Which equation can be used to find X

Answer:

Step-by-step explanation:

to write the proportion is a number of the girl in intramural sport is [tex]\frac{x}{y} 2/3=230[/tex]

and find the number a girl in intramural sport is 90

The area of the sector is 37.7 ft.

A sector is a region of a circle that is bounded by two radii and the arc of the circle that lies between the endpoints of those radii.

The formula for the area of a sector is given by

Where θ is the central angle in degrees, and r is the radius of the circle

Here we have

A circle has a radius of 4 ft.  

The central angle of sector formed = 270°

Using the formula, Area of sector = (θ/360°) × π r²

Area of the given sector = [ 270/360] × 3.14 × (4)²

= [0.75 ] × [50.24]

= 37.68 ft

= 37.7 ft

Therefore,

The area of the sector is 37.7 ft.

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The graph of the piecewise function is added as an attachment

Let c(x) be the cost of an automotive ad with x lines.

For the first 4 lines, the cost is $34, so:

c(x) = 34, for 1 ≤ x ≤ 4

For each additional line beyond the first 4, the cost is $3.50, so:

c(x) = 34 + 3.50(x - 4), for x > 4

When these two cases are put together, we get the piecewise function:

c(x) = 34, for 1 ≤ x ≤ 4

c(x) = 34 + $3.50(x - 4), for x > 4

This function represents the cost of an automotive ad as a piecewise function that depends on the number of lines in the ad.

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If we let "x" be the width of the rectangle, then the length would be "x + 5" (since it's 5 inches longer than the width).

The area of a rectangle is given by the formula A = length x width. Substituting in the expressions we found for the length and width, we get:

A = (x + 5)x

Simplifying this expression, we get:

A = x^2 + 5x

Therefore, the expression that could be used to represent the area of the rectangle is "x^2 + 5x".

After evaluating the given expression, d3a2−(c+b) equals -39 when a=-2, b=3, c=-12, and d = -4

An Algebraic expression is a combination of numbers, variables, and mathematical operations (such as addition, subtraction, multiplication, and division) that can be simplified and evaluated.t may contain one or more variables, which are symbols that represent unknown quantities or values that can vary.

Algebraic expressions can be written using letters, symbols, or a combination of both, and they can be used to model real-world situations, solve problems, and express mathematical relationships. For example, "3x + 5" is an algebraic expression that represents a linear equation with one variable "x".

The given expression is d3a2−(c+b), where a = -2, b = 3, c = -12, and d = -4. Substituting these values, we get:

d3a2−(c+b) = (-4)3(-2)² - (-12 + 3) = -434 - (-9) = -48 + 9 = -39

Therefore, d3a2−(c+b) equals -39 when a=-2, b=3, c=-12, and d=-4.

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Answer:

y = 2x + 4 and 2y - x = 8 represent a system of linear equations.

In this system, the variable x represents an unknown value, while the variable y represents a value that can be determined from the equation. The coefficient 2 in the first equation is an example of a math vocabulary term, indicating that the slope of the line is 2. The term "slope" is a mathematical term that describes the steepness of a line.

The term "system" is an academic vocabulary term that refers to a group of related equations or inequalities. In this case, we have a system of two linear equations that are related to each other.

The second math vocabulary term is "solution", which refers to the set of values of the variables that satisfies both equations in the system. In this case, the solution is the unique point (3, 10), where x = 3 and y = 10.

Finally, the academic vocabulary term "consistent" is used to describe a system of equations that has at least one solution. In this case, the system is consistent because it has exactly one solution, which means the two equations intersect at a single point.

Step-by-step explanation:

From the given situation of equation Diamond worked 24 overtime hours that week.

The hourly rate that is paid for the typical hours worked within a pay period is known as regular pay. For full-time employees in the US, this is typically referred to as 40 hours a week. On the other hand, overtime pay is the hourly rate paid for any additional hours worked. Most businesses give time-and-a-half (1.5 times the usual pay rate) or double-time (two times the regular pay rate) for extra hours, which is often more than regular compensation.

Let us suppose the number of hours = x.

Let us suppose the overtime hours = y.

From the given situation we have:

7.5x + 11.25y = 352.5 (equation 1)

x + y = 35 (equation 2)

Substituting equation 2 into equation 1 and simplifying:

7.5x + 11.25(35 - x) = 352.5

7.5x + 393.75 - 11.25x = 352.5

-3.75x = -41.25

x = 11

Substitute the value of x = 11.

