15. "Twice a number, increased by 13, is -21.“

Answer:

the anwser is 5

Step-by-step explanation:  5

Answer:

(-4,-2)

Step-by-step explanation:

Answer: (-4,-4)

Step-by-step explanation: the y- coordinate stays the same you would have to move the x-coordinate only which would give you -4. Because you are adding 2 to -6.

On solving the Power equals Current times voltage as an equation we get power is P = VI

A mathematical equation is a fοrmula that joins twο statements and uses the equal symbol (=) to indicate equality. A mathematical statement that establishes the equality of twο mathematical expressions is knοwn as an equation in algebra. For instance, in the equatiοn 3x + 5 = 14, the equal sign places the variables 3x + 5 and 14 apart. The relationship between the twο sentences οn either side of a letter is described by a mathematical fοrmula. Often, there is only οne variable, which also serves as the symbol. fοr instance, 2x – 4 = 2.

Given to write

Power equals current times voltage

in mathematical equation, i.e.

P = V × I

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The equation (p+1)x² + (2p+3)x+ (p+2)=0 has real roots for all real values of p at x = -1, -2

A polynomial equation is a mathematical equation in which the polynomial is set to zero. The equation is made up of variables, non-negative integer exponents, coefficients, arithmetic operations, and an equal sign.

Given that:

(p+1)x² + (2p+3)x + (p+2) = 0

Open brackets;

px² + x² + 2px + 3x + p + 2 = 0

Move all terms not containing p to the right side of the equation.

px² +  2px + p = −x² − 3x − 2

Factor p out of px² + 2px + p.

p(x² + 2x + 1) = −x² − 3x − 2

Factor using the perfect square rule.

p(x+1)² = −x² − 3x − 2

Divide each term in p( x + 1 )² = −x² − 3x − 2 by (x + 1)² and simplify.

[tex]p= - \dfrac{x^2}{(x+1)^2}-\dfrac{3x}{(x+1)^2}-\dfrac{2}{(x+1)^2}[/tex]

Set [tex]p= - \dfrac{x^2}{(x+1)^2}-\dfrac{3x}{(x+1)^2}-\dfrac{2}{(x+1)^2}[/tex] to be equal to zero;

[tex]- \dfrac{x^2}{(x+1)^2}-\dfrac{3x}{(x+1)^2}-\dfrac{2}{(x+1)^2}=0[/tex]

Solve for x;

-x² - 3x - 2 = 0

Factor the left side of the equation.

-(x + 1) (x + 2) = 0

x = -1

x = -2

The final solution is all the values that make -(x + 1) (x + 2) = 0 true

x = -1, - 2

Exclude the solutions that do not make  [tex]- \dfrac{x^2}{(x+1)^2}-\dfrac{3x}{(x+1)^2}-\dfrac{2}{(x+1)^2}=0[/tex] true.

Therefore, x  = -2

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Answer:

Step-by-step explanation:

To find the probability of the sum of two randomly selected numbers from a set being greater than 12, we need to first find the total number of possible combinations of two numbers and then count the number of combinations that result in a sum greater than 12.

The set contains four numbers, so there are 4 choose 2 possible combinations of two numbers, which is equal to (4! / (2! * (4 - 2)!)), or 6 combinations. These combinations are:

(0,6), (0,12), (0,15), (6,12), (6,15), (12,15)

Next, we'll count the number of combinations that result in a sum greater than 12. These combinations are:

(6,15), (12,15)

There are 2 combinations that result in a sum greater than 12.

Finally, to find the probability, we'll divide the number of favorable outcomes (combinations with a sum greater than 12) by the total number of outcomes (all possible combinations of two numbers), and express the result as a fraction:

probability = 2 / 6

Reducing the fraction, we get:

probability = 1 / 3

So, the probability that the sum of two randomly selected numbers from the set is greater than 12 is 1/3.

That's how you find the probability of the sum of two randomly selected numbers from a set being greater than a certain value. By counting the number of favorable outcomes and dividing by the total number of possible outcomes, you can find the probability of a certain event.

The triangles ΔPQM and ΔPRM are congruent. Then angle Q is identical to angle R.

The polygonal shape of a triangle has a number of sides and three independent variables. Angles in the triangle add up to 180°.

The line segment PM is the median of the isosceles triangle ΔPQR.

Point M is the midpoint of QR by the definition of the median.

In triangles ΔPQM and ΔPRM, then we have

PQ = PR                   {Given}

QM = RM                 {Mid point}

MP = MP                  {Reflexive property}

The triangles ΔPQM and ΔPRM are congruent to each other by SSS postulates.

∠Q = ∠R

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The complete question is given below.

The line segment PM is the median of the isosceles triangle ΔPQR. Drag and drop a statement or reason to each box to complete the proof.

Given: PQ ≅ PR

Prove: ∠Q ≅ ∠R

Answer:

The expected number of blue marbles in a sample of 8 marbles would be 4 times the number of green marbles, so 4 * 8 = 32. Thus, the expected number of blue marbles in a sample of 8 marbles is 32.

