How do I find the X and Y for this equation using elimination method?

6x+6y=54
2x - 6y= 2

Alice will receive £80 and Brian will receive £320

When dividing an amount of money in a given ratio, we need to first determine the total number of parts that the ratio is divided into.

In this case, the ratio between Alice and Brian is 1:4. This means that for every 1 unit of money that Alice receives, Brian receives 4 units of money. Therefore, the total number of parts in this ratio is 1 + 4 = 5.

To divide £400 in the ratio of 1:4, we need to find out how much of the total amount each part represents. To do this, we divide the total amount by the total number of parts:

£400 ÷ 5 = £80

So each part in this ratio represents £80.

Now that we know the value of each part, we can calculate how much Alice and Brian will receive.

Alice's share is one part, which represents £80. Therefore, Alice will receive

1 part x £80 = £80

Brian's share is four parts, which represents 4 x £80 = £320. Therefore, Brian will receive:

4 parts x £80 = £320

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Answer: 9

Step-by-step explanation:

The number that was excluded from the 10 consecutive numbers would be = 228.

Let's take the smallest number of the 10 consecutive number to be = X

Then, the 10 consecutive numbers are x, x+1, x+2, x+3, x+4, x+5, x+6, x+7, x+8, and x+9.

If we exclude one of these numbers, then the sum of the remaining 9 numbers would be:

(x) + (x+1) + (x+2) + (x+3) + (x+4) + (x+5) + (x+6) + (x+7) + (x+8)

Collect the like terms and add up.

= 9x + 36

Recall that the sum of the remaining 9 numbers = 2023.

That is:

= 9X + 36 = 2023

=9x = 1987

x = 221

Therefore, the smallest number in the consecutive sequence is 221, and the 10 numbers are 221, 222, 223, 224, 225, 226, 227, 228, 229, and 230.

If we exclude the number 228, then the sum of the remaining 9 numbers is 2023.

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Answer:

Step-by-step explanation:

The question is illustrated with the attached image.

Angle of elevation is the angle between a line of sight and the horizontal surface.

Let h be the height of the tower

First, calculate distance BC (x).

This is calculated using the following tan ratio,

tan52=h/x

h=xtan52

From the attached image:,

CD=47+x

tan31=h/x+47

h=(x+47)tan31

xtan52=(x+47)tan31,

solving for x we get, x=41.156m

h=xtan52=41.156 * tan52=53.2m

When the smaller circle has a radius οf 6 cm, the area οf the shaded regiοn is 339.3 cm², rοunded tο the nearest tenth.

The cοllectiοn οf all pοints in a plane that are equally spaced frοm a specific pοint knοwn as the centre is referred tο as a circle in geοmetry. It is usually represented by a clοsed, rοunded curve in twο dimensiοns. The radius is the distance acrοss the centre οf the circle, and the diameter is the distance frοm the centre οf the circle tο any spοt οn the curve. The area encircled by a circle is determined by the fοrmula A = r2, where r is the radius. The circumference οf a circle is alsο referred tο as its edge. Circles are a key idea in geοmetry and have many uses in bοth mathematics and daily living.

given:

We must deduct the area οf the smaller circle frοm the area οf the bigger circle in οrder tο determine the area οf the shaded area.

The bigger circle has a 12 cm radius, sο the fοllοwing is its area:

A = πr² = π(12 cm) (12 cm)

A ≈ 452.39 cm²

The smaller circle has a radius οf 6 centimetres, sο the fοllοwing is its area:

A = πr² = π(6 cm) (6 cm)

A ≈ 113.1 cm²

As a result, the shaded regiοn's size is:

113.1 cm² - 339.3 cm² = 452.39 cm²

When the smaller circle has a radius οf 6 cm, the area οf the shaded regiοn is 339.3 cm², rοunded tο the nearest tenth.

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The overall chances of winning the games before playing were 52%, and after playing and winning once but losing twice, the overall chances of winning are 17.33%. This shows that the new information has changed your belief about the probability of winning, and you now suspect that your chances of winning are lower than before.

