Consider the equality xy=k. Write the following inverse proportion: y is inversely proportional to x. When y = 6, x = 3.
3/1 =k/6

1/6 = k/3

6/1 = 1/6

(You could do this shorter, but by the time i realized that it was too late.)

First, we need one of the variables (x or y) to have the same coefficient.
Lets use the variable y, since it uses smaller numbers.

Multiply the first equation by the denominator of y, which is 3. Then multiply the second equation by the denominator of y in the second equation, which is 4.

You get:
1st equation: [tex]\frac{3}{2} x+ y = 27[/tex]
2nd equation: [tex]\frac{12}{5}x - 3y=-12[/tex]
Now we need to multiply the first equation by 3, so we can have "3y" in both of the equations.
1st equation: 9/2x + 3y = 81
2nd equation: [tex]\frac{12}{5}x - 3y=-12[/tex]
Now we can subtract both of the equations.
12/5x + 9/2x = 69 We need to make the common denominator for x.
24/10x + 45/10x = 69
69/10x=69
x=10
Now we substitute x into the first equation (or the second, doesn't matter).
1/2 * 10 + 1/3y=9
5 + 1/3y = 9
1/3 y = 4
y = 12

Answer:

(10, 12 )

Step-by-step explanation:

let's begin by clearing the fractions from both equations

[tex]\frac{1}{2}[/tex] x + [tex]\frac{1}{3}[/tex] y = 9 ( multiply through by 6 ( the LCM of 2 and 3 to clear ) )

3x + 2y = 54 → (1)

[tex]\frac{3}{5}[/tex] x - [tex]\frac{3}{4}[/tex] y = - 3 ( multiply through by 20 ( the LCM of 5 and 4 to clear ) )

12x - 15y = - 60 → (2)

multiplying (1) by - 4 and adding to (2) will eliminate x )

- 12x - 8y = - 216 → (3)

add (2) and (3) term by term to eliminate x

0 - 23y = - 276

- 23y = - 276 ( divide both sides by - 23 )

y = 12

substitute y - 12 into either of the 2 equations and solve for x

substituting into (1)

3x + 2(12) = 54

3x + 24 = 54 ( subtract 24 from both sides )

3x = 30 ( divide both sides by 3 )

x = 10

solution is (10, 12 )

The equation of the line in the graph given is: y = -3x - 1.

Find the slope of the line, which is: m = rise/run.

Rise of the line = 3 units

Run = 1

Slope (m) = -3/1 = -3

Y-intercept (b) = -1 (at this point, x equals zero)

Substitute m = -3 and b = -1 into y = mx + b

y = -3x + (-1)

y = -3x - 1

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The correct statement about the earthquake in the state is option c. State A had approximately 3,362 more earthquakes than State B.

we have x/y = 0.00299

y = 163696

To solve for x we have

163696 * 0.00299

= 4895 earthquakes

x = 0.1402 x 10931

= 1533

Next we have to find the difference

4895 - 1533 = 3362 earthquakes.

We have to conclude that state A has 3362 earthquakes more than B. Hence the answer is c.

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Complete question

The seismic activity density of a region is the ratio of the number of earthquakes during a given time span to the land area affected. The table shows the land area and seismic activity density.

Which statement about the number of earthquakes the states had for the given time span is true?

State A had approximately 1,533 more earthquakes than State B.

State B had approximately 1,533 more earthquakes than State A.

State A had approximately 3,362 more earthquakes than State B.

State B had approximately 3,362 more earthquakes than State A.

Answer:

Hence, 0.026 can be expressed as [tex]$2.6 \times 10^{-2}$[/tex].

Step-by-step explanation:

- Given 0.026

- Use given, move the decimal point so that first factor is greater than or equal to 1 but less than 10 .

- Then count n and write in scientific notation.

Step 1 of 1

Consider 0.026

[tex]$$\Rightarrow 2.6$$[/tex]

Decimal has moved 2 places to right.