11 + y = 35

y = 24

Hence, Diamond worked 24 overtime hours that week.

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As a resuIt, 10 (181)/181 is the sin vaIue that cοmes cIοsest tο 10 √(181)/√181. B is the apprοpriate answer, sο.

The cοst οr price οf sοmething, aIsο knοwn as its mοnetary vaIue.

The right-angIed triangIe fοrmed by the angIe's terminaI side and the pοints (-9, 10) can be caIcuIated using the Pythagοrean Theοrem tο determine the Iength οf a hypοtenuse:

h = √((-9)² + 10²) = √(81 + 100) = √(181)

Sin is pοsitive because the pοsitiοn (-9, 10) οccupies the secοnd quadrant. We are abIe tο determine the actuaI amοunt οf sin that use the definitiοn οf sin:

sin(theta) = οppοsite/hypοtenuse = 10/√(181)

We can cοmbine the twο parts οf this fοrmuIa by √181 tο οbtain the fοIIοwing resuIt:

sin(theta) = 10 × √(181)/√(181)√(181) = 10√(181)/181

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Answer:

The equation that can be used to determine the average number of miles Keilantra would have to ride each day to meet her goal is:

(28.8 - 4) / 4 = m

This equation subtracts the 4 miles Keilantra has already ridden from her goal of 28.8 miles, and then divides the result by the number of days she still needs to ride (4) to find the average number of miles she would have to ride each day to meet her goal.

Solving this equation gives: (28.8 - 4) / 4 = m

24.8 / 4 = m

6.2 = m

Therefore, the average number of miles Keilantra would have to ride each day to meet her goal is 6.2 miles.

Step-by-step explanation:

Therefore , the solution of the given problem of equation comes out to be w + x + y + z = 35 optian A is correct.

The same letter is frequently used in mathematical formulas to attempt to enforce uniformity among two variable assertions. Mathematical equations, also referred to as assertions, are used to demonstrate the equality of many academic figures. Using the outcome y + 6 = 12 as an example, the normalise divides the numbers 12 and b + 6 into 2 parts. The relationship between each symbol component and the amount of lines can be found. A symbol's meaning typically runs counter to itself.

Here,

In order to remove variables and obtain an expression for w + x + y + z, we can begin by adding the four equations. As a result, we get:

=> (5w + 3y + 7x -2z) + (3z - w + y -3x) + (-2x -2y + 3z - 2w) + (3x + 3y + z + 3w)

=>  17 - 4 + 9 + 13

By condensing both parts, we obtain:

=> 4x + 4y + 4z + 5w = 35

By separating it on one side, we can finally find the solution for

=> w + x + y + z:

=> w + x + y + z = 35

As a result, w + x + y + z = 35

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Step-by-step explanation:

Please when you come across any questions including two equations of two variables, please solve that question by using the simultaneous method.

To go about that, since you would be given two equations, name one equation as "equation one" (eq 1) and the other, "equation two" (eq 2).

Right after that, make any of the variables a subject ( make it stand alone or be on one side of the equal to sign). Now, substitute that variable you've made the subject into the other equation which you didn't make any variable the subject. Solve for that, by grouping all like terms and you would realize that the final result would be the answer of one of the variables.

After getting that value, substitute that value in place of its variable. (For instance, x = 1, substitute the value which is 1 in place of x in the equation you made a variable the subject at the beginning). Solve for that equation too, and finally you would arrive at an answer or a value.

To verify that your answers are right, substitute the values in their respective variables. ( For instance, if x = 1 and y = 2, put 1 in place of x and 2 in place of y in the first equation then do same for the second equation as well). The answer would be the same as the number it has been equated to.

We are 95% confident that the true mean hearing loss of senior citizens is between 3.5249 and 4.8751

A confidence interval is a range of estimates for an unknown parameter in frequentist statistics. The 95% confidence level is the most usual, but other levels, such 90% or 99%, are occasionally used to generate a confidence range.

