CAN someone help me about this?

inverse of function

-

f (x) = 7(x - 5) + 1

y = 7x - 34

x = (y + 34) / 7

g (x) = (x + 34) / 7

____

The correct description will be;

⇒ y = - 2x + 3

4x + 2y = 6

These are independent.

⇒ y = -2x + 3

4x + y = 9

These are consistent.

⇒ y = -2x+3

4x + 2y = 9

These are inconsistent.

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

The expressions are,

1. y = -2x+3

4x + 2y = 6

2. y = -2x+3

4x+y=9

3. y = -2x+3

4x + 2y = 9

Now,

From (1);

1. y = -2x+3

4x + 2y = 6

⇒ 2x + y = 3

4x + 2y = 6

⇒ 2x + y = 3

So We get;

⇒ 2/2 = 1/1 = 3/3

⇒ 1/1 = 1/1 = 1/1

These are independent.

From (2);

1. y = -2x+3

4x + y = 9

⇒ 2x + y = 3

4x + y = 9

So We get;

⇒ 2/4 ≠ 1/1

⇒ 1/2 ≠ 1/1

These are consistent.

From (3);

1. y = -2x+3

4x + 2y = 9

⇒ 2x + y = 3

4x + 2y = 9

So We get;

⇒ 2/4 = 1/2 = 3/9

⇒ 1/2 = 1/2 ≠ 1/3

These are inconsistent.

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If points d and f are on side ab and points e and g are on side ac then line segments de and fg are parallel

What are parallel lines?

Parallel lines are those lines that do not meet at any point. If we draw a triangle ABC and plot points d and f are marked on side ab and points e and g are marked on side ac then the line segment fg is parallel to de because both the line segments are drawn from the points which are on the sides opposite to each other. We have assumed a simple triangle because no description is given for the triangle

Hence the line segment fg is parallel to de if drawn points d and f marked on ab and points e and g are marked on ac.

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Step-by-step explanation:

S=6a^2

294=6a^2

294/6=a^2

a^2=49

a=

[tex] \sqrt{49} [/tex]

a=7

V=a^3

V=7^3

V=343cm3

The ratio of boy to girl who play kickball at race is 6 to 2. There are 18 girl on the team. the number of boys who play kickball at race is 12 boys.

The ratio of boy to girl who play kickball at race is 6 to 2

6 boys: 2 girls

Multiply the number of girls by the ratio:

18 girls x (6 boys / 2 girls) = 18 x 3 = 54

Subtract the number of girls from the total to get the number of boys:

54 - 18 = 36

Therefore, there are 12 boys who play kickball at race.

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The value of x in the triangle is 140 degrees.

The exterior angle theorem states that the measure of an exterior angle is equal to the sum of the measures of the two remote interior angles of the triangle.

An exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Applying the exterior angle theorem,

40 + 100 = x

140 = x

x = 140 degrees.

Therefore, x is 140 degrees.

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Answer:

To find the value of r₂, we need to know how the dilations with scale factors r₁ and r₂ affect the coordinates of the point P.

If a dilation with scale factor r₁ maps a point P with coordinates (x, y) to another point P' with coordinates (x', y'), then the coordinates of P' are related to the coordinates of P by the equation:

x' = r₁x

y' = r₁y

Similarly, if a dilation with scale factor r₂ maps a point P' with coordinates (x', y') to another point P'' with coordinates (x'', y''), then the coordinates of P'' are related to the coordinates of P' by the equation:

x'' = r₂x'

y'' = r₂y'

Since we are given that the dilations map P to P and P' to P, we can set the coordinates of P and P'' equal to each other, and the coordinates of P' and P'' equal to each other. This gives us the following system of equations:

x'' = x

y'' = y

x'' = r₂x'

y'' = r₂y'

Substituting the second set of equations into the first set, we get:

x = r₂x'

y = r₂y'

Since we know that the dilation with scale factor r₁ maps P to P', we can substitute the equations for x' and y' into the above equations to get:

x = r₂*(r₁x)

y = r₂(r₁*y)

Solving for r₂, we find that:

r₂ = 1/r₁

Substituting the value of r₁ = 1/4, we find that:

r₂ = 1/(1/4) = 4

So the value of r₂ is 4.

the edges of a cube increase at a rate of 5 centimeters per second. The surface area is changing at a rate of 150 cm²/sec.