Before playing the games, the expected value of winning is calculated by multiplying the probability of winning with the corresponding probabilities and adding them together. This is shown below:

E(win) = (0)(0) + (0.1)(0.01) + (0.2)(0.02) + (0.3)(0.04) + (0.4)(0.1) + (0.5)(0.15) + (0.6)(0.2) + (0.7)(0.25) + (0.8)(0.16) + (0.9)(0.04) + (1)(0) = 0.52

After playing the games and winning once but losing twice, the expected value of winning is calculated by multiplying the probability of winning with the corresponding probabilities, and adding them together. However, the probabilities are adjusted based on the new information. The new probabilities are shown below:

P(win) = (0)(0) + (0.1)(0.01)(1/3) + (0.2)(0.02)(1/3) + (0.3)(0.04)(1/3) + (0.4)(0.1)(1/3) + (0.5)(0.15)(1/3) + (0.6)(0.2)(1/3) + (0.7)(0.25)(1/3) + (0.8)(0.16)(1/3) + (0.9)(0.04)(1/3) + (1)(0)(1/3) = 0.17333

Therefore, the overall chances of winning the games before playing were 52%, and after playing and winning once but losing twice, the overall chances of winning are 17.33%. This shows that the new information has changed your belief about the probability of winning, and you now suspect that your chances of winning are lower than before.

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About 5,000 more fans attended the third round finals than the third round time trials.

From the question, we are to find the approximate difference between the attendance of the third round finals and the third round time trials.

From the given data, we have:

Attendance Time             Trials                      Finals

1st round                           12,645                    17,352

2nd round                         16,234                    21,896

3rd round                          18,817                     23,773

Third round finals attendance = 23,773

Third round time trials attendance = 18,817

The difference between these two numbers is:

23,773 - 18,817 = 4,956

Rounding this to the nearest thousand gives:

4,956 ≈ 5,000

Hence, The number of fans that attended the third round finals than the third round time trials is about 5,000

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ABCD is the square base and A is the apex. As you can see, the apex is not directly above the center of the base, which makes this an oblique square pyramid.

An oblique square pyramid is a type of three-dimensional geometry that has a square base and four triangular faces that meet at a point, called the apex, but the apex is not directly above the center of the base. In other words, the pyramid is "tilted" or "leaning" to one side.

The key difference between an oblique square pyramid and a regular square pyramid is the location of the apex. In a regular square pyramid, the apex is directly above the center of the base, while in an oblique square pyramid, the apex is off-center.

Here is a diagram of an oblique square pyramid:

In this diagram, ABCD is the square base and A is the apex. As you can see, the apex is not directly above the center of the base, which makes this an oblique square pyramid.

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Answer:

there is no chart or questions

Step-by-step explanation:

IQR difference = 5

The interquartile range (IQR) is a measure of variability that describes the spread of a set of data. It is calculated by finding the difference between the third quartile (Q3) and the first quartile (Q1) of the data.

The formula for calculating the IQR is:

IQR = Q3 - Q1

The Upper Quartile - Lower Quartile is the definition of the interquartile range.

The answer to the query is

Mount Vernon data set: 55, 60, 65, 70, 75, 80, 85 and 90

Lakewood data set = 65, 70, 75, 80 and 85

Mount Vernon median = 70+75/2 = 77.5

55+60+65+70/4 = 62.5 is the median for the lower half of the collection.

Upper half of set median: 82.5 (75, 80, 85, 90 divided by 4).

Mount Vernon's IQR is 82.5 minus 62.5, or 20.

Likewise, in the instance of Lakewood,

Average: 75

Lower half of the set median equals 65+70/2 = 67.5

Upper half of set median equals 80+85/2 = 82.5

IQR = 82.5 - 67.5 = 15

Hence, IQR difference = 20-15 = 5

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Answer:

The third one

Step-by-step explanation:

The only one which gives the last number of the sequence is the third one as subbing in 16 you get 3×16 + 3 = 48 + 3 = 51

Answer:

The given function is f(x) = √(x-2) - 2.

