hallar el valor numérico de las siguientes expresiones : a=1 b=2 c=3 d=4


1. (a+b)(a-b)

2. (a+b)(b-a)

con el procedimiento please

Answer:

Step-by-step explanation:

To find the lower, middle, and higher quartiles of the given data set, we need to first order the data from lowest to highest:

5, 6, 7, 8, 9, 10, 12, 14, 15, 17, 18, 19

The total number of values in the set is 12, so the middle value (or the median) will be the average of the 6th and 7th values:

Median = (9 + 10) / 2 = 9.5

To find the lower quartile (Q1), we take the median of the lower half of the data set, which includes the first six values:

Lower half: 5, 6, 7, 8, 9, 10

Q1 = median of the lower half = (7 + 8) / 2 = 7.5

To find the higher quartile (Q3), we take the median of the upper half of the data set, which includes the last six values:

Upper half: 12, 14, 15, 17, 18, 19

Q3 = median of the upper half = (15 + 17) / 2 = 16

Therefore, the lower quartile is 7.5, the middle quartile is 9.5, and the higher quartile is 16.

The length of side AB of the isosceles triangle is 8x + 5.

The formula for finding the length of a isosceles triangle side is given by:

Length of side = √x² +  y²

Where x and y are the lengths of the other two sides.

To find the length of the side AB, we need to first calculate x and y. We know that BC = 4x + 4 and CA = 3x + 9.

Therefore, [tex]x = BC - CA = 4x + 4 - 3x - 9 = x + -5[/tex]

And [tex]y = CA - BC = 3x + 9 - 4x - 4 = -x + 5[/tex]

Substituting these values in the formula, we get:

Length of side AB = √((x + -5)² + (-x + 5)²)

= √((x² + 25) + (x² + 25))

= √(2x² + 50)

= √(2(8x + 5)²)

= √(16x2 + 80x + 25)

= 8x + 5

Therefore, the length of side AB is 8x + 5.

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Answer:

8d[tex]\sqrt{e}[/tex]

Step-by-step explanation:

using the rule of radicals

[tex]\sqrt{ab}[/tex]  = [tex]\sqrt{a}[/tex] × [tex]\sqrt{b}[/tex]

given

[tex]\sqrt{25d^2e}[/tex] - [tex]\sqrt{d^2e}[/tex] + 2[tex]\sqrt{4d^2e}[/tex]

evaluating each term separately

[tex]\sqrt{25d^2e}[/tex]

= [tex]\sqrt{25}[/tex] × [tex]\sqrt{d^2}[/tex] × [tex]\sqrt{e}[/tex]

= 5 × d × [tex]\sqrt{e}[/tex]

= 5d[tex]\sqrt{e}[/tex]

-------------------

[tex]\sqrt{d^2e}[/tex]

= [tex]\sqrt{d^2}[/tex] × [tex]\sqrt{e}[/tex]

= d × [tex]\sqrt{e}[/tex]

= d[tex]\sqrt{e}[/tex]

-------------------

[tex]\sqrt{4d^2e}[/tex]

= [tex]\sqrt{4}[/tex] × [tex]\sqrt{d^2}[/tex] × [tex]\sqrt{e}[/tex]

= 2 × d × [tex]\sqrt{e}[/tex]

= 2d[tex]\sqrt{e}[/tex]

-----------------------

then combining them gives

5d[tex]\sqrt{e}[/tex] - d[tex]\sqrt{e}[/tex] + 2(2d[tex]\sqrt{e}[/tex])

= 4d[tex]\sqrt{e}[/tex] + 4d[tex]\sqrt{e}[/tex]

= 8d[tex]\sqrt{e}[/tex]

Answer:

arc length ≈ 23.6 cm

Step-by-step explanation:

the arc length is calculated as

arc = circumference of circle × fraction of circle

     = 2πr × [tex]\frac{1.25\pi }{2\pi }[/tex] ( r is the radius ) ( cancel 2π on numerator/denominator )

    = 2 × 3 × 1.25π

    = 7.5π

    ≈ 23,6 cm ( to the nearest tenth )

A. The relationship between ∠7 and ∠8 is that they are vertically opposites angles and they are equal.

B. Since 5y-29 and 3y+19 are vertically opposites angles, we can say equate the two angles (i.e. 5y-29 = 3y+19) and then solve for y.