How to calculate:

From the given data:

n= 30

x = 4.2

s = 1.808

d.f = n-1 = 30-1 = 29

At 95% confidence interval:

t[tex]\alpha /2[/tex] = 2.0452

The 95% C.I for the mean is:

x ± t[tex]\alpha /2[/tex]

= 4.2 ± 2.045 [tex]\frac{1.808}{\sqrt{30} }[/tex]

= 4.2 ± 0.6751

( 3.5249, 4.8751)

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Answer:

Step-by-step explanation:

SEE THE ATTACHMENT

The measures of the angles, obtained using circle theorems are;

a = 90°, b = 12°, c = 64°, d = 54°, e = 54°, f = 48°, g = 66°, h = 32°, i = 36°, and j = 20°

Circle theorems are theorems that specify the relationships between the chords, tangents, sectors, and angles in a circle.

The linear pair angles ∠a indicates;

a + a = 2·a = 180°

a = 180°/2 = 90°

The 78° angle in the inscribed right triangle indicates;

∠b = 90° - 78° = 12°

The 32° angle at the circumference of one of the circles indicates;

Angle at the center, which nis a base angle of the large triangle = 2 × 32° = 64°

A base angle of the large triangle = 64°

∠C = A base angle of the large triangle = 64°

2·c + d = 180° (Properties of a cyclic quadrilateral)

Therefore;

2 × 64° + d = 180°

d = 180° - 2 × 64° = 54°

d = 54°

Angle ∠e = Angle ∠d = 54°

The vertex angle of the inscribed isosceles triangle in the circle with angle ∠f is; 4·b

Therefore;

The vertex angle = 4 × 12° = 48°

An angle formed between a chord and a circle is equivalent to the angle in the segment that is in the alternate side or area, therefore;

Circle theorem indicates; ∠f = The vertex angle = 48°

The base angles of the isosceles triangle = (180° - 48°)/2 = 66°

Angle ∠g = 66°

The  chord which is the base of the isosceles triangle in the circle with the angle h forms an isosceles triangle with the sides of the large triangle, such that the base angles are also ∠c = 64°

Circle theorem indicates that the vertex angle of the triangle with angle h is also 64°

Therefore, according to circle theorem; 2·h = 64°

h = 64°/2 = 32°

The vertex angle of the quadrilateral with angle 2·f is; 180° - 2·f

The vertex angle is therefore; 180° - 2 × 48° = 84°

The angle at the center is therefore; 2 × 84° = 168°

Angle ∠i is therefore;

i = 360° - 5·b - 2·f - 168°

i = 360° - 5 × 12° - 2 × 48° - 168° = 36°

5·b + 2·h + i + j = 180°

Therefore; j = 180° - (5·b + 2·h + i)

j = 180° - (5 × 12° + 2 × 32° + 36°) = 20°

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The classroom would hold about 34,767 basketballs.

What is the volume of the rectangular prism?

To find the volume of a rectangular prism, you need to know its length, width, and height. Let's assume you have those measurements.

The formula for the volume of a rectangular prism is:

volume = length x width x height

We need to know the volume of the classroom in order to determine how many of a certain object it would hold.

The volume of a rectangular prism (like the classroom) is given by the formula:

volume = length x width x height

Plugging in the values we know:

volume = 24 feet x 28 feet x 10 feet

volume = 6720 cubic feet

Now we can divide the volume of the classroom by the volume of the object we want to find out how many will fit.

For example, if we want to know how many basketballs would fit in the classroom, we would need to know the volume of a basketball. According to the NBA, the standard size for a basketball is about 9.43 inches (0.7867 feet) in diameter. The volume of a sphere is given by the formula:

volume = (4/3) x π x radius^3

Plugging in the radius of the basketball:

volume = (4/3) x π x (0.7867/2)^3

volume ≈ 0.193 cubic feet

Dividing the volume of the classroom by the volume of a basketball:

6720 cubic feet / 0.193 cubic feet per basketball ≈ 34,767 basketballs

Hence, the classroom would hold about 34,767 basketballs.

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The correct answer would be x equals negative 3 plus or minus 2 root 3

What is the quadratic equation?

The quadratic equation is a mathematical formula used to find the solutions (roots) of a quadratic function, which is a second-degree polynomial function of the form:

ax^2 + bx + c = 0

To solve for x in the equation x² + 6x + 9 = 12, we can start by simplifying the left-hand side by factoring the quadratic expression:

(x + 3)² = 12

Taking the square root of both sides, we get:

x + 3 = ±√12

Simplifying the right-hand side, we get:

x + 3 = ±2√3

Finally, solving for x, we have:

x = -3 ± 2√3

Therefore, the solution for x is:

x = -3 + 2√3 or x = -3 - 2√3

So, the correct response is:

x=−3±2√3

Hence, the correct answer would be x equals negative 3 plus or minus 2 root 3

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Answer:

-3 plus minus 2√3

Step-by-step explanation:

took test

The equation for the least squares regression line is y = 0.488x + 8.543.