The graph that represents this function will have the following characteristics:

The domain of the function is x ≥ 2, since the expression inside the square root must be non-negative.

The function approaches the x-axis but never touches it as x approaches positive infinity, since the square root will always be positive.

The function has a vertical asymptote at x = 2, since the expression inside the square root becomes zero at x = 2.

The function has a horizontal asymptote at y = -2, since the square root term dominates the function as x gets large, and the -2 term remains constant.

Based on these characteristics, you can compare the given graphs to see which one matches the given function.

Answer: A maximum height corresponds to:

B. h(t) = 26,200 - 16t^2

A minimum height corresponds to:

C. h(t) = 6 for 7 ≤ t ≤ 8

Height staying the same corresponds to:

D. h(t) = 12 for 2 ≤ t ≤ 3

Starting height corresponds to:

A. h(0) = 7

Using the provided data, we can find the function values that correspond to the given times:

h(1.5) = 26,200 - 16(1.5)^2 = 26,157

h(4) = 16

Therefore, the statement that corresponds to "6-7" is missing from the given options.

Step-by-step explanation:

The Pythagorean Theorem is proven.

The reason that we can make the statement BC/AC = CD/AC is because corresponding sides of similar triangles are proportional. This is represented by option D. Corresponding sides of similar triangles are proportional.

To complete the proof of the Pythagorean Theorem, a² + b² = c², we can use the following steps:

As similar triangles have proportional sides, we can write the proportions AB/AC = AC/BC and AB/BC = BC/AC.
By the cross-product property, AB * BC = AC * AC and AB * AC = BC * BC.
By the addition property of equality, AB² + BC² = AC² + BC².
By the segment addition postulate, AC + BC = c.
By factoring, (AC + BC)² = c².
By the distributive property, AC² + 2*AC*BC + BC² = c².
By rearranging the terms, AC² + BC² = c² - 2*AC*BC.
By substituting the values of AC and BC from the proportions in step 1, we get a² + b² = c² - 2*a*b.
By simplifying, we get a² + b² = c².

Therefore, the Pythagorean Theorem is proven.

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The following functions can be simplify as follows:

(a) f+g=x²+3x+8

(b) f-g=x²-13x-8

(c) fg=x³+3x²-40x-40

(d) f/g= (x-5)/(x+8) domain is x≠-8.

(a) To find f+g, we simply add the two functions together:

f+g=x^{2}-5x+x+8= x^{2}+3x+8

(b) To find f-g, we subtract g from f:

f-g=x^{2}-5x-(x+8)= x^{2}-6x-8= x^{2}-13x-8

(c) To find fg, we multiply the two functions together

:fg=(x^{2}-5x)(x+8)= x^{3}+3x^{2}-40x-40

(d) To find f/g, we divide f by g:

f/g= (x^{2}-5x)/(x+8)= (x-5)/(x+8)

The domain of this function is all real numbers except for -8, since dividing by zero is undefined. So the domain is x≠-8.

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When a=6, the value of b is equals to -43.

What is Algebraic expression ?

Algebraic expression can be defined as combination of variables and constants.

An algebraic expression is a combination of variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division, which can be simplified and evaluated.

In other words, an algebraic expression is a collection of terms and coefficients that are connected by mathematical operators.

Substitute the value of a=6 into the expression for b:

b = -1 - 7a

b = -1 - 7(6)

b = -1 - 42

b = -43

Therefore, when a=6, the value of b is -43.

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We can conclude that the Ratio of arc = scale factor of dilation.

An arc in mathematics is a section of a circle's or curve's perimeter. An open curve is another name for it.

The circumference of a circle, sometimes referred to as its perimeter, serves as its boundary. The distance between any two locations traced along the circle of an arc is hence its length.

Given : Radius of original circle A = 3

            Radius of Dilation circle B = 9

We know that, Scale factor of dilation =

Dimension of Dilation shape / Dimension of original shape

So, Scale factor of given dilation = Radius of Circle B / Radius of Circle A

                                                      = 9/3

                                                      = 3.