To calculate the rate at which the surface area of a cube is changing when each edge is 10 cm long, we first need to calculate the surface area of the cube. The surface area of a cube can be calculated by multiplying the length of one edge cubed by 6. In this case, the length of one edge is 10 cm, so the surface area of the cube is 600 cm². Since the edges of the cube are increasing at a rate of 5 cm/sec, the rate at which the surface area of the cube is changing is equal to the surface area multiplied by the rate of increase, or 600 cm² * 5 cm/sec = 300 cm²/sec.

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To identify the congruence postulate used, you need to analyze the given information about the sides and angles of the triangles and choose the postulate that matches the given information.

It's good to use different congruence postulates to identify the congruence of triangles. To identify the congruence postulate used, you need to analyze the given information about the sides and angles of the triangles and see which postulate matches the given information.

For example, if you are given the lengths of two sides and the included angle of one triangle, and the lengths of the corresponding sides and included angle of the other triangle, you can use the SAS Congruence Theorem to conclude that the triangles are congruent. If you are given the lengths of all three sides of both triangles, you can use the SSS Congruence Theorem to conclude that the triangles are congruent.

It's also important to note that the AAS Congruence Theorem is not a valid postulate. The correct postulate is the ASA (Angle-Side-Angle) Congruence Theorem, which states that if two angles of one triangle are congruent to two angles of another triangle, and the included sides are congruent, then the triangles are congruent.

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Step-by-step explanation:

add 100degrees to 15 degrees to get 115degrees. Subtract 180 degrees to 115degrees to get the missing angle which will be 65 degrees

Each color pencil in the first case costs $0.12. Each color pencil in the second case costs $0.11. The cheapest pencil is in the second case.

The unitary method is a technique that involves determining the value of a single unit and then calculating the value of the requisite number of units based on that value. The unitary method's formula is to get the value of a single unit and then multiply that value by the number of units to achieve the required value.

Here,

Cost of 24 color pencil=$2.88

Cost of 1 color pencil=$2.88/24

=$0.12

Cost of 18 color pencil=$1.98

Cost of 1 color pencil=$1.98/18

=$0.11

The cost of each color pencil from first case is $0.12. The cost of each color pencil from second case is $0.11. The second case has cheapest pencil.

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Answer:

y=16-3x

Step-by-step explanation:

change in x /change in y

The principal and coupon payment made on January 15, 2020 would be calculated based on the difference between the CPI on the date of issue and the CPI on due time January 15, 2020.

Using the values given, the principal and coupon payment would be equal to the original principal and coupon multiplied by the ratio of the two CPI values. Therefore, the principal and coupon payment would be equal to (CPI on date of issue/CPI on January 15, 2020) * (original principal + coupon).

1. Calculate the ratio of the two CPI values by dividing the CPI on the date of issue by the CPI on January 15, 2020 with time:

ratio = (CPI on date of issue / CPI on January 15, 2020)

2. Multiply the original principal and coupon by the ratio from step 1:

principal and coupon payment = (ratio) * (original principal + coupon)

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To make a 30% alcohol solution, you would need to add 20 liters of 20% alcohol solution to 40 liters of 50% percentage alcohol solution.

50 liters of 50% alcohol solution = 50 liters x 0.50 = 25 liters of pure alcohol

40 liters of 50% alcohol solution = 40 liters x 0.50 = 20 liters of pure alcohol

Total pure alcohol = 25 liters + 20 liters = 45 liters

Required pure alcohol to make a 30% solution = 30 liters

Difference in pure alcohol = 30 liters - 45 liters = -15 liters

Add 20% alcohol solution to make up the difference = -15 liters/0.20 = 75 liters of 20% alcohol solution.

Therefore, 75 liters of 20% alcohol solution should be added to 40 liters of a 50% alcohol solution to make a 30% percentage solution.

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A type II error is when you fail to reject a false null hypothesis. This means that you conclude that the null hypothesis is true, even though it is actually false. This error occurs when you do not have sufficient evidence to reject the null hypothesis, and you end up accepting it as true.

Here are the possible options for type II errors:

1.Failing to reject a false null hypothesis (correct answer).

2.Accepting a false alternate hypothesis.

3.Rejecting a false null hypothesis.

4.Rejecting a false alternate hypothesis.

A hypothesis is a tested assertion about the relationship between two or more variables or a theory put up to explain an observed occurrence in a scientific environment.