C. y = 24, ∠7 =  89° and ∠8 = 89°

Angle geometry deals with the study of angles, their measurement, and their properties. An angle is formed when two lines or line segments intersect each other at a point.

A. The relationship between ∠7 and ∠8 is that they are vertically opposites angles. Since vertically opposites angles are equal, we can say  ∠7 = ∠8.

B. Since 5y-29 and 3y+19 are vertically opposites angles, we can say equate the two angles (i.e. 5y-29 = 3y+19) and then solve for y

C. 5y-29 = 3y+19

5y-3y= 19 + 29

2y = 48

y = 48/2

y = 24

Let's find either the value of  5y-29 or 3y+19:

Put y = 24 in 5y-29

5y-29 = 5(24) - 29 = 91°

∠7 + (5y-29) = 180°  (sum of angles on a straight line is 180°)

∠7 +  91° = 180°

∠7 = 180 - 91 = 89°

Since  ∠7 = ∠8

∠8 = 89°

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Answer:

3cm

Step-by-step explanation:

Perimeter is the boundary or outer line of a shape

Rectangle has 4 sides.

2 sides of top and bottom, being the same size

And 2 sides of left and right sides being the same size.

Perimeter of Rectangle = 9+5+9+5 = 28

Regular Pentagon has 5 equal sides.

So perimeter is: 5+5+5+5+5 = 25

Difference is biggest take away smallest

Therefore 28-25 = 3

Answer = 3cm

The standard deviation is (a).4

Given that the variance of a distribution is 16, the mean is 12, and the number of cases is 24.

A standard deviation (SD) is a measure of how dispersed the data is in relation to the mean. Whereas, variance is a measure of how data points differ from the mean.

The formula for variance can be expressed as the square of the standard deviation (SD). Therefore, the formula for standard deviation is the square root of the variance.

SD =  sqrt(variance)

SD =  sqrt(16)

SD = 4

Hence, the standard deviation for the given data is 4.

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Answer:

Step-by-step explanation:

No solution.

The two equations represent two different lines with the same slope (6), but different y-intercepts (9 for equation C and 2 for equation D). Since lines with different slopes will intersect at one point, and these two lines have the same slope but different y-intercepts, they are parallel and will never intersect. Therefore, there are no solutions to the system of equations.

The number of sides of the polygon is equal to the sum of the interior angles divided by the sum of the exterior angles, multiplied by two.

The number of sides of a polygon can be determined by examining the measures of its interior and exterior angles. The sum of the measures of the interior angles of the polygon is twice the sum of the measures of the exterior angles. Therefore, the number of sides of the polygon can be calculated by dividing the sum of the interior angles by the sum of the exterior angles and then multiplying that result by two. This is because the number of interior and exterior angles in a polygon are directly related. The sum of the interior angles is always equal to (n-2) times 180 degrees, where n is the number of sides of the polygon. Likewise, the sum of the exterior angles is always equal to 360 degrees. Therefore, the number of sides of the polygon is equal to (sum of the interior angles divided by the sum of the exterior angles) multiplied by two.

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so if the inital amount in the body is 10mg, so half that will just be 5mg, so how long will that be?

[tex]\qquad \textit{Amount for Exponential Decay} \\\\ A=P(1 - r)^t\qquad \begin{cases} A=\textit{current amount}\dotfill & 5~mg\\ P=\textit{initial amount}\dotfill &10~mg\\ r=rate\to 20\%\to \frac{20}{100}\dotfill &0.2\\ t=hours\dotfill &t\\ \end{cases}[/tex]

[tex]5 = 10(1 - 0.2)^{t} \implies \cfrac{5}{10}=0.8^t\implies \cfrac{1}{2}=0.8^t\implies \log\left( \cfrac{1}{2} \right)=\log(0.8^t) \\\\\\ \log\left( \cfrac{1}{2} \right)=t\log(0.8)\implies \cfrac{\log\left( \frac{1}{2} \right)}{\log(0.8)}=t\implies \stackrel{ \textit{about 3 hrs and 6 mins} }{3.1\approx t}[/tex]

One possible equation for the function shown in the table is:

y = 10 * (0.5)^x

This equation represents an exponential function with a base of 0.5 (i.e. each value is half of the previous value) and an initial value of 10 (i.e. y = 10 when x = 0).