The power will be negative as original no. is less than 1 .

[tex]$$\begin{aligned}&2.6 \times 10^{-2} \\&0.026=2.6 \times 10^{-2} .\end{aligned}$$[/tex]

Answer:

261.81818181

Step-by-step explanation:

400÷275=x

x×180

Answer:

If 275 gallon of oil tank costs $400 to fill.

Then 180 gallon of oil tank costs $261.8 to fill.

Step-by-step explanation:

Step 1 of 2

If 275  gallon of oil tank costs $400  to fill.

Then the cost to fill 180  gallon of oil tank can be found by forming a proportion.

Let the required cost be x.

[tex]$$\begin{aligned}\frac{\text { cost }}{\text { Gallons of Gas }} &=\frac{\text { cost }}{\text { Gallons of Gas }} \\\frac{\$ 400}{275} &=\frac{x}{180}\end{aligned}[/tex]

Multiplying both sides by 180 we get,

[tex]$$\begin{aligned}\frac{\$ 400}{275} \times 180 &=\frac{x}{180} \times 180 \\x &=\frac{\$ 400}{55} \times 36 \\x &=\$ 261.8\end{aligned}$$[/tex]

Step 2 of 2

To check if the answer is reasonable, we substitute it back in the formed proportion

[tex]$\frac{\$ 400}{275}=\frac{x}{180}$$[/tex]

We found x=$261.8 hence,

[tex]$\frac{\$ 400}{275}=\frac{\$ 261.8}{180}$$$\$ 1.45=\$ 1.45$$Here, $L H S=R H S$[/tex]

Hence, our answer is correct.

Using proportions, it is found that the value of x is of x = 5, hence option A is correct.

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

Since the triangles are similar, the lengths are proportional. Researching the problem on the internet, we have that the proportions are given as follows:

Hence:

[tex]\frac{x}{25} = \frac{5}{25}[/tex]

Simplifying the denominators:

x = 5.

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A table can be represented with a linear function equation as y = mx + b, where m is the slope and b is the y-intercept.

Assuming we have a table of values as shown in the image attached below, to write an equation of linear function for the table, do the following:

Pick two pairs of values, say, (1, 5) and (2, 25) and find the slope (m):

Slope (m) = change in y / change in x = (25 - 5)/(2 - 1)

Slope (m) = 20

Find the y-intercept (b) by substituting (x, y) = (1, 5) and m = 20 into y = mx + b:

5 = 20(1) + b

5 = 20 + b

5 - 20 = b

-15 = b

b = -15

Write the equation of the linear function by substituting m = 20 and b = -15 into y = mx + b:

y = 20x - 15

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Answer:

If the population of the United States on July 4,2010 was almost 310000000 then, the number in scientific notation is [tex]$3.1 \times 10^{8}$[/tex].

Step-by-step explanation:

- Given

Population of the United States on July 4,2010 was almost 310000000 .

- To write the number in scientific notation.

- Firstly, move the decimal point so that the first factor is greater than or equal to 1 but less than 10 .

- Then, count the number of decimal places, n, that the decimal point was moved.

- Then, write the number as a product with a power of 10.

- Finally, check the scientific notation.

Step 1 of 2

Moving the decimal point-

Move the decimal after 3 . so that 3.10000000 is between 1 and 10 .

Now, we know the decimal point was moved 8 places to the left.

Step 2 of 2

Writing the number as a product with a power of 10 -

Since, 310000000 is greater than 1 so the power of 10 will have the exponent 8 .

