please help me on this will give you brainliest

The Correct answer is option a. 7-9.42, P-value = 0.002 which is derived based on the given data about alcohol consumption.

The chi-square test of homogeneity is a statistical test used to determine whether there is a significant difference between the observed frequencies of two categorical variables.

In this case, the test statistic would be the chi-square value calculated using the observed frequencies of alcohol consumption in the sample of smokers and non-smokers, and the P-value would be the probability of obtaining a chi-square value as extreme or more extreme than the calculated value under the assumption that the null hypothesis is true (i.e. no difference in alcohol consumption between smokers and non-smokers).

In this case, the test statistic would be 7.942 and the P-value would be 0.002 which implies that there is a significant difference in alcohol consumption between smokers and non-smokers.

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The new coordinates of the point in the transformed shape would be (-1/2x, -1/2y).

A point is transformed when it is moved from where it was originally to a new location. Translation, rotation, reflection, and dilation are examples of different transformations.

A scale factor of -1/2 around the center point (0,0) would reflect the shape across the origin and also shrink it by a factor of 1/2.

The transformation can be represented by the matrix:

[-1/2 0]

[ 0 -1/2]

This matrix would be applied to the coordinates of each point in the shape to obtain the new coordinates of the transformed shape.

So, if a point in the shape had coordinates (x, y), the new coordinates of the point in the transformed shape would be (-1/2x, -1/2y).

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The question seems to be incomplete the correct question would be:

Enlarge shape q by a scale factor of -1/2 around the center point (0,0). if a point in the shape had coordinates (x, y), what are the new coordinates?

Answer:

3 small postcards; 4 large postcards

I know this. Hope it helps :)

Answer:

4 large post cards and 3 small ones

The number of cubic yards of each component needed are 3.99 cubic yards of cement, 7.97 cubic yards of sand  and 15.94 cubic yards of gravel

Ratio is used to compare two or more quantities. It is used to indicate how big or small a quantity is when compared to another

Since a total of 18.6 cu yd of concrete is required and the total amount of these components must be 1½ times the volume of concrete needed. We can say:

total amount of these components = 1½ × 18.6 cu yd = 27.9 cu yd

Also, since the ratio of cement to sand to gravel for this application is 1:2:4. We have:

Total share = 1 + 2 + 4 = 7

cement = 1/7  × 27.9 =  3.99 cubic yards

sand  = 2/7  × 27.9 =  7.97 cubic yards

gravel = 4/7  × 27.9 =  15.94 cubic yards

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Answer:

DC = 99

Step-by-step explanation:

BD perpendicular AC

AD/BD = BD/DC

=> DC =DB^2/AD

         =33^2/11=99

{calculate}

if pp is sufficient for q  is not equivalent to P <-> q for p and q conditional statement

The true statements for the conditional statement p → q are;

If p then q

p, therefore q

q, if p

p is enough condition for q

Reason for the above selection

The conditional statement p → q is read as If p then q

The deductive validity of the conditional statement is; p, therefore q

The conditional statemen, p → q also means;

1) q, if p

2) q, provided p

3) p, only of q

4) p implies q

5) q whenever, p

6) p is enough condition for q

7) q is a necessary condition for p

Therefore, the correct statements are;

If p then q

p, therefore q

q, if p

p is enough condition for q

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Answer:A,D,E,F

Step-by-step explanation:A(x) = x4 - 2x³ - 21x² +22x + 40= A,D,E,F

The linear equation [ ( 2x PLUS y ) EQUALS 10 ] has only one solution.

A linear equation is an algebraic equation having the form y=mx+b, involving only a constant and a first-order (linear) term, where b is the y-intercept and m is the slope. Occasionally, the above is called a 'linear equation of two variables,' where x and y are the variables.

Now solve the given linear equation which is:

[ ( 2x + y ) = 10  ]

Now solve this equation in order to determine the number of solutions it has,

( 2x + y ) = 10

( 2x + (10 - 2x)) = 10

( 2x + 10 - 2x) = 10

( 2x + 10 - 2x) = 10

(10) = (10)

Since 10 = 10 is correct, therefore, the equation  ( 2x + y ) = 10 has only one solution.

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In mathematics, an algebraic expression is an assertion built up from integer constants, variables, and algebraic operations. This article is all about to Monomials, Binomials, and Polynomials.

1. Monomial

An algebraic expression that carries only one non-zero term is known as a monomial. A monomial is a just like a type of polynomial, like, binomial and trinomial, which is an algebraic expression having only a one single term, which is a non-zero.

It comprises of only a single term which makes it easy to do the operation of addition, subtraction, and multiplication.

2. Binomial

An algebraic expression that comprises of two non-zero terms is known as a binomial. It is expressed in the form equation ax ^m + bx ^n where a and b number, x is variable, m and n are nonnegative distinct integers.

