please help me find this answer
PLEASE IM BEGGING​

Answer:

option (1)

Step-by-step explanation:

rearrange making x the subject, then x is the inverse

y = \(\frac{3}{2}\) x ( multiply both sides by 2 to clear the fraction )

2y = 3x ( isolate x by dividing both sides by 3 )

\(\frac{2}{3}\) y = x

change y back into terms of x , then inverse is

\(f^{-1}\) (x) = \(\frac{2}{3}\) x , or

y = \(\frac{2}{3}\) x

Answer:

C I believe

Step-by-step explanation:

Answer:

x=1.4

Step-by-step explanation:

add 3x to both sides to get 15x-15=6

Then add 15 to both sides to get 15x=21

Then divide by 15 on both sides to get x=1.4

Answer:

x = 7/5

Step-by-step explanation:

Step 1: Write out equation

12x - 15 = 6 - 3x

Step 2: Add 3x to both sides

15x - 15 = 6

Step 3: Add 15 to both sides

15x = 21

Step 4: Divide both sides by 15

x = 7/5

Answer:

7 hot dogs

Step-by-step explanation:

Set up an equation:

2.5x + 1.25 = 21

2.5x = 19.75

x = 7.9

You cannot buy .9 of a hot dog, so the answer is 7

Answer:

y=2/2 x -800

Step-by-step explanation:

if you look the line intercepts Y at -800 and slope form is y=mx+b and B is your Y-intercept so you can easily find that. Now the next time the line touches a point on the graph is 2 points up and 2 points to the right, so your slope is 2/2. Remember your slope is always rise over run.

The Chi-square test is a statistical test used to determine if there is a significant difference between observed and expected frequencies in categorical data. In this example, the test is used to assess whether there is a significant difference in the mean breaking strengths of two types of cables.

The Chi-square test of significance is employed when dealing with categorical or nominal data. It compares the observed frequencies with the frequencies that would be expected if the variables were independent. In this case, the breaking strengths of the two cables are the variables of interest.

To perform the test, the first step is to define the null hypothesis (H0) and the alternative hypothesis (Ha). In this example, H0 assumes that there is no difference in the mean breaking strengths of the two cables, while Ha suggests that there is a difference.

Next, the test statistic, denoted by X2 (chi-square), is calculated using the formula X2 = Σ[(O - E)²/E], where O represents the observed frequencies and E represents the expected frequencies under the assumption of independence.

To determine the expected frequencies, we need to estimate the means and variances of the breaking strengths. Here, x = 1925 and sigma = 40 for the first cable, and x = 1905 and sigma = 30 for the second cable.

Once the test statistic is calculated, it is compared to a critical value from the Chi-square distribution with degrees of freedom equal to (r - 1)(c - 1), where r is the number of rows and c is the number of columns in the contingency table. The significance level of 0.01 determines the critical value.

If the calculated X2 value is greater than the critical value, we reject the null hypothesis and conclude that there is sufficient evidence to indicate a difference in the mean breaking strengths of the two cables. Conversely, if the calculated X2 value is less than or equal to the critical value, we fail to reject the null hypothesis and conclude that there is no significant difference.

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Answer:

106

Step-by-step explanation:

See attached

Answer:

m<PQR = 18.7°

Step-by-step explanation:

Apply the Law of Sines,

\( \frac{Sin A}{a} = \frac{Sin B}{b} \)

Where,

Sin A = Sin 140

a = 100 m

Sin B = Sin R (<PRQ)

b = 50 m

Substitute

\( \frac{Sin 140}{100} = \frac{Sin R}{50} \)

Cross multiply

\( 100*Sin(R) = 50*Sin(140) \)

Divide both sides by 100

\( Sin(R) = \frac{50*Sin(140)}{100} \)

\( Sin(R) = 0.32139 \)

\( R = Sin^{-1}(0.32139) \)

R ≈ 18.7° (nearest tenth)

m<PQR = 18.7°

The angle PRO is 1.7 degrees.

Given that,

The diagram shows three points P, Q, and R on horizontal ground.

PQ = 50 m, PR = 100 m and angle PQR = 140°.

We have to determine,

The angle PRO.

According to the question,

The value of angle PRO is determined by using the sin rule-following all the steps given below.

\(\rm \dfrac{sina}{a} = \dfrac{sinb}{b}\)

Where,  Sin A = Sin 140 , a = 100 m , Sin B = Sin R (<PRQ) , b = 50 m

Substitute all the values in the formula,

\(\rm \dfrac{sin140}{100} = \dfrac{sinR}{50}\\\\ \dfrac{0.64}{100} = \dfrac{sinR}{50}\\\\0.0064 = \dfrac{sinR}{50}\\\\0.0064 \times 50 = sinR\\\\0.321 = sinR\\\\R = sin{-1}(0.321)\\\\R = 18.7 \ degree\)

Hence, The angle PRO is 1.7 degrees.