Therefore, the number becomes-

[tex]$$31000000=3.1 \times 10^{8}$$[/tex]

Now, checking the scientific notation-

[tex]$$\begin{gathered}3.1 \times 10^{8}=3.1 \times 100000000 \\=310000000\end{gathered}$$[/tex]

See below for the calculations of the slopes of the graphs

The slope of a line is calculated using:

m= (y2 - y1)/(x2 - x1)

Using the above formula, we have:

Line 1: (-2, 0) and (3, 2)

Slope, m= (2 - 0)/(3 + 2)

m= 2/5

Hence, the slope is 2/5

Line 2: (2, -3) and (-2, 4)

Slope, m= (4 + 3)/(-2 - 2)

m= -7/4

Hence, the slope is -7/4

Line 3: (-4, -2) and (1, 3)

Slope, m= (3 + 2)/(1 + 4)

m= 1

Hence, the slope is 1

Line 4: (0, 0) and (-3, -4)

Slope, m= (-4 - 0)/(-3 - 0)

m= 4/3

Hence, the slope is 4/3

Line 5: (0, 0) and (-1, -4)

Slope, m= (-4 - 0)/(-1 - 0)

m= 4

Hence, the slope is 4

Line 6: (-2, 1) and (3, 2)

Slope, m= (2 - 1)/(3 + 2)

m= 1/5

Hence, the slope is 1/5

Line 7: (-2, -1) and (2, -4)

Slope, m= (-4 + 1)/(2 + 2)

m= -3/4

Hence, the slope is -3/4

Line 8: (-2, -3) and (-1, -4)

Slope, m= (-4 + 3)/(-1 + 2)

m= -1

Hence, the slope is -1

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Answer:

HI: 17.9

GH: 22.1

Step-by-step explanation:

1) There are three trigonometric ratios for right-angled triangles.

Sin = opposite/hypotenuse

Cos = adjacent/hypotenuse

Tan = opposite/adjacent.

2) Opposite to the 90° lies the hypotenuse. Opposite to the given angle lies the opposite.

Beside the given angle lies the adjacent.

3) The value of G given to us is 54°. The length of GI is 13. We are asked to find the lengths of HI and GH. We cannot find GH (we can, but I prefer the current method) without the length of HI. Let's find HI.

Tan(54) = x/13

Tan(54) × 13 = x

x = 17.89

4) We can use the Pythagorean theorem to find the length of GH. His theorem is c² = a² + b².

c² = a² + b²

c² = 13² + 17.89²

c² = 489.0521

c = √489.0521

c = 22.11

5) Round off the answers to the nearest tenth.

HI = 17.9

GH = 22.1

The minimum size of the sample required to ensure that the estimate has an error of at most 0.14 at the 98% level of the confidence interval is 791.

The standard deviation is given as (σ) = 1.69.

The mean number of dresses given (μ) = 7.6.

Margin of error given (M.E.) = 0.14.

Confidence level given = 98%.

Z-Score corresponding to 98% confidence interval (Z) = 2.33.

We are asked to find the minimum size of the sample required to ensure that the estimate has an error of at most 0.14 at the 98% level of the confidence interval.

We assume the size of the sample to be n.

By the formula of Margin of Error:

M.E. = Z*(σ/√n).

Substituting the values, we get:

0.14 = 2.33*(1.69/√n),

or, √n = 2.33*1.69/0.14 = 28.126429,

or, n = 791.096 ≈ 791 (As sample size needs to be a whole number).

Thus, the minimum size of the sample required to ensure that the estimate has an error of at most 0.14 at the 98% level of the confidence interval is 791.

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Answer:

see explanation

Step-by-step explanation:

(a)

x² - 36 = 0 ← is a difference of squares and factors as

(x - 6)(x + 6) = 0

equate each factor to zero and solve for x

x + 6 = 0 ⇒ x = - 6

x - 6 = 0 ⇒ x = 6

(b)

x² - 5x + 4 = 0

consider the product of the factors of the constant term (+ 4) which sum to give the coefficient of the x- term (- 5)

the factors are - 1 and - 4 , since

- 1 × - 4 = + 4 and - 1 - 4 = - 5 , then

(x - 1)(x - 4) = 0 ← in factored form

equate each factor to zero and solve for x

x - 1 = 0 ⇒ x = 1

x - 4 = 0 ⇒ x = 4

(c)