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probability that exactly 5  customers pay in cash  is 0.178863

Total number of customer = 20

probability of payment in cash = 0.3

probability of payments via other methods  = 1 - 0.3 =0.7

let probability of payment in cash be p

and probability of payments via other methods be q

To find the probability that exactly y customers pay in cash

p [ x = y ] =  [tex]n_c__x p^x q ^(n-x)[/tex]

here value of y= 5 and n=20 , p =0.3 , q= 0.7

putting the values in above equations we get:

p [ x =5 ] = [tex]20_c__5 * 0.3 ^5 * 0.7 ^15[/tex]

p [ x =5 ] = (15504) * (0.00243) * (0.0047475615)

p [ x =5 ] = 0.178863

so the probability that exactly 5  customers pay in cash  is 0.178863

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Answer:

Step-by-step explanation:

Plutonium is a radioactive element that is known to release large amounts of energy through the process of nuclear fission. When a nucleus of plutonium atom is split, it releases a tremendous amount of energy in the form of heat, light, and radiation. This energy is released through a chain reaction, in which the energy from one fission event is used to trigger the fission of additional atoms, releasing even more energy. The heat energy produced by plutonium can be harnessed and used in various ways, such as generating electricity or powering spacecraft.

It is important to note that the behavior of plutonium depicted in the movie "Martian" may be based on scientific concepts, but it may also include fictional elements and may not be entirely accurate or realistic. It is important to remember that fictional works are not necessarily scientifically accurate and should not be taken as fact.

The plutonium emit neutrons as a few of its nuclei spontaneously undergo nuclear fission, which is the reason behind the heat generation.

Given is a dug out plutonium.

Plutonium - 238, Pu - 240 and Pu - 242 emit neutrons as a few of their nuclei spontaneously undergo nuclear fission, albeit at a low rate. This is the reason why plutonium acts as a source of heat energy for Matt Damon and helped him save the fuel.

Therefore, the plutonium emit neutrons as a few of its nuclei spontaneously undergo nuclear fission, which is the reason behind the heat generation.

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1/2 is the scale factor from the cliff in the drawing to the actual cliff.

A scale factor is the ratio between corresponding measurements of an object and a representation of that object. If the scale factor is a whole number, the copy will be larger. If the scale factor is a fraction, the copy will be smaller. The scale factor is 2 because the length of each of the sides has been multiplied by 2. If this is reversed: The scale factor is 1/2 because the length of each of the sides has been divided by 2.

A scale factor of 1/2 means that the new shape is half the size of the original shape.

Scale factor = Larger figure dimensions ÷ Smaller figure dimensions

The scale factor for scaling up is always greater than 1. Scaling down means that a larger figure is reduced to a smaller one. The scale factor of a dilated figure is denoted by 'r' or 'k'.

If the scale factor is more than 1, the image is enlarged.

If the scale factor is less than 1, the image is contracted.

If the scale factor is 1 (k = 1), the image remains the same.

The scale factor cannot be zero.

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Answer:

To solve this equation, we need to perform the operations in the correct order according to the order of operations. The order of operations is a set of rules for determining the sequence in which operations should be performed in a mathematical expression to get the correct result. The order of operations is typically abbreviated as PEMDAS, which stands for Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).

Applying the order of operations to the given equation, we first need to evaluate the expression inside the parentheses, which is 3(x - 6). To do this, we need to subtract 6 from x, which gives us 3(x - 6) = 3(11 - 6) = 3(5) = 15. Next, we need to multiply the result of this operation by 3, which gives us 3 * 15 = 45. Therefore, the final result of the equation is 45.

Here is how you can solve the equation step by step:

1. Evaluate the expression inside the parentheses: 3(x - 6) = 3(11 - 6) = 3(5) = 15

2. Multiply the result of the previous step by 3: 3 * 15 = 45

Therefore, the final result of the equation is 45.

Step-by-step explanation:

Answer:

2662

Step-by-step explanation:

it is really good to this 2.66÷2 X 100

Answer:

  45 units

Step-by-step explanation:

Given that the perimeter and diagonal length of a polygon are proportional and that a polygon with a diagonal of 8 units has a perimeter of 36 units, you want the perimeter for a diagonal of 10 units.

The proportion of interest is ...

  P/d = p/10 = 36/8

Multiplying by 10 gives ...

  p = 10(36/8) = 45

The perimeter of the larger polygon is 45 units.

Ana should choose option (a) because she pays the least in interest.

To determine which option would be the most cost-effective for Ana, you need to consider the total amount of interest she would pay over the course of the loan.

