La reducción de la ecuación 7a - 9b + 6a - 4b quedaría de la siguiente forma:
23a-31b
13a-13b
13a13b
12a-12b

Answer:

2x+3 i think

The exponential equation is y = 2700 ( 1 + 0.17 )ⁿ , where n = t , the number of hours since the start of the study

The exponential growth or decay formula is given by

x ( t ) = x₀ × ( 1 + r )ⁿ

x ( t ) is the value at time t

x₀ is the initial value at time t = 0.

r is the growth rate when r>0 or decay rate when r<0, in percent

t is the time in discrete intervals and selected time units

Given data ,

Let the exponential equation be represented as y

Now , the number of bacteria cells = y

The number of hours since the start of the study = n = t

The initial number of bacteria = 2,700 cells

The percentage of increase in the cells = 17 %

So , The exponential growth formula is given by

x ( t ) = x₀ × ( 1 + r )ⁿ

Substituting the values in the equation , we get

y = 2700 ( 1 + 0.17 )ⁿ

On simplifying the equation , we get

y = 2700 ( 1.17 )ⁿ

where n = t , the number of hours since the start of the study

Hence , the equation is y = 2700 ( 1.17 )ⁿ

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Answer:

3 and 20 are NOT factors of 50.

15, 2, 5, 50, 25, and 10 are factors of 50.

Step-by-step explanation:

Hope it helps! =D

7. m<2 = 138° based on the definition of vertical angles.

8. m<3 is supplementary to angle 8

9. The measure of angle 2 = 50°

10. The value of x = 20

A supplementary angle is a pair of angles whose sum is equal to 180 degrees. In other words, two angles are supplementary if they add up to a straight angle.

For example, if one angle measures 70 degrees, its supplement would be 180 - 70 = 110 degrees.

7. m<2 = 138° (reason: vertical angles are equal).

8. m<3 is supplementary to angle 8 because angle 3 and 5 are supplementary, and angle 5 is congruent to angle 8.

9. 5x + 55 = 2x + 100 (corresponding angles are equal)

Find x:

5x - 2x = -55 + 100

3x = 45

x = 15

m<2 = 180 - (5x + 55) (linear pair is equal to 180 degrees)

Plug in the value of x

m<2 = 180 - (5(15) + 55)

m<2 = 180 - 130

m<2 = 50°

10. 45 + 5x + 35 = 180 (supplementary angles)

5x + 80 = 180

5x = 180 - 80

5x = 100

x = 20

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A cuboid has 6 faces and the formula for its total surface area is:

2lw + 2lh + 2wh, where l is the length, w is the breadth, and h is the height.

Given the total surface area of 1168 cm² and the length and breadth being 16 cm and 14 cm, respectively:

2(16)(14) + 2(16)h + 2(14)h = 1168

Expanding the expression:

448 + 32h + 28h = 1168

Combining like terms:

60h = 720

Dividing both sides by 60:

h = 12 cm

So the height of the cuboid is 12 cm.

Assuming you meant 3/12, 1/3 and 1/2. The answer would be 5[tex]\frac{1}{4\\}[/tex].

Answer:

[tex]288\frac{0}{13}[/tex]

We can use the proportional method in this question

This case is a direct proportion

Direct proportion is a type of proportionality relationship. For direct proportion, as one value increases, so does the other value and conversely, as one value decreases, so does the other value. The symbol ∝ represents a proportional relationship.

We put the variable as x that represents the hour

We put it into a fractional form

[tex]\frac{312}{13} = \frac{x}{12}[/tex]

Cross Multiplying

[tex]312X12 = 13x[/tex]

[tex]3744 = 13x[/tex]

[tex]\frac{3744}{13} = x[/tex]

[tex]288\frac{0}{13} = x[/tex]

Answer:

7. √149 ft or 12.2 ft

8. 5√2 m or 7.07 m

9. √36.75 in. or 6.06 in.

Step-by-step explanation:

7.

a² + b² = c²

7² + 10² = x²

49 + 100 = x²

x² = 149

x = √149

x ≈ 12.2

Answer: √149 ft or 12.2 ft

8.

perimeter = 20 m

side = perimeter/4 = 5 m

a² + b² = c²

5² + 5² = x²

25 + 25 = x²

x² = 50

x = 5√2

Answer: 5√2 m or 7.07 m

9.

a² + b² = c²

3.5² + x² = 7²

12.25 + x² = 49

x² = 49 - 12.25

x² = 36.75

x = √36.75 = 6.06

Answer: √36.75 in. or 6.06 in.