x² - 2x = 3 ( subtract 3 from both sides )

x² - 2x - 3 = 0 ← in standard form

consider the product of the factors of the constant term (- 3) which sum to give the coefficient of the x- term (- 2)

the factors are + 1 and - 3 , since

1 × - 3 = - 3 and 1 - 3 = - 2 , then

(x + 1)(x - 3) = 0 ← in factored form

equate each factor to zero and solve for x

x + 1 = 0 ⇒ x = - 1

x - 3 = 0 ⇒ x = 3

(d)

6x² - 11x - 10 = 0

consider the product of the factors of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.

product = 6 × - 10 = - 60 and sum = - 11

the factors are + 4 and - 15

use these factors to split the x- term

6x² + 4x - 15x - 10 = 0 ( factor the first/second and third/fourth terms )

2x(3x + 2) - 5(3x + 2) = 0 ← factor out (3x + 2) from each term

(3x + 2)(2x - 5) = 0

equate each factor to zero and solve for x

3x + 2 = 0 ⇒ 3x = - 2 ⇒ x = - [tex]\frac{2}{3}[/tex]

2x - 5 = 0 ⇒ 2x = 5 ⇒ x = [tex]\frac{5}{2}[/tex]

Answer:

x = 6 cm

Step-by-step explanation:

• in the parallelogram, if we consider the side of length 12

  as the base then the corresponding height is 5.

In this case the area of our parallelogram = 5 × 12 = 60 cm²

………………………………………………

• in the parallelogram, if we consider the side of length 10

  as the base then the corresponding height is x.

In this case the area of our parallelogram = 10 × x = 10x cm²

………………………………………………

In order to determine x ,we equate the two different results

that we got for the same area .

In other words ,we have to solve the equation 10x = 60.

10x = 60

⇔ x = 60/10 = 6

Answer:

Step-by-step explanation:

the 2 triangles are similar, we can solve with an equation

12 : 10 = x : 5

x = 12 * 5 : 10

x = 60 : 10

x = 6 cm

Answer:

[tex]y=\dfrac {60} {x}[/tex]   or   [tex]xy=60[/tex]   (depending on your teacher's format preference)

Step-by-step explanation:

Proportionality is sometimes called "variation".   (ex. " 'y' varies inversely as 'x' ")

There are two main types of proportionality/variation:

Every proportionality, regardless of whether it is direct or inverse, will have a constant of proportionality (I'm going to call it "k").

Below are several different examples of both types of proportionality, and how they might be stated in words:

From these examples, we see that two things:

In our question, y is inversely proportional to x, so the equation we're looking at is the following [tex]y=\dfrac {k} {x}[/tex].

It isn't yet clear what the constant of proportionality "k" is for this situation, but we are given enough information to solve for it:  "When y=12, x=5."

We can substitute this known relationship pair, and find the "k" that relates this pair of numbers:

General Inverse variation equation...

[tex]y=\dfrac {k} {x}[/tex]

Substituting known values...

[tex](12)=\dfrac {k} {(5)}[/tex]

Multiplying both sides by 5...

[tex](12)*5= \left ( \dfrac {k} {5} \right ) *5[/tex]

Simplifying/arithmetic...

[tex]60=k[/tex]

So, for our situation, k=60.  So the inverse proportionality relationship equation for this situation is [tex]y=\dfrac {60} {x}[/tex].

The way your question is phrased, they may prefer the form: [tex]xy=60[/tex]

Answer: x=9.

Step-by-step explanation:

Triangle ABC is similar to triangle FED     ⇒

[tex]\frac{77}{21} =\frac{11x+11}{30} \\\\\frac{7*11}{7*3}=\frac{11*(x+1)}{30} \\\\\frac{11}{3}*30 =11*(x+1)\\\\\frac{11*3*10}{3} =11*(x+1)\\\\11*10=11*(x+1)\\10=x+1\\9=x.[/tex]

Good luck an' have a nice day!