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Answer:

Step-by-step explanation:

show picture

Answer:

1,107 is your answer

Step-by-step explanation:

The probability that this dancer raised less than £10 is; 19/30

Probability is defined as the number of successful outcomes divided by the total number of outcomes. Thus;

Probability = number of successful outcomes/total number of outcomes

From the attached table, we see that;

£4.99 of less: Number of dancers are 15

£5 to £9.99: Number of dancers are 23

£10 to £14.99: Number of dancers are 12

£15 to £19.99: Number of dancers are 7

£20 to £24.99: Number of dancers are 3

Thus, we see that the total number of dancers = 15 + 23 + 12 + 7 + 3 = 60 dancers.

If a dancer is chosen at random, the probability that the dancer raised less than £10 = (23 + 15)/60 = 38/60 = 19/30

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Complete question is;

A group of dancers raised some money for a charity here is some information about the money raised

One of the dancers is chosen at random to give the money raised to the charity

What is the probability that this dancer raised less then £10

Answer:

Step-by-step explanation:

In conclusion, it can be argued that Abby Sunderland was too young to sail solo. Despite her ambitious and determined nature, her lack of experience and maturity put her at a significant risk during her solo sailing journey. The fact that she had to be rescued twice during her attempt highlights the dangers of attempting such a feat at such a young age. While it is admirable to have the courage to pursue one's dreams, it is important to consider the potential consequences and weigh them against the potential benefits. In this case, it can be argued that the risks far outweighed the potential rewards.

The distance between the line and the point is 8 units.

When two parallel lines intersect, a two-dimensional coordinate plane called the cartesian plane is created. The horizontal line is the X-axis, while the vertical line is the Y-axis. If the sign of x is positive, the coordinate point (x, y) in the Cartesian plane indicates that the point is on the right of the origin; otherwise, it indicates that the position is on the left of the origin.

Given a line L,

and the equation of a line is y = 1

actual equation of line is ax + by +c = 0

equation of line is 0x + y - 1 = 0

here a = 0, b = 1 and c = -1

and point T(-1, -7)

distance between line and the point is d = [tex]\frac{|ax_1 + by_1 + c|}{\sqrt{a^2 + b^2} }[/tex]

x₁ = -1, y₁ = -7

|ax₁ + by₁ + c| = |0(-1) + 1(-7)  +(-1)|

|ax₁ + by₁ + c| = 8

√(a² + b²) = √(0² + (1)²) = 1

distance between line and the point is d = 8/1 = 8 units

Hence the distance is 8 units.

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Let angle D be an acute angle such that  D=0. 33. The measure of angle D is 70.7 degree.

Acute Angle:

An angle is formed when two rays meet at a vertex. If this angle is less than 90°, it is called an acute angle. In the image below, the angle formed between "Ray 1" and "Ray 2" is acute. Bisecting a right angle also creates two acute angles.

Inverse Cosine :

Inverse cosine is the important inverse trigonometric function. Mathematically, it is written cos-1(x) and is the inverse of the trigonometric cosine cos(x). Note that arc cosine is not the reciprocal of cos x. There are six inverse trigonometric functions like sin-1x, cos-1x, tan-1x, csc-1x, sec-1x, cot-1x. The arc cosine is used to determine angular measurements from the trigonometric ratio cos x values.

According to the question:

To approximate the measure of angle D, we will need to use the inverse cosine function on our calculator. All calculators vary, so I am not sure where you would find the button for it on your calculator. However, I know many calculators have it so you click the second button, then cos

 cos(D) = 0.33

⇒ D = cos^-1 (0.33)

⇒ D = 70.7 degrees

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Answer:

-4x

Step-by-step explanation:

3-7=-4 just add a x

The equation of the perpendicular line is y = -7/2(x + 5) + 2

From the question, we have the following parameters that can be used in our computation:

y=2/7x-8

Also, from the question;

We have the following points

Point = (-4, 2) i.e.  (x, y) = (-4, 2)

The equation of a line can be represented as

y = mx + c

Where

Slope = m

By comparing the equations, we have the following

m = 2/7

This means that the slope is 2/7

The slopes of perpendicular lines are opposite reciprocals

This means that the slope of the other line is -7/2

The equation of the line is then calculated as

y = m(x - x₁) +y₁

Where

m = -7/2

(x₁, y₁) = (-4, 2)

So, we have

y = -7/2(x + 5) + 2

Hence, the line has an equation of y = -7/2(x + 5) + 2

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Answer: 21d^7

Step-by-step explanation:(7x3) x d^(5+2)
= 21 d^7

Answer:

(7d^5)(3d^2)

7*3 = 21

5+2 = 7

21d^7

The maximum price per egg that the supermarket may charge is $0.245 per egg, which is the difference between the pricing per egg for the 2 distinct cartons.

The answer to the query is

The following details are available to us:

We'll first calculate the cost per egg for each of the two different-sized cartons in order to determine the cost per egg that lies between the two costs.

We are aware that the cost of one product is determined by dividing the total cost by the quantity of products.

The price of an egg between 0.24 as well as 0.25 must now be determined.

Note that there is a 0.01 difference between the two fees.

To precisely determine the middle charge, we will split it by two:

0.01/2 = 0.005

This can be added to $0.24 or subtracted from $0.25.