To verify this equation, we can plug in the x-values from the table and see if we get the corresponding y-values:

- When x = 0: y = 10 * (0.5)^0 = 10 * 1 = 10 (matches the table)

- When x = 1: y = 10 * (0.5)^1 = 10 * 0.5 = 5 (matches the table)

- When x = 2: y = 10 * (0.5)^2 = 10 * 0.25 = 2.5 (matches the table)

- When x = 3: y = 10 * (0.5)^3 = 10 * 0.125 = 1.25 (matches the table)

- When x = 4: y = 10 * (0.5)^4 = 10 * 0.0625 = 0.625 (matches the table)

Therefore, the equation y = 10 * (0.5)^x represents the function shown in the table.

Hope this helps if can

Answer: "A. 3/8"

Step-by-step explanation:

STEP 1: Determine the probability the spinner lands on a multiple of 3. To do this, write out the numbers on the spinner (1-8), and cross out every non-multiple of three (1, 2, 4, 5, 7, 8), this will leave the numbers 3 and 6 unmarked. This being said, 2/8 (1/4) of the numbers on the spinner are multiples of 3.

STEP 2: Determine the probability the spinner lands in a dark green region. In order to do this, write the numbers on the spinner out (1-8), and circle every number representing a dark green region (1, 3, 5, 7). This should leave four numbers (2, 4, 6, 8) un-circled, meaning 4/8 (1/2) of the numbers represent a dark green region.

STEP 3: Add the two answers together (1/4 + 1/2), and you should get the answer 3/8 (A).

NOTE: When adding fractions, make sure they have the same denominators. For example, in this problem, changing 1/2 to 2/4, and doing 1/4 + 2/4, instead of 1/4 + 1/2.

The distance from the center of the habitat, located at (10, 4.25), to any point (x,y), is given as follows:

[tex]D = \sqrt{(x - 10)^2+(y - 4.25)^2}[/tex]

Suppose that we have two points of the coordinate plane, and the ordered pairs have coordinates [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex].

The shortest distance between them is given by the equation presented as follows, derived from the Pythagorean Theorem:

[tex]D = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

Hence, the distance from any point (x,y) to point (10, 4.25) is given as follows:

[tex]D = \sqrt{(x - 10)^2+(y - 4.25)^2}[/tex]

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Answer:

30°

Step-by-step explanation:

All angles add up to 180°

x + 4x + 30 = 180

Combine like terms

5x + 30 = 180

Isolate the x ( subtract 30 from both sides)

5x = 150

Divide both sides by 5

x = 30°

Answer:

Which of the following is divisible by 8?

9731

9641

9832 ÷ 8

= 1229

Step-by-step explanation:

You're welcome.

Answer:

The answer to your question is 9632.

Step-by-step explanation:

9731 ÷ 8 = 1216.375 ← Uneven

9641 ÷  8 =  1205.125 ← Uneven

9632 ÷ 8 =  1204 ← Even

I hope this helps and have a wonderful day!

Recall a couple properties of logarithms.

log(ab) = log(a) + log(b)

log(a/b) = log(a) - log(b)

So, [tex]log_{12}(\frac{\frac{1}{2}}{8w})=log_{12}(\frac{1}{2})-log_{12}(8w)=log_{12}(\frac{1}{2})-(log_{12}(8)+log_{12}(w))[/tex]

a=d  1.co interior angle  2. are equal

b=c 1. co interior angle 2. are equal

A transversal that crosses two parallel lines creates alternate angles, which are a pair of angles. Alternative angles are often referred to as "Z-angles" or "alternate internal angles."

∠a=∠d (because co interior angle i.e, a and d are equal)

∠b=∠c (because co interior angle i.e, b and c are equal)

Both sides are parallel, so co interior angle rule satisfies.