The domain of the function f(x) is: -6 < x ≤ 4, and the value that is in the domain of the function f(x) is 4

The function is given as:

f(x) = 2x + 5,   -6 < x ≤ 0

f(x) = 2x + 3,   0 < x ≤ 4

The above means that the domain of the function f(x) is:

-6 < x ≤ 0 and 0 < x ≤ 4

When combined, we have:

-6 < x ≤ 4

This means that x is greater than -6 but does not exceed 4

Hence, the value that is in the domain of the function f(x) is 4

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Answer:

4

Step-by-step explanation:

got it right on edge

Answer:

h ≤ 70 I'm pretty sure I could be wrong

The correct inequality for the maximum height, h, of a fighter pilot is h ≤ 77.

Given that the height of the fighter pilot (h) must be less than or equal to 77 inches.

The symbol "≤" represents "less than or equal to," and 77 inches is the maximum allowable height for a fighter pilot.

The inequality h ≥ 77 would be incorrect since it states that the height of the fighter pilot should be greater than or equal to 77 inches, which would not be a maximum height requirement.

Similarly, the inequality h ≤ 70 would also be incorrect as it would imply a height limit of 70 inches, which is lower than the actual maximum height allowed.

Lastly, h ≥ 70 would not be suitable as it would permit heights greater than or equal to 70 inches, potentially exceeding the specified maximum height of 77 inches.

In conclusion, the correct inequality to represent the maximum height of a fighter pilot is h ≤ 77, ensuring that their height does not exceed 77 inches.

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Answer:

1?

Step-by-step explanation:

The image of G when A IMG is rotated 180 around the origin is (-2,-4).

To rotate a figure 180 degrees around the origin, we reverse the signs of both the x-coordinate and the y-coordinate. In the image, the point G has coordinates (2,4). Reversing the signs of these coordinates gives us (-2,-4).

Rotate the figure 180 degrees around the origin. This means that we imagine the figure being flipped over the origin.

Reverse the signs of both the x-coordinate and the y-coordinate of the point G. This is because when we rotate a figure 180 degrees around the origin, the signs of both the x-coordinate and the y-coordinate are reversed.

The new coordinates of G are the coordinates of the point that is the result of rotating the figure 180 degrees around the origin and reversing the signs of the coordinates of point G. In this case, the new coordinates of G are (-2,-4).

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Answer:5

Step-by-step explanation:

Answer:0

Step-by-step explanation:

What would be the effect of this change is: a). both area rate and flow rate would increase.

Assuming a driver shift into third gear in which there was reduction in the engine speed while on the other hand the tractor speed increase.

The effect of the change will result in the increase in area rate as well as the  flow rate.

Therefore the correct option  is A.

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The quantities which are squares or multiple of linear things twice grow by square of scale factor. The volume of rectangular prism A = 64 m³

Suppose a figure (pre image) is dilated (dilated image) by scale factor of k.

So, if a side of the figure is of length L units, and that of its similar figure is of M units, then:

L = k × M

where 'k' will be called as scale factor.

The linear things grow linearly like length, height etc.

The quantities which are squares or multiple of linear things twice grow by square of scale factor. Thus, we need to multiply or divide by k² to get each other corresponding quantity from their similar figures' quantities.

So, area of first figure = k² × area of second figure

Similarly, Volume of first figure = k³ × volume of second figure.

It is because we will need to multiply 3 linear quantities to get volume, which results in k getting multiplied 3 times, thus, cubed.

Given that the Rectangular prism B is the image of rectangular prism A after dilation by a scale factor of 1/2.