Answer:

  7.  12.2 ft

  8.  7.07 m

  9.  6.06 in

Step-by-step explanation:

You want the hypotenuse of at right triangle with legs 7 and 10 ft, the diagonal of a square with perimeter 20 m, and the altitude of an equilateral triangle with side length 7 inches.

These problems all make use of the Pythagorean theorem, which tells yo the relation between sides a, b and hypotenuse c of a right triangle is ...

  a² +b² = c²

The length of the leash (c) is ...

  c² = (7 ft)² +(10 ft)² = 149 ft²

  c = √149 ft ≈ 12.2 ft

The leash is about 12.2 feet long.

Each side of the square is 1/4 of the perimeter, so is 5 m. The diagonal is the hypotenuse of a right triangle with legs that length. Its measure is ...

  c = √(5² +5²) = 5√2 ≈ 7.07 . . . . meters

The length of the diagonal is about 7.07 meters.

The altitude of an equilateral triangle is a perpendicular bisector of one side. Its length is ...

  b = √(c² -a²)

  b = √(7² -3.5²) = √36.75 ≈ 6.06 . . . . inches

The altitude of the triangle is about 6.06 inches.

__

Additional comment

The triangles of problems 8 and 9 are known as the two "special" right triangles.

The side lengths of an isosceles right triangle (angles 45°-45°-90°) have the ratios 1 : 1 : √2.

The side lengths of a triangle with angles 30°-60°-90° have the ratios 1 : √3 : 2.

That is, the diagonal of the square is √2 times its side length, and the altitude of the equilateral triangle is (√3)/2 times is side length.

It can be useful to remember these triangles and their side ratios.

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Answer:

f(x)= (X+5)^2

Step-by-step explanation:

pls, tell me if wrong have a good day/night<3

Answer:

9:8

Step-by-step explanation:

We know that 72:64

If you multiply 9 by 8 you get 72, so you know that the answer will have to be simplified by 8.

64/8 = 8

Therefore your answer for this will be 9:8

The required volume of the given right rectangular prism is 2x³ - 4x² cubic units.

Volume is defined as the mass of the object per unit density while for geometry it is calculated as profile area multiplied by the length at which that profile is extruded.

here,
From the figure,
Volume = length × width × height
            = [2x - 4] × x × x
            = [2x³ - 4x²]

Thus, the required volume of the given right rectangular prism is 2x³ - 4x² cubic units.

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Answer:

x<-5

Step-by-step explanation:

-(2+2x)-2>6

-(2+2x)>8

2+2x<-8

2x<-10

x<-5

Answer:

I also believe it is -4.9 but I may be mistaken

Step-by-step explanation:

The differentiation of the f(x) = g(x)/h(x), using the quotient rule, indicates that the value of f'(2) = 20/81

The Quotient Rule for finding the derivative of a ratio of two functions, [tex]f(x) = \frac{g(x)}{h(x)}[/tex] that are differentiable is presented as follows;

[tex]f'(x) = \frac{h(x) \cdot g'(x) - g(x) \cdot h'(x)}{h(x)^2}[/tex]

The equation of the lines are found as follows;

The points on the line g(x) are; (1, 2), and (3, 6)

Therefore, we get;

Slope of the line = (6 - 2)/(3 - 1) = 2

Equation of the line is; y - 2 = 2·(x - 1) = 2·x - 2

y - 2 = 2·x - 2

y = 2·x - 2 + 2 = 2·x

The equation of the line is presented as follows;

g(x) = 2·x

Points on the graph of the function h(x) when x = 2 are; (2.5, 5), and (0, 2.5)

Slope of the graph of h(x) when x = 2 is; (2.5 - 5)/(0 - 2.5) = 1

The equation of the line is therefore; y - 5 = 1·(x - 2.5) = x - 2.5

y - 5 = x - 2.5

y = x - 2.5 + 5 = x + 2.5

h(x) = x + 2.5

f(x) = g(x)/h(x)