Now, we know that arc of a circle can be found by using formula:

= Ф × π/180° × r

Arc of Circle A=  90 × π/180 × 3

                       = 3π/2

Arc of Circle B = 90 × π/180 × 9

                        = 9π/2

So, Ratio of arc = Arc of Circle B/Arc of Circle A

                         = 9π/2 ÷ 3π/2 = 3.

Hence, we can see that Ratio of arc = scale factor of dilation.

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Answer:

1/2

Step-by-step explanation:

Our answer options are: 0, 1, 1/2

0 = 0/100

1 = 100/100

1/2 = 50/100

Comparing the 3 options, we see that 1/2 is the closest to 48/100!

So, the answer is 1/2

The value of x in the triangle given the midsegment points and sections is 1.35 units

The mid-segment of a triangle (also called a midline) is a segment joining the midpoints of two sides of a triangle.

The midsegments of triangle UWY are VR, VZ, ZR

To find the value of x, we use a theorem called the mid segment theorem which states that:

"The mid-segment of a triangle, which joins the midpoints of two sides of a triangle, is parallel to the third side of the triangle and half the length of that third side of the triangle."

The third side of triangle UWY is WY and it measures 2.7.

Therefore, x will be 2.7 divided by 2 2.7/2 which will give us the value 1.35 i.e. x = 1.35

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The sum of number is 270, after adding 5 to each number , sum of numbers is 320 and mean is 32.

The mathematical average of a group of two or more numbers is arithmetic mean, add the numbers in a set together and divide by the total number of numbers in the set.

Here the mean of 10 number is 27. We know that ,

[tex]mean=\frac{sum of numbers}{total numbers}\\[/tex]

[tex]27= \frac{sum of numbers}{10}[/tex]

=sum of numbers = 27*10=270.

Now 5 added to each number, we need to add 5 in 10 times( because 10 total number), Then 5*10=50.

Sum of numbers after adding 5 to each number [tex]270+50=320[/tex]

Now, [tex]mean=\frac{320}{10}=32[/tex]

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When BD is perpendicular tο AC, the value οf x is fοund tο be 19°.

When twο lines crοss at a straight angle οr 90 degrees, perpendicular lines are created. Perpendicularity is the name given tο this characteristic οf lines. A straight line that fοrms a right angle (90 degrees) with anοther line is referred tο as being perpendicular.

In οther wοrds, twο lines are perpendicular tο οne anοther if they cοnnect at a right angle. The term "perpendicular tο all pοints in the plane" οr "perpendicular tο each line it intersects" is used tο describe a line that is perpendicular tο the plane.  Perpendicular lines always intersect at 90 degrees but nοt all intersecting lines are perpendicular.

Given a vectοr diagram.

It is given that BD is perpendicular tο AC.

m∠CBE = (5x - 42)°

m∠CBE = (2x - 1)°

Since BD is perpendicular tο AC,

m∠DBC = m∠DBA = 90°

Nοw,

m∠DBC = 90°

m∠CBE + m∠CBE = m∠DBC

Then we can write,

m∠CBE + m∠CBE =  90°

(5x - 42)° +  (2x - 1)° = 90°

7x - 43 = 90

7x = 133

x = 133 / 7 = 19°

Therefοre when BD is perpendicular tο AC, the value οf x is fοund tο be  19°.

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Answer:

x= 27.4

Step-by-step explanation:

a triangle's angles always equal 180 so

34.6+118+x=180

add 34.6 and 118 to get

152.6+x=180

subtract both sides by 152.6 to get

x=27.4

The factors of the form (x - c) are (x - 2) and (x² + 49).

To factor the polynomial f(x) = x³ - 2x² + 49x - 98 into factors of the form (x - c), we can use synthetic division with the given zero of 2.

2 | 1 -2 49 -98
  |     2  0  98
    1  0 49   0

The result of the synthetic division gives us the quotient (x² + 49) and a remainder of 0, confirming that 2 is indeed a zero of the polynomial.