Scale factor =  (Length of rectangular prism B)/(Length of rectangular prism A)

1/2 = (Length of rectangular prism B)/(Length of rectangular prism A)

Now, the volume of the rectangular prism can be written as,

(Scale factor)³ = (Volume of rectangular prism B)/(Volume of rectangular prism A)

(1/2)³ = 8 m³ /(Volume of rectangular prism A)

The volume of rectangular prism A = 64 m³

Hence, The volume of rectangular prism A = 64 m³

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Answer:

its an odd number

Step-by-step explanation:

If the function is vertically compressed, the resulting function will be g(x) = 3/4x^2

Quadratic functions are functions that has a leading degree of 2. Given the parent function f(x) = ax^2

where

2 is the exponent/degree

If the function is vertically compressed, the value of a must be less than 1, hence the possible expression when vertically compressed is g(x) = 3/4x^2

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Answer: 8.2 mm

Step-by-step explanation:

[tex]\sin 60^{\circ}=\frac{v}{9.5}\\\\v=9.5 \sin 60^{\circ} \approx \boxed{8.2 \text{ mm}}[/tex]

Answer:

none of these are correct

Step-by-step explanation:

The equation represented by the model is 3x²-4x+1=(3x-1)(x-1).

Given model represents a polynomial of the form ax²+bx and model is in figure.

Consider the given table.

The first row in the table represents first term of the polynomial.

In first row first three terms are variables and last term are constant.

Write all the terms of the first row in the form of sum.

+x+x+x-1=3x-1

The first column in the table represents second term of the polynomial.

In first column first term are variable and last term are constant.

Write all the terms of the first column in the form of sum.

+x-1=x-1

The product of first term of polynomial (3x-1) and second term of polynomial (x-1) is equal to the sum of all remaining terms in this table.

+x²+x²+x²-x-x-x-x+1=3x²-4x+1.

We can also check this by multiplying (3x-1) and (x-1) as

(3x-1)(x-1)=3x(x-1)-1(x-1)

(3x-1)(x-1)=3x(x)-3x(1)-1(x)+1(1)

(3x-1)(x-1)=3x²-3x-x+1

(3x-1)(x-1)=3x²-4x+1

Hence, the equation represented by the given model in the form of polynomial ax²+bx is (3x-1)(x-1)=3x²-4x+1.

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The correct option is (A). The factored form of a-b is (5-3p⁴)(25+15p⁴+9p⁸).

Given that A and B are monomials where a = 125 and b = 27p¹².

Monomial expressions include only one non-zero term. Numbers, variables, or multiples of numbers and variables are all examples of monomials.

Firstly, substitute a=125 and b = 27p¹² into a-b, we get

a-b=125-27p¹²        ......(1)

As we know, 125=(5)³, 27p¹²=(3p⁴)

So, equation (1) can be rewritten as

a-b=(5)³-(3p⁴)

Now, apply a³-b³=(a-b)(a²+ab+b²).

a³-b³=(5-3p⁴)(5²+5(3p⁴)+(3p⁴)²)

Further, Simplify using exponent rule with the same exponent (ab)ⁿ=aⁿbⁿ.

a³-b³=(5-3p⁴)(5²+5×3p⁴+3²×(p⁴)²)

Furthermore, calculate the power, we get

a³-b³=(5-3p⁴)(5²+5×3p⁴+9(p⁴)²)

Then, Simplify using exponent power rule (aˣ)ⁿ=aˣⁿ, we get

a³-b³=(5-3p⁴)(5²+5×3p⁴+9p⁸)

Now, multiply the monomials, we get

a³-b³=(5-3p⁴)(5²+15p⁴+9p⁸)

Further, calculate the power, we get

a³-b³=(5-3p⁴)(25+15p⁴+9p⁸)

Finally, reorder the expressions, we get

a³-b³=(5-3p⁴)(9p⁸+15p⁴+25)

Hence, the factored form of a-b where a and b monomials and a = 125 and b = 27p¹² is (5-3p⁴)(9p⁸+15p⁴+25).

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Answer:a

Step-by-step explanation:

i just did it