$0.24 + $0.005 = $0.245

So, $0.245 is the maximum price the supermarket can charge per egg.

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The complete question is-

A carton of 12 eggs costs $3.00. A carton of 18 eggs costs $4.32. Suppose a supermarket wants to sell the eggs individually. Is there a price the supermarket can charge per egg that is between the prices per egg for the two different-sized cartons? Explain

Answer: -21x-8

Step-by-step explanation:

Combine the like terms

Answer:

i need more information to answer your question

Step-by-step explanation:

Rose gets 12 refills by a coffee shop.

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

Given that;

A coffee shop sells a mug for $8.95. Each refill costs $1.50.

And, Last month Rose spent $26.75 on a mug and refills.

Let number of refills she get = x

So, We can formulate;

⇒ $8.95 + $1.50x = $26.75

⇒ 8.95 + 1.50x = 26.75

⇒ 1.50x = 26.75 - 8.95

⇒ 1.50x = 17.80

⇒ x = 17.8 / 1.5

⇒ x = 12

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Answer:

50 km : 12 km

Step-by-step explanation:

600 km : 12 km

=50 km : 1 km.

To multiply two mixed numbers, you can convert them to improper fractions and then multiply the numerators and denominators separately.

2 1/5 can be written as (2 x 5 + 1) / 5 = 11/5

2 2/3 can be written as (2 x 3 + 2) / 3 = 8/3

So the product of 2 1/5 x 2 2/3 is (11/5) * (8/3) = 88/15 which is equivalent to 5 8/15 or 5.533 repeating (if you want to express it as decimal)

You can simplify 88/15 by dividing both numerator and denominator by the greatest common divisor (GCD) which is 1 in this case, so the final result is 88/15.

Answer:

Step-by-step explanation:

I will assume you want the y-axis intercepts

arrange each equation into the form  y = mx + b  <==b  is  y-axis intercept

2x+y =1

y = -2x+1    <====  y axis intercept = 1

x -2y = 8

2y = x-8

y = 1/2x -4       <====  - 4 is the y axis intercept

Another way to find the y-axis intercept is to realize this occurs when x = 0

  put x = 0 into the equations to find the intercept value

2x+y =1

2(0) + y = 1

y =1    <=====intercept

x-2y = 8

0 - 2y = 8

y = -4   <=====intercept

To find the where the two lines intersect, equate them

-2x+1 = 1/2x-4

5 = 2.5x

x = 2    then y = -2x+1 = -3      point of intersection (2,-3)

Dilating a shape with a scale factor is a process of enlarging or shrinking a shape.

Scale factor the research between two corresponding length area of the volumes of two similar figure it is used to compare the size of one figure to another as well as the enlarge of reduced to size of a figure the scale factor is expressed as the ratio searches one it's to one.

It can be done using a compass or a ruler. First, measure the length of the side of the shape and calculate the scale factor. Then, use the compass or ruler to draw a line that is the length of the side multiplied by the scale factor. Finally, join the new line with the other side of the shape to complete the dilation.

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Answer:

A and B

Step-by-step explanation:

theres one input for each ouput

To  find the center of dilation,We'll fix our compass to a distance that is closer to the overall distance but still greater than halfway between vertex L and point C. Start with the compass's point on vertex L while maintaining the same distance, and then draw a curve that intersects the line connecting L and C.

Centre of dilation  of an image in mathematics refers to a change that results in an image with the same shape but a different size, either larger or smaller. A dilation can only be built with two bits of information.

An operation that moves, flips, or otherwise alters a figure to produce a new figure is called a transformation. Rigid transformations maintain size, whereas non-rigid transformations do not. A dilatation enlarges or reduces a figure while maintaining its original shape. To put it another way, the dilatation resembles the original. Every dilatation has a scale factor and a centre. The scale factor indicates how much the figure stretches or contracts, and the centre serves as the point of reference for the dilation (much like the vanishing point in a perspective drawing). A scale factor is usually identified by a label and is never zero. Additionally, the dilatation would be if the original figure were labelled, for example.

The point from which the image is dilated is known as the centre of dilatation (or point of dilation).

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The points  (4.5,1.5), (0.5, – 1.5), and (1.5, – 2.5) have been graphed on the coordinate plane (Refer to the graph attached below.)

The Cartesian coordinate system on a plane is a system of coordinates that uniquely identifies each point by a pair of numerical coordinates.

These numerical coordinates are the signed distances from two fixed perpendicular oriented lines to the point, measured in the same unit of length.

A graph having one x-axis and one y-axis is referred to as a cartesian plane (also known as an X-Y graph).

The orientation of these two axes is perpendicular.

The graph's exact center is marked by the origin (O).

So, we have the points:

(4.5,1.5), (0.5, – 1.5), and (1.5, – 2.5)

Now, the graph is as follows:

(Refer to the graph attached below)

Therefore, the points  (4.5,1.5), (0.5, – 1.5), and (1.5, – 2.5) have been graphed on the coordinate plane (Refer to the graph attached below.)

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