Now we can write the polynomial as the product of (x - 2) and the quotient (x² + 49):

f(x) = (x - 2)(x² + 49)

Since the quadratic factor (x² + 49) cannot be factored further using real numbers, the final factorization of the polynomial is:

f(x) = (x - 2)(x² + 49)

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The simplified form is 3/(x+7) + 14/(x)(x+7).

Simplified form of a fraction is the form of a fraction in which the numerator and denominator are in their lowest form, or the greatest common factor has been taken out of both the numerator and denominator. For example, the fraction 24/36 can be simplified to 2/3.

To subtract the two fractions, we need to find a common denominator. The common denominator of (x+7) and (x) is (x)(x+7). We can then rewrite the two fractions with this common denominator and subtract the numerators:

(x+8)/(x+7) - (x-2)/(x) = (x+8)(x)/(x)(x+7) - (x-2)(x+7)/(x)(x+7)

= (x^2+8x)/(x^2+7x) - (x^2-2x+7x-14)/(x^2+7x)

= (x^2+8x - x^2+2x-7x+14)/(x^2+7x)

= (3x+14)/(x^2+7x)

= 3x/(x^2+7x) + 14/(x^2+7x)

= 3/(x+7) + 14/(x)(x+7)

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Part A: In this situation, a Type II error would take place if the council failed to reject the null hypothesis even if it was untrue (i.e., less than 40% of children under the age of 5 could pass a swim test).

If the researcher does not reject a null hypothesis that is actually wrong in the population, this is known as a type II error (false-negative). Notwithstanding the fact that type I and type II mistakes cannot be completely prevented, the researcher can lessen their risk by increasing the sample size.

from the question:

Part A: In this situation, a Type II error would take place if the council failed to reject the null hypothesis even if it was untrue (i.e., less than 40% of children under the age of 5 could pass a swim test). This would result in a lost chance to provide these kids with more swim safety training, perhaps placing them in danger of drowning or other swimming-related mishaps.

Part B: We are unable to reject the null hypothesis since the p-value (0.8438) exceeds the significance level (0.05). This indicates that there is insufficient information to draw the conclusion that less than 40% of children under the age of five can pass a swim test. But, since the test only looked at the alternative hypothesis that the fraction is less than 40%, we cannot draw the conclusion that it is exactly 40%.

Part C: One possible defect in the study is the use of a volunteer sample. The children who volunteered to take the swimming test may not be representative of the entire population of children under 5 in Bloomburg City. For example, parents who are more concerned about their children's swimming abilities may be more likely to volunteer their children for the test, leading to a biased sample. To obtain a more representative sample, a random sample of children under 5 could be selected from the population and asked to take the swimming test.

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Answer:

20%

Step-by-step explanation:

600÷3 of 100 = 20%

600/3 of 100 = 20%

The answer is f(-x) = x^4 + 6x + 2 and the function is neither even nor odd.

To find f(-x), we simply substitute -x for x in the original function:

f(-x) = (-x)^4 - 6(-x) + 2 = x^4 + 6x + 2

Now, to determine if f is even, odd, or neither, we compare f(x) and f(-x). If f(x) = f(-x), then the function is even. If f(x) = -f(-x), then the function is odd. If neither of these conditions are met, then the function is neither even nor odd.

In this case, f(x) = x^4 - 6x + 2 and f(-x) = x^4 + 6x + 2. These are not equal, so the function is not even. However, if we multiply f(-x) by -1, we get:

-f(-x) = -x^4 - 6x - 2

This is also not equal to f(x), so the function is not odd either. Therefore, the function is neither even nor odd.

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[tex]\huge\begin{array}{ccc}a_1=-2\\a_2=1\\a_3=6\\a_{10}=97\end{array}[/tex]

[tex]a_n=n^2-3[/tex]

Find the first 3 terms and the 10th term.

Substitute

n = 1, n = 2, n = 3 and n = 10:

[tex]a_1=1^2-3=1-2=-2\\\\a_2=2^2-3=4-3=1\\\\a_3=3^2-3=9-3=6\\\\a_{10}=10^2-3=100-3=97[/tex]