The value of f'(x) using the quotient rule, is therefore;

f'(x) = (h(x)·g'(x) - g(x)·h'(x))/(h(x))²

g'(x) = 2

h'(x) = 1

Therefore;

f'(x) = ((x + 2.5)×2 - 2·x  × 1)/(x + 2.5)² = (2·x + 5 - 2·x)/((x + 2.5)²)

(2·x + 5 - 2·x)/((x + 2.5)²) = 5/(x + 2.5)²

f'(2) = 5/(2 + 2.5)² = 20/81

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The answer is 506 not to sure since I haven't done this in a while

Answer:

506

Step-by-step explanation:

According to the order of operations(or PEMDAS), you would first evaluate the exponent in the problem: [tex]8^3[/tex]. [tex]8^3[/tex] is equivalent to [tex]8*8*8[/tex], which is just 512. Therefore, the equation would now be 512 - 9 * 2 ÷ 3

Next step would be to do out the multiplication and division left to right. First is 9 * 2 which is 18. Then that is divided by three to get 6. The equation would now be 512 - 6.

512 - 6 is just 506.

When triangle ABC is dilated to triangle A'BC then the line A'B' has the equation 2z+ 3y = 10.

Parallel lines are any two or more lines that all lie in the same plane and never cross one another. They are equally spaced apart and have the same incline. No matter how far we extend a parallel line, it will never meet another parallel line.

Given that the triangle ABC is dilated to get the triangle A'BC.

If the triangle is dilated then, AB is parallel to A'B'.

So, the slopes of the two line are equal.

The equation of the AB is 2x + 3y = 5.

Converting into the standard equation of line:

y = - 2/3 x + 5/3

The slope of the line is -2/3.

From the given options, the line that has slope -2/3 when converted to standard form is:

2z+ 3y = 10

Hence, when triangle ABC is dilated to triangle A'BC then the line A'B' has the equation 2z+ 3y = 10.

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Answer:350

Step-by-step explanation: 280/4=70

280+70=350

Answer:

350

Step-by-step explanation:

The percentage is converted to decimal place and then multiplied by 280

[tex]280(\frac{125}{100} )=280(1.25)=350[/tex]

Hope this helps.

The polynomial in standard form is x³ + 2x² - 3x² - 6x = 0.

Polynomial is an equation written as the sum of terms of the form kx^n.

where k and n are positive integers.

We have,

The cubic polynomial has zeros of 3, -2, and 0.

This means,

x = 3

x - 3 = 0 _____(1)

x = -2

x + 2 = 0 ______(2)

x = 0 ______(3)

Now,

The zeroes can be written as,

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

x (x² + 2x - 3x - 6) = 0

x³ + 2x² - 3x² - 6x = 0

Thus,

x³ + 2x² - 3x² - 6x = 0 is the standard form of the polynomial equation.

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Answer:

5000

Step-by-step explanation:

800/16% = 5000

a)

C = 23.8°C

b)

F = 113°F

c)

F = -4°F

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

a) 75°F

b) 45°C

c) -20°C

Conversion formulas:

C = (F - 32) / 1.8

F = 1.8C + 32

Now,

75°F

C = (F - 32) / 1.8

C = (75 - 32) / 1.8

C = 23.8°C

45°C

F = 1.8C + 32

F = 1.8 x 45 + 32

F = 113°F

-20°C

F = 1.8C + 32

F = 1.8 x (-20) + 32

F = -4°F

Thus,

The temperature conversion is given above.

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The correct value of the measure of the exterior angle is 72 degrees

You should understand that when one side of a polygon is produced, the angle so formed is called an exterior angle

Note also that two opposite interior angles equal to one exterior angle

This implies that

x+30=2x-12

Collecting like terms

x-2x=-12-30

-x=-42

the value of x is 42

Then substitute x for the exterior angle

2(42)-12

84-12 = 72

The exterior angle is 72 degrees

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The area of the figure in this problem is given as follows:

A. 30 in².

The area of a triangle is given by half the multiplication of the base length by the height of the triangle.

Applying the Pythagorean Theorem, we can obtain the missing side length, as follows:

4² + x² = 6²

x² = 36 - 16

x² = 20

x = square root of 20

x = 4.47.