Least squares regression line is the line of best fit formed when the relationship is linear for the given data points.

Number of data points, N = 5

x : 35         39         63         86         93        Σx = 316

y : 38         20         28         55         56        Σy = 197

x² : 1225   1521    3969    7396     8649       Σ(x²) = 22,760

xy : 1330   780     1764     4730     5208       Σ(xy) = 13,812

Slope of the line, m = [N Σ(xy) - Σx Σy] / [N Σ(x²) - (Σx)²]

                                 = [ (5 × 13812) - (316 × 197) ] / [(5 × 22760) - (316)²]

                                 = 6808/13944

                                 = 0.488

Intercept, b = [Σy - (m Σx)] / N

                   = [197 - (0.488 × 316)] / 5

                   = 8.543

Equation of the line is y = mx + b

y = 0.488x + 8.543

Hence the equation of the line is y = 0.488x + 8.543.

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Using the method of solving a system of equations, we grouped each system as no solution, one solution and infinite solutions.

What is a system of equations?

A mathematical equation is a formula that uses the equals sign to represent the equality of two expressions. A set or group of equations that are solved collectively is referred to as a system of equations. Both algebraic and visual solutions are possible for these equations. The intersection of two lines represents the system of equations' solution. A group of equations that are all satisfied by the same set of variables are referred to as a system of linear equations. Finding the value of the variable that makes the condition of all the given equations true is the primary goal when solving an equation system.

1) y = -3 and x = -6

This system of equations has only one solution as the variables have only a constant as their value.

2) y = 2x and y = -2x

    There is only one solution to this system of equations. It is x =0 and y = 0. This solution only satisfies these equations.

3) y = -x -2

   y = -x -6

  There is no solution to this system of equations as the mathematical operation on two numbers will not give two values.

4) y = 3x + 4

2y = 6x + 8

There is an infinite number of solutions as the second equation when divided by 2 becomes y = 3x + 4, which is the same as the first equation.

5) y = 9x -1

   y = x + 9

 There is only one solution for this system of equations.

Therefore using the method of solving a system of equations, we grouped each system as no solution, one solution and infinite solutions.

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Answer:

Step-by-step explanation:

One possible solution to the linear equation −5x+y=−10 is:

x = 2

y = 0

To check if this solution is valid, we can substitute the values of x and y into the equation and see if it satisfies the equation:

(-5)(2) + (0) = -10

-10 = -10

Since the equation is true, we have found a valid solution.

The surface area of the right triangular pyramid is, 269.5 square units

A triangle is a three sided polygon, which has three vertices and three angles which has the sum 180 degrees.

Given that;

Dimensions of the right triangular pyramid are,

X = 11 units

Y = 10 units

Z = 13 units

Now, The surface area of the right triangular pyramid is,

Area of Lateral triangle = 1/2 × X × Z

                                    = 1/2 × 11 × 13

                                    = 71.5 unit²

And, Area of Base Triangle = 1/2 ·  base ·  height

                                          = 1/2 ·  X ·  Y

                                          = 1/2 ·  11 units · 10 units

                                          = 55 units²

Now, use the method described above to find the surface area of the pyramid.

Surface Area = 3( Area lateral ) + ( Area base )

                    = 3 ( 71.5 square units ) + ( 55 square units )

                   = 269.5 square units

Thus, The surface area of the right triangular pyramid is, 269.5 square units

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Answer:

To find the percent increase in price, we need to calculate the difference between the original price and the new price, and then express that difference as a percentage of the original price.

The original price of the sweatshirt was $40, and the new price is $65, so the difference is:

$65 - $40 = $25

To express this as a percentage of the original price, we divide the difference by the original price and multiply by 100:

($25 / $40) x 100% = 62.5%

Therefore, the percent increase in the price of the sweatshirt is 62.5%.

To cover one suitcase, we need to find the surface area of the suitcase that needs to be covered. The surface area of the suitcase can be calculated by finding the sum of the areas of its six sides.