Option (a) is monthly simple interest, which means that the interest is calculated on the principal balance of the loan at the end of each month, based on the annual interest rate. Option (b) is quarterly compound interest, which means that the interest is compounded and added to the principal balance of the loan at the end of each quarter. Option (c) is continuous compound interest, which means that the interest is compounded continuously, rather than at fixed intervals.

Using the formula for simple interest, the total amount of interest that Ana would pay over the course of the loan under option (a) is:

$166.25 = $5,000 * 3.99% * 10

Answer:

B

Step-by-step explanation:

On a coordinate plane, parallel lines have the same slope as geometric figures are true. Thus option B is correct.

Marks, splines, spheres, and curved are used to build enclosed geometric shapes. We can see these shapes all around us. Illustrations of geometric shapes include circles, rectangles, triangles, and others. Any configuration of points, columns, or angles is a geometry figure.

A point is the most fundamental algebraic concept because it has no boundaries. Simply put, a point upon that plane is a location. A dot is used to symbolize it. A plane can be identified by three non-straight-line points.

As two or much more vectors seldom cross each other and are located on the same dimension, these are said to be parallel. The slope of these lines is constant. Coplanar lines that seem to be parallel are the ones that don't cross. Therefore, option B is the correct option.

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Answer:

2.8mm

Step-by-step explanation:

using the sine rule.

Answer:

20

Step-by-step explanation:

When you have two minuses, it will result in a plus.

Answer:

it's 20

Step-by-step explanation:

i just hv to know the sign

Answer:

Described below.

Step-by-step explanation:

To graph the solution to an inequality on the number line, we need to determine the values of the variable that satisfy the inequality and then plot those values on the number line. In the given inequality, 35z > 34, we can solve for z by dividing both sides of the inequality by 35 to get:

z > 34/35

This gives us the solution z > 0.96857. To graph this solution on the number line, we can plot a dot at the value 0.96857, which represents the smallest value of z that satisfies the inequality. We can then draw a line segment to the right of this point, indicating that all values of z greater than 0.96857 are also solutions of the inequality. This is shown in the following diagram:

[Insert diagram of number line with dot at 0.96857 and line segment to the right]

As the inequality is strict (i.e., it uses the ">" symbol rather than "≥"), the values of z that exactly equal 0.96857 are not considered to be solutions. Only values of z that are greater than 0.96857 are considered to be solutions of the inequality.

Answer:

answer in the picture... .

64grams of bismuth-214 must be prepared if the shipping time is 120minutes.

What is half cycle?

Time required for a quantity to reduce to half of its initial value is termed as half life. It can help us to know how quickly unstable atoms undergo radioactive decay. This is used generally to characterize any type of exponential decay. It occurs when unstable atomic particles lose energy. Twenty-nine elements are capable of this process.

Rutherford applied the principle of a radioactive element's half-life in the age determination of rocks by calculating the decay period of radium to lead-206.

Given half life of 20min of 1g of Bismuth-214

If the shipping time is 120minutes, then

10min/20min/half life

=6 half life

=1/2^6=1/64

Grams of bismuth-214 that can be prepared in 120 min,

=1gm*64

=64grams.

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Electric company charges 7.50 dollars for the first 50 kWh, 10 dollars for the next 50 kWh, 13.50 for the next 100 kWh, 18.50 for the next 100 kWh, 20 dollars for the next 100 kWh and 25 dollars for any kWh over 400.

Electric companies charge customers for the amount of energy they consume, measured in kilowatt-hours (kWh). The cost for each kWh can vary depending on the amount of energy consumed. An electric company may charge 7.50 dollars for the first 50 kWh, 10 dollars for the next 50 kWh, 13.50 for the next 100 kWh, 18.50 for the next 100 kWh, 20 dollars for the next 100 kWh and 25 dollars for any kWh over 400. The higher rate for higher usage reflects the fact that larger consumers of electricity tend to drive up the cost of production and distribution for the company. In addition, electric companies may offer discounts to customers who use more than a certain amount of electricity each month, encouraging conservation and helping to reduce costs.

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Complete Question  is

Economic The table how cot in dollar charged by an electric company for

variou amount of energy in kilowatt-hour

Kilowatt-Hour  Cost in Dollars

0-50 .            7.50

50-100.          10.00

100-200.      13.50

200-300.       18.50

300-400.       20.00

400+.                25.00