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Answer:

1/2

Step-by-step explanation:

hope it helps :)

In mathematics, inequalities specify the connection between two non-equal numbers. Equal does not imply inequality. Typically, we use the "not equal sign ()" to indicate that two values are not equal. But several inequalities are utilized to compare the numbers, whether it is less than or higher than.

Given few inequalities and some operations are performed on them

For first inequality:

=> 4 < 7

Multiply both sides by 3, then by 2, then by 4, then by 9

=> 4 *3 * 2 * 4 * 9 < 7  *3 * 2 * 4 * 9

=> 864 < 1512

there is no change in the inequality sign and it is still true.

For the second inequality:

=>11 > -2

Add 3 to both sides, then add 3, then add (-4)

=> 11 +3 + 3 + (-4) > -2 + 3+3 + (-4)

=> 13 > 0

there is no change in the inequality sign and it is still true.

For the third inequality:

=> -2 ≤ -2

Subtract 6 from both sides, then 8, and then 2

=> -2 -6 -8 -2 ≤  -2 -6 -8 -2

=>  -18 ≤ -18

there is no change in the inequality sign and it is still true.

For the fourth inequality:

=> -4 < 8

Divide both sides by -4

=> -4 / -4 < 8 / -4

Since, after dividing or multiplying on both sides by a negative sign, inequality changes its sign

=> 1 > -2

Divide both sides by -2

=> -1/2 < 1

there are two times a change in the inequality sign and it is still true.

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Answer:

26%

Step-by-step explanation:

I did some simple math here: a percentage represents a number over 100.

To find the percentage, I just divided 78 by 300 and got 0.26

I then multiplied by 100 to get 26%

Hope this helps! Have a great day!

Answer:

B. 3x+5y=11

   4x+2y=10

On Edge 2022

Hope this Helps :)

A system of equation is the set of equation in which the finite set of equation is present for which the common solution is sought.

The system of equations can be used to find the prices of the blue and green marbles are,

\(3x+5y=11\)

\(4x+2y=10\)

Thus the option 2 is the correct option.

What is system of equation?

A system of equation is the set of equation in which the finite set of equation is present for which the common solution is sought.

Given information-

Johann bought 3 blue marbles and 5 green marbles.

The total money paid by the Johann is $11.

Marta bought 4 blue marbles and 2 green marbles.

The total money paid by the Marta is $10.

Suppose the price of the blue marbles is \(x\) and price of the green marbles is \(y\).

As Johann bought 3 blue marbles and 5 green marbles and paid $11. Thus,

\(3x+5y=11\)      .....1

Let the above equation is equation number 1.

As Marta bought 4 blue marbles and 2 green marbles and paid $10. Thus,

\(4x+2y=10\)      .....2

Let the above equation is equation number 2.

Thus the equation 1 and 2 are the required set of the equation for the given problem.

Hence the system of equations can be used to find the prices of the blue and green marbles are,

\(3x+5y=11\)

\(4x+2y=10\)

Thus the option 2 is the correct option.

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The input value other than 0 for f(x)=-2 would be equal to x = -3

Function is a type of relation, or rule, that maps one input to specific single output. Functions which are formed by composing two or more functions in a way that one's output is another's input are called composite functions. They are also called function of functions.

We are given the function as f(x) = -2

We wants to know what x values causes the y value to be -2

Since there are two x values when y = -2

x=-3 and x = 0

Therefore, we need a value other than x=0,

Thus x = -3

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We can use the fact that the sum of all angles in a triangle is 180° to find the missing angles in both triangles.Therefore, the missing angles in ΔABC are ∠E = 47° and ∠F = 76°, and in ΔDEF is ∠D = 93°.

A geometric figure formed by two rays that share a common endpoint is termed as an angle. It is measured in degrees or radians and has different types based on its measure.

In ΔABC, we know that ∠A = 57° and that the other two angles are ∠E and ∠F. Therefore, we have:

∠A + ∠E + ∠F = 180°

57° + ∠E + ∠F = 180°

∠E + ∠F = 180° - 57°

∠E + ∠F = 123°

In triangle ΔDEF, we know that one angle is 40° and the other angle is ∠D. Therefore, we have:

∠D + 40° + ∠E = 180°

∠D + ∠E = 180° - 40°

∠D + ∠E = 140°

We now have two equations with two unknowns (∠E + ∠F = 123° and ∠D + ∠E = 140°). Solving the system of equations simultaneously gives us:

∠E = 47°

∠F = 76°

∠D = 93°

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Answer:

Option A is the correct answer

The initial age of 10 years and the spaceship speed of 0.60•c, gives the Andrea's age at the end of the trip as 18 years.