Area of one side of the suitcase = length x height = 80cm x 48cm = 3840 sq.cm

Area of the opposite side of the suitcase = length x height = 80cm x 48cm = 3840 sq.cm

Area of the other four sides of the suitcase = width x height = 24cm x 80cm + 24cm x 80cm + 24cm x 48cm + 24cm x 48cm = 7296 sq.cm

Total surface area of one suitcase = 3840 sq.cm + 3840 sq.cm + 7296 sq.cm = 14976 sq.cm

To cover 100 such suitcases, we need to multiply the surface area of one suitcase by 100.

Total surface area of 100 suitcases = 14976 sq.cm x 100 = 1497600 sq.cm

To find the amount of tarapaulin required, we need to divide the total surface area of 100 suitcases by the width of the tarapaulin.

Amount of tarapaulin required = (1497600 sq.cm) / (96 cm) = 15600 sq.cm

We now need to convert the required area into meters.

1 sq.cm = 0.0001 sq.m

15600 sq.cm = 15600 x 0.0001 sq.m = 1.56 sq.m

Therefore, we need 1.56 sq.m of tarapaulin to cover 100 such suitcases, assuming that there is no overlap of the tarapaulin.

Answer: The answer should be 35.98 ( or 7π + 14 )

Step-by-step explanation:

The perimeter of a semicircle is half of the circumference plus the diameter. First, we find the circumference, which is (2πr). π * 7 * 2 = 14π. Since we have the circumference, we have to divide it by 2 since it's a semicircle. 14π/2 = 7π. Our next step is to find the diameter. Since the radius of the semicircle is 7, we multiply it by 2. 7 * 2 = 14. Now, let's say that (π = 3.14). So (7 * 3.14) + 14, 21.98 + 14 = 35.98. The answer should be 35.98.

Hope this helps. (and please respond if I'm wrong)

As a result, 198 small bags and 92 big bags of popcorn were sold at the movie theatre.

An equation in mathematics is a claim that two statements are equivalent. It usually has two sections: a left and a right, separated by an equals sign in the middle. For instance, the statement that the expression 2x Plus 3 equals the expression 7 is represented by the equation 2x + 3 = 7. The equation can be used to determine the number of x that causes the equation to hold true when the variable x is unknown. Equations, such as linear equations, quadratic equations, trigonometric equations, and many others, can be used to explain a broad range of mathematical relationships.

given

Let x represent the quantity of big popcorn bags sold and y represent the quantity of small popcorn bags sold.

Based on the knowledge provided, we can create the following system of two equations:

x + y = 290 (the total amount of bags distributed) (the total number of bags sold)

4x + y = 566 (the entire revenue from popcorn sales) (the total revenue from popcorn sales)

We have two options for resolving the equation for x and y: substitution or removal. Here, we'll apply the replacement technique:

Y = 290 - x is the result of solving equation 1. We can enter the following formula in place of y in equation 2:

4x + (290 - x) = 566

If we simplify, we get:

3x + 290 = 566

290 from both parts are subtracted, giving us:

3x = 276

3 divided gives us:

x = 92

Thus, 92 big bags of popcorn were sold. We can change x = 92 into equation 1 to determine how many small packages were sold:

92 + y = 290

92 is subtracted from both parts to arrive at:

y = 198

Thus, 198 small packages of popcorn were sold.

As a result, 198 small bags and 92 big bags of popcorn were sold at the movie theatre.

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The length of the radius and diameter are 10.5 and 21 respectively

The space enclosed by the boundary of a plane figure is called its area. The area of a figure is the number of unit squares that cover the surface of a closed figure. Area is measured in square units like cm² and m². Area of a shape is a two dimensional quantity.

The area of the sector = tetha/360 × πr²

= 72/360 × 3.14 × r²

= 0.628r²

area of the circle = area of the shaded part + area of sector

3.14r² = 277 + 0.628r²

3.14r²-0.628r² = 277

2.512 r² = 277

r² = 277/2.512

r² = 110.3

r = √ 110.3

r = 10.5

d = 2r

d = 10.5 × 2

= 21

therefore the radius and diameter are 10.5 and 21 respectively

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Answer:

Below

Step-by-step explanation:

15 point average for 6 games = 90 points total

   for the final 6 games she can score a total of 90 points to maintain her average of 15 points per game

  there are a LOT of possibilities....here is one

   Pts:   16    14    16   14   16  14    = 90 points (with no 15 point games)