cardboard needed can be calculated as:

Area of cardboard = (width of cardboard) x (height of cardboard)

Area of cardboard = (w + 2m) x (h + 2m)

So, the total area of cardboard needed for one banner is:

Total area of cardboard = Area of cardboard + Area of margin

Total area of cardboard = (w + 2m) x (h + 2m) + 4m(w + h + 2m)

if we assume that the banner is 2 feet wide (24 inches) and 4 feet long (48 inches), and we add a margin of 1 inch on each side, then we can calculate the total area of cardboard needed as follows:

Total area of cardboard = (24 + 2) x (48 + 2) + 4(1)(24 + 48 + 2)

Total area of cardboard = 26 x 50 + 4(74)

Total area of cardboard = 1300 + 296

Total area of cardboard = 1596 square inches

So, for this standard size banner with a 1-inch margin, Grant would need approximately 1596 square inches of cardboard to make one banner.

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the value of a is -7/4.

Simply change x in the original equation to -1/4 to determine the value of a:

y = 4x² - 7x - 2

y = 4(-1/4)² - 7(-1/4) - 2

y = 1 - (-7/4) - 2

y = 1/4 - 2

y = -7/4

Mathematically, an equation can be defined as a statement that supports the equality of two expressions, which are connected by the equals sign “=”

Two expressions are combined in an equation using an equal symbol ("="). The "left-hand side" and "right-hand side" of the equation are the two expressions on either side of the equals sign. Typically, we consider an equation's right side to be zero. As we can balance this by deducting the right-side expression from both sides' expressions, this won't reduce the generality.

from the question:

We must discover a solution for x before we can find the solutions to the equation y = 4x2 - 7x - 2. By calculating the quadratic equation while putting y equal to zero, we can achieve this:

4x² - 7x - 2 = 0

(4x + 1)(x - 2) = 0

This quadratic equation has two solutions:

4x + 1 = 0 or x - 2 = 0

4x = -1 or x = 2

x = -1/4 or x = 2

As a result, the equation has solutions a = -1/4 and b = 2, where a b.

Simply change x in the original equation to -1/4 to determine the value of a:

y = 4x² - 7x - 2

y = 4(-1/4)² - 7(-1/4) - 2

y = 1 - (-7/4) - 2

y = 1/4 - 2

y = -7/4

Therefore, the value of a is -7/4.

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The point (-3, 4) satisfies all the given conditions, and hence, it is the point we are looking for. The integer in Quadrant II.

An ordered pair of integers (x, y), where x is the horizontal coordinate or the abscissa and y is the vertical coordinate or the ordinate, is used to represent a point in the Cartesian plane. With regard to the x-axis and y-axis, a point on the plane may be located using these coordinates.

Let's assume that the point has coordinates (-x, y), where x > 1 and y > 2.

Then, using the distance formula, we have:

r = √(x² + y²)

Since r > -3, we have:

√(x² + y²) > -3

x² + y² > 9

Now, absolute values of the coordinates is 5, we have:

|x| + |y| = 5

Since x < -1, we have -x > 1, which means that:

|x| = -x -1

Substituting this into the equation above, we get:

(-x - 1) + |y| = 5

|x| + |y| = 5

Subtracting -x - 1 from both sides, we get:

|y| = x + 6

Substituting this into the equation x² + y² > 9, we get:

x² + (x + 6)² > 9

2x² + 12x + 27 > 0

This inequality holds for all x.

Therefore, the point (-3, 4) satisfies all the given conditions, and hence, it is the point we are looking for. The integer in Quadrant II.

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Answer:17

Step-by-step explanation:

Answer: 5

Step-by-step explanation:

Using the law of similar triangles,

x/x-2 = x+(x+5)/x+1+x-2

x/x-2 = 2x+5/2x-1

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

2x²-x = 2x²+x-10

2x²-2x² + x +x -10 = 0

2x-10 = 0

2x = 10

x = 5

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The current flows through the element with resistance of an electric stove burner element is 11 ohms when it runs off a 220 volt line is equals to the 20 Ampere.

The resistance of an electric stove burner element is, R = 11 ohms.

The magnitude or amount of potential

difference in a line that is voltage V

= 220 V.

We have to determine the value current flows through this element.

According to ohm's law : If all physical conditions and temperature remain constant, the voltage across a conductor is proportional to the current flowing through it. The expression is, V = I x R

here, I-> the amount of current

V--> potential difference

R--> resistance

The current value flowing through the element is written by I = V/R

=> I = 220 V/11 ohms

=> I = 20 A

Hence, the required current value is 20 A.

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