Hence, a=d  1.co interior angle  2. are equal

b=c 1. co interior angle 2. are equal

Co-interior angles form between two parallel lines when a transversal crosses them. On the same side of the transversal, the two angles always sum to 180 degrees. Drawing a C shape helps us identify co-interior angles rather frequently. Only when both inner angles are 90 degrees are they equal.

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Answer:

look below i promise its the answer

Answer:

Step-by-step explanation:

To find the percentage decrease, we need to calculate the difference between the original price and the new price, and then express that difference as a percentage of the original price.

The difference between the original price of $115 and the new price of $69 is:

$115 - $69 = $46

To express this as a percentage of the original price, we need to divide the difference by the original price and multiply by 100:

($46 / $115) x 100% = 40%

Therefore, the percentage decrease in the price of the item is 40%.

The probability of making a basket on the sixth shot is 0.075. The probability that the first and second baskets occur on the fourth and eighth shots is 0.031.

For the first shot to be on the sixth trial, five earlier shots must have failed.

The probability of a missed basket is 1 - 0.45 = 0.55.

The probability of five missed baskets in a row is (0.55)5 = 0.166.

The probability of making a basket on the sixth shot is 0.45.

Hence, the probability of making a basket on the sixth shot is 0.45 * 0.166 = 0.075.
There are a few possible ways to get the first and second baskets to happen on the fourth and eighth shots, respectively.

In the end, either of the following two paths will work:
4 failures, then 2 successes, then 2 failures
3 failures, then 1 success, then 1 failure, then 1 success, then 2 failures
Using the multiplication rule, we get the following probabilities for each course:
P(4 failures, 2 successes, 2 failures) = (0.55)4 * (0.45)2 * (0.55)2

= 0.018
P(3 failures, 1 success, 1 failure, 1 success, 2 failures) = (0.55)3 * (0.45) * (0.55) * (0.45) * (0.55)2

= 0.013
The probabilities of the two possible routes must be summed up to arrive at the answer.
Hence, the probability that the first and second baskets occur on the fourth and eighth shots, respectively, is 0.018 + 0.013 = 0.031.

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Straight path without bends,

A line connects points in space,

End to end it goes.

A line is a fundamental concept in geometry and is defined as a straight, one-dimensional figure with no thickness or width that extends infinitely in both directions. Lines can be drawn and measured, and they play a crucial role in many geometric and mathematical concepts, including angles, shapes, and equations. In addition to being a key concept in mathematics, lines are also used in art, design, and architecture. In art, lines can be used to create shapes, texture, and movement, while in design and architecture, lines are used to create structure, define space, and create a sense of balance and proportion.

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Complete question:

Use the same syllable pattern to create an original haiku about the term line.

Given the variety of morning cereals sold, option B. Histogram is the graphical representation that would be best suitable for the data. This is because there is a large set of data.

Because they offer a visual depiction of the data distribution, histograms are utilised for big collections of data. They are especially helpful for figuring out how continuous variables, like measurements or time series data, are distributed.

Histograms have a number of benefits, one of which is the simplicity with which massive sets of data may be compared. It is simple to see the overall shape of the distribution and spot trends or outliers when the data are represented as bars. Histograms can also be used to compare many sets of data simultaneously, making it simple to compare various groupings or changes over time.

Histograms also have the advantage of allowing for the identification of a dataset's underlying probability-distribution, which is advantageous for statistical analysis and modelling.

This is why, due to the size of the data and the fact that it includes information from 1,000 distinct grains, a histogram works best to display it.

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Answer:

Histogram, because there is a large set of data

Step-by-step explanation:

Hope this helps :)

If Yolanda bought 1/4 lb. of turkey and 2/4 lb. of ham at store, then ounces of meat Yolanda buy at the store is 12 ounces.

We know that there are 16 ounces in one pound.

So, to convert fractions of a pound to ounces, we multiply the weight in pounds by 16.

Yolanda bought 1/4 lb. of turkey, which is:

⇒ 1/4 × 16 = 4 oz,

And Yolanda bought 2/4 lb. of ham, which is:

⇒ 2/4 × 16  = 8 oz.

So, Yolanda bought a total of ; 4 oz. + 8 oz. = 12 oz.

Therefore, Yolanda bought a total of 12 ounces of meat.

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Answer:

x = 154°

Step-by-step explanation:

Given information,

→ The line l & m are parallel to each other.