The time dilation using the Lorentz transformation formula is presented as follows;

\(t' = \frac{t}{ \sqrt{1 - \frac{ {v}^{2} }{ {c}^{2} } } } \)

From the question, we have;

The spaceship's speed, v = 0.6•c

∆t = Rest frame, Courtney's time, change = 10 years

Therefore;

\(\delta t' =\delta t \times \sqrt{1 - \frac{ {(0.6 \cdot c)}^{2} }{ {c}^{2} } } = 8\)

The time that elapses as measured by Andrea = 8 years

Andrea's age, A, at the end of the trip is therefore;

A = 10 years + 8 years = 18 years

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Answer:

irrational,  it can't be written as a fraction

Step-by-step explanation:

The length of segment LK in the triangle is 15.75.

option D.

The length of segment LK in the triangle is calculated by applying the principle of median lengths of triangle as shown below.

From the diagram, we can see that;

length KX and XL are not in the same proportion

length KX and XL divides length LK into two parts on the ratio of 1 : 2

Using the principle of proportion, can set up the following equation and calculate the value of length LK as follows;

total ratio = 1 + 2 = 3

(proportion of length LX / total ratio ) x length LK = 10.5

( 2 / 3 ) x LK = 10.5

2LK = 3(10.5)

2LK = 31.5

LK = 31.5 / 2

LK = 15.75

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Answer:

\(\huge\boxed{\sf x = 3 }\)

Step-by-step explanation:

Given that

f(x) = 4x + 5

Put f(x) = 17

17 = 4x + 5

Subtract 5 to both sides

17 - 5 = 4x

12 = 4x

Divide 4 to both sides

12 / 4 = x

3 = x

OR

x = 3

\(\rule[225]{225}{2}\)

Hope this helped!

If a mathematical society in India designed a stamp. The  area of the design on the stamp is:  1018.08mm².

First step is to find the shorter leg

CD =DB√3

DB =CD/√3

DB= 42/√3

DB = 24.24mm

Second step is to find the hypotenuse

DB = BC/2

BC =2 × DB

BC = 2× 24.24 mm

BC =48.48 mm

Now let find the area

Area = 1/2 AB × CD

Area = 1/2× BC ×CD

Area = 1/2 × 48.48mm × 42

Area = 1018.08mm²

Therefore the  area of the design on the stamp is:  1018.08mm².

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3x2 - 13x - 10

multiplying the first and third terms we have

-30x2

The factors of -30 that will be added to get - 13 are -15 and 2

so we split the expression further

= 3x2 - 15x + 2x - 10

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

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

Answer:yes

Step-by-step explanation:0 and 0 means that those numbers dont move that distance apart 1 that 1 X 1 it seems so it would equal 1 2 and 4 2 x 2 = 4 and 3 X 3 equals 9

Answer:

30 degrees

Step-by-step explanation:

I think that every corner is a 90 degree angle so 90/2 is 30

Therefore, the polynomial has two terms which are not like terms because they have different variable powers.

The two terms are 3j4k and -2jk3. This is because a polynomial is an expression with one or more terms consisting of constants and variables raised to non-negative integer exponents, combined through addition, subtraction, multiplication, and division.In this polynomial, j and k are variables. They are raised to the fourth and first power, respectively, in the first term, and to the first and third power, respectively, in the second term. Therefore, the polynomial has two terms which are not like terms because they have different variable powers.

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Answer:

The cost of the dress is $240.

Step-by-step explanation:

With the information provided, you can use a rule of three to find the total cost of the dress as you know that $60 represents 1/4 of the total cost of the dress:

60 → 1/4

 x ←   1

x=(60*1)/(1/4)

x=(60)/(1/4)

x=(60*4)/(1)

x=240/1

x=240

According to this, the answer is that the cost of the dress is $240.

Step-by-step explanation:

area of a triangle=1/2×b×h

∆=1/2×9.2×12.2

∆=56.12 km

In mathematics, the place value chart is a tool that helps students understand the value of digits in a number. It is a visual representation of how digits are grouped and arranged to represent numbers. The place value chart is arranged in columns, with each column representing a different place value.

The place value chart starts with the ones place, also called units place. This is the rightmost column and it represents the ones digit in a number. The next column is the tens place, which represents the tens digit in a number. The hundredth place represents the hundreds digit and so on. Each column is ten times larger than the previous one.

A place value chart can be used to understand the value of a digit in a number.

Place value chart also helps to understand decimal numbers, which are numbers that have a decimal point. The decimal point separates the whole numbers from the fractional numbers. Each place to the right of the decimal point represents a smaller value.

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Today is Saturday, because tomorrow will be Sunday and the day after will be Monday two days after will be the day before Thursday, Wednesday

We have,

The day after tomorrow is two days before Thursday.

Since, tomorrow will be Sunday and the day after will be Monday two days after will be the day before Thursday, Wednesday.

Hence, Today is Saturday.

Therefore, Today is Saturday, because tomorrow will be Sunday and the day after will be Monday two days after will be the day before Thursday, Wednesday.

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