For a right triangle, one side is considered the height of the other, hence the sides are:

Hence the area of the triangle is then obtained as follows:

Area = 0.5 x 4 x 12.47

Area = 25 in².

Which is closest to 30 in².

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The variance for waiting times for patients who are discharged after receiving treatment is more, so waiting times for patients who are discharged after receiving treatment is more variable.

In probability and statistics, variance is the actual value of the squared variation of a stochastic process from its mean value. Informally, variance calculates the degree to which a random group of numbers deviates from the mean value.

Another essential tool, the measurement of variance is equal to the square of the standard deviation.

Since the variance for waiting times for patients who are discharged after receiving treatment is more, so waiting times for patients who are discharged after receiving treatment is more variable.

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Answer:

60.48

Step-by-step explanation:

Answer:51.52

Step-by-step explanation:

Answer:

x=15

Step-by-step explanation:

2x-17=13

2x=30

x=15

Hope this helped! :)

Answer:

15

Step-by-step explanation:

2x - 17 = 13

Add 17 to both sides:

2x = 30

Divide both sides by 2:

[x = 15]

Answer: Let's call the length of the rectangular court "L" and the width "W". Then, the perimeter of the court is 2 * (L + W) = 148 feet, so 2 * L + 2 * W = 148 feet.

And, according to the coach's estimate, the athlete ran a total of 4 * L + 7 * W = 353 feet.

We can use these two equations to find the dimensions of the court. Solving the first equation for W:

W = (148 - 2 * L) / 2.

Substituting this expression for W into the second equation:

4 * L + 7 * (148 - 2 * L) / 2 = 353

Expanding and simplifying the right side of the equation:

4 * L + 74 - 7 * L = 353

-3 * L = -279

L = 93 feet.

Finally, using the expression for W from the first equation:

W = (148 - 2 * L) / 2 = (148 - 2 * 93) / 2 = 32 feet.

So the dimensions of the sports court are 93 feet by 32 feet.

Step-by-step explanation:

Answer: 2808 ft.

Step-by-step explanation:

72(39) = 2808

Answer:

Area for a rectangle is Length * Width or A=l*w

Length= 72ft
width= 39ft

72*39= 2808

The area of the rectangular room is 2808

Step-by-step explanation:

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The total cost for a given number of notebooks is 30 + 3x

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

Headset = $30.00

Notebook = $3.00

The total cost for x number of notebooks can be calculated as follows:

$30.00 + (3.00 * x)

So, we have

Total Cost = 30 + 3x

The response in two decimal places is Total cost = 30.00 + x * 3.00

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The updated median is 56.37 and the updated IQR is 17.66.

The median is the value in the middle of a data set, meaning that 50% of data points have a value smaller or equal to the median and 50% of data points have a value higher or equal to the median. For a small data set, you first count the number of data points (n) and arrange the data points in increasing order.

Given that, one employee recorded the measurements for the lengths of 55 different wood boards.

Median =58.37 and IQR=19.66

Someone discovers the measuring tape used started at 2 inches instead of 0.

The interquartile range is given by the difference between the 75th percentile(value that is greater than 75% of the measures) and the 25th percentile.

This means that each piece of wood is actually 2 inches shorter than the value recorded by the employee.

This means that the length of each wood is less than 5. However, the difference between the 75th percentile and the 25th percentile will stay the same, since both were subtracted by 2.

So, IQR=19.66-2 =17.66

Therefore, the updated median is 56.37 and the updated IQR is 17.66.

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The statement "the sum of measures of angles B and A is 130 degrees" is  correct. Therefore, option A, B and E are the correct answer.

An isosceles trapezoid can be defined as a trapezoid in which non-parallel sides and base angles are of the same measure. In other words, if two opposite sides (bases) of the trapezoid are parallel, and the two non-parallel sides are of equal lengths, then it is an isosceles trapezoid.

Given that, an isosceles trapezoid ABCD has two parallel sides AB and CD and m∠A = 65°.

Correct statements are

The sum of measures of angles B and A is 130 degrees.

The measure of angle D is 115 degrees.

The sum of measures of angles B and C is 180 degrees.

Therefore, option A, B and E are the correct answer.

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