Now we have to,

→ Find the required value of x.

We know that,

→ Parallel lines are equal to each other.

Forming the equation,

→ x + 26° = 180°

Then the value of x will be,

→ x + 26° = 180°

→ x = 180° - 26°

→ [ x = 154° ]

Hence, the value of x is 154°.

The proportions from each set of numbers are 66:99, 45:14, 5:48.  

A proportion is a statement that two ratios are equal. In other words, it is a way to compare two quantities or numbers using a fraction or ratio.

Here are the proportions using 4 numbers from each set:

1) 66:99 = 8:12

2) 45:14 = 25:7

3) 5:48 = 1:9

4) 9:45 = 1:5

5) 72:9 = 8:1

For example, if we say that the ratio of boys to girls in a classroom is 2:3, we can write the proportion as:

boys/girls = 2/3

Proportions are useful in many different areas, including mathematics, science, and statistics. They can be used to solve problems involving ratios, percentages, and other types of numerical relationships. In statistics, proportions are often used to represent the proportion of individuals in a population who have a certain characteristic or attribute, such as a disease or a trait.

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If the pennants have a base of 2 meters, the area of one of the larger pennants is 4m².

It is determined by multiplying the length of the rectangle by its width. The formula for area of a rectangle is Area = Length × Width (A = L × W).

To calculate this, we can use the formula for area of a rectangle which is length multiplied by width.

In this case, the length and width of the pennant is both 2 meters, so we can calculate the area by multiplying 2m * 2m= 4m².

The sports team asked Katie to make 30 larger pennants, so the total area of all the pennants will be 120m² (4m² * 30).

This means that the total area of the 30 larger pennants is 120m².

The formula for area of a rectangle can be used to calculate the area of any shape that is rectangular in nature.

Therefore, it can be used to calculate the area of a pennant, or any other shape that is rectangular in nature.

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Answer:

To find the slope of line AB, we use the slope formula:

slope of AB = (yB - yA) / (xB - xA)

where A = (-10, 8) and B = (2, 3).

slope of AB = (3 - 8) / (2 - (-10)) = -5/12

The slope of a line perpendicular to AB will have a negative reciprocal slope, so its slope will be 12/5.

Using the slope-intercept form of the equation of a line:

y = mx + b

where m is the slope and b is the y-intercept, we can find the equation of the line that passes through point X (-5, 10) and has a slope of 12/5.

10 = (12/5)(-5) + b

10 = -24/5 + b

b = 74/5

Therefore, the equation of the line that is perpendicular to AB and passes through point X is:

y = (12/5)x + 74/5

Answer:

h=-12

Step-by-step explanation:

h/6 -1 =-3

h/6= -2

h=-12

Answer:

Step-by-step explanation:

[tex]\tt \cfrac{h}{6}-1=-3[/tex]

Add 1 to both sides:-

[tex]\tt \cfrac{h}{6}-1+1=-3+1[/tex]

[tex]\tt \cfrac{h}{6}=-2[/tex]

Multiply both sides by 6:-

[tex]\tt \cfrac{6h}{6}=6\left(-2\right)[/tex]

[tex]\tt h=-12[/tex]

________________________

Hope this helps!

Answer:

$0.25

Step-by-step explanation:

To find the unit price = total cost ÷ number of . units

So unit price= 0.74 ÷ 3

Unit price = $0.24666666667 per yard

Rounding this to the nearest cent y8ges

Unit price = $0.25 per yard

Therefore the unit price rounded to the nearest tenth is $0.25

By Pythagorean Theorem, Cos⁻¹( 12/√153) is the value of angle B.

What is Pythagorean theorem in math?

The Pythagorean Theorem states that the squares on the hypotenuse (the side across from the right angle) of a right triangle, or, in standard algebraic notation, a2 + b2, are equal to the total of the squares on the legs.

                            The theorem is named after the Greek mathematician Pythagoras, who is often credited with discovering it, despite the fact that the theorem's existence probably definitely existed before him.

 AB² = AC² + BC²

        = 12² + 3²

        = 144 + 9

        = √153

 Cosθ =  12/√153

       θ =   Cos⁻¹( 12/√153)

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