Step-by-step explanation:

The required simplified expression for "Two times the sum of a number and five" is 2x + 10.

An algebraic expression is defined as when the expression is formed with help of variables such as x, y z, and so on. in the format of x + y + z or in any mathematical operation.

Here,
The phrase "Two times the sum of a number and five" can be written as

= 2(x + 5)

This is an algebraic expression that represents the value of two times the sum of the unknown number (represented by "x") and five.

We can simplify this expression by distributing the 2

= 2(x + 5) = 2x + 10

Therefore, the simplified expression for "Two times the sum of a number and five" is 2x + 10.

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Answer: A) $725

Step-by-step explanation:

The value of the asset that the business bought with $300 cash and $425 on credit is $725. The total amount that the business spent on the equipment is equal to the sum of the cash and the credit, which is $300 + $425 = $725.

The volume of the composite figure is 2592 cubic feet.

The area that any composite shape covers is known as the area of composite shapes. The composite shape is a shape created by joining a small number of polygons to create the desired shape. These shapes or figures can be constructed from a variety of shapes, including triangles, squares, quadrilaterals, etc. To calculate the area of a composite object, divide it into simple shapes such a square, triangle, rectangle, or hexagon.

The volume of the figure = Volume of the mounted object + Volume of the base object.

The volume of the mounted object is:

V = (l)(b)(h)

V = (9)(12)(6)

V = 648 cubic feet.

The volume of the base object is:

V = (l)(b)(h)

V = (27)(12)(6)

V = 1944 cubic feet.

The total volume of the composite figure is:

V = 648 + 1944

V = 2592 cubic feet

Hence, the volume of the composite figure is 2592 cubic feet.

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If the diameter of the tub is 8 inches, then the height of gallon tube is,  5.25 inches

Surface area is the sum of the areas of all the faces (or surfaces) of a three-dimensional object. It is a measure of how much area the surfaces of an object take up in two dimensions. The surface area of a solid can be found by adding up the areas of its faces.

The surface area of a cylinder can be expressed as:

SA = 2πr² + 2πr x h

where r is the radius of the cylinder, h is its height, and π is the constant pi (3.14).

The diameter of the tub is 8 inches, which means the radius is 4 inches. We are also given that the total surface area is 232.36 square inches.

So we can write:

232.36 = 2(3.14)(4²) + 2(3.14)(4)(h)

Simplifying and solving for h, we get:

232.36 = 100.48 + 25.12h

131.88 = 25.12h

h = 131.88/25.12

h ≈ 5.25 inches

Therefore, the height of the ice cream tub is approximately 5.25 inches.

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Answer: A. Parallelogram

Step-by-step explanation:  A parallelogram is a four-sided polygon with opposite sides that are parallel and equal in length.

The value of length AC is,

⇒ AC = 31

The process of combining two or more numbers is called the Addition. The 4 main properties of addition are commutative, associative, distributive, and additive identity.

Given that;

The lengths are,

AB = 12 and BC = 19

Now, If the points A, B and C are colinear.

Then, The value of length AC is,

⇒ AC = AB + BC

⇒ AC = 12 + 19

⇒ AC = 31

Thus, We get;

⇒ AC = 31

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Answer: the maximum score was 10 feet.

Step-by-step explanation:

here's a step-by-step explanation:

Identify the minimum score: The minimum score is given in the problem as 4 feet.

Identify the range: The range is also given in the problem as 6 feet.

Calculate the maximum score: To find the maximum score, we simply need to add the minimum score and the range.

Maximum score = Minimum score + Range

Maximum score = 4 feet + 6 feet

Maximum score = 10 feet

So the maximum score was 10 feet.

Given the information that the average of the ages of 5 women is 47 years and that their ages are 48, y, 52, 50, and (2y-5), we can set up the following equation:

(48 + y + 52 + 50 + 2y - 5) / 5 = 47

Expanding the equation and simplifying, we get:

5y = 244

y = 48.8

So the age of the woman whose age is represented by the variable y is 48.8 years.

The oldest woman is represented by the age of 52 years, which is the largest of all the ages.

Therefore, the age of the oldest woman is 52 years.

Answer:

I honestly don't know I just need points

The number line of the inequality is (d)

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

3x+2≤4x+5≤9

When this is expanded, we have

3x + 2 ≤ 4x + 5 and 4x + 5 ≤ 9

Evaluate the like terms

So, we have the following representation

-x ≤ 3 and 4x ≤ 4

Divide by the coefficient of x

x ≥ -3 and x ≤ 1

When combined, we have

-3 ≤ x ≤ 1

So x is between -3 and 1, inclusive.

This is represented by the number line (d)

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The next two terms of the number sequence 2,3,5,9,17,33,65 are given as follows:

129, 257.

This is a recursive number sequence, as each term is obtained multiplying the previous term by 2 and then subtracting one.

Then the term after 65 is given as follows:

65 x 2 - 1 = 130 - 1 = 129.

The term after 129 is given as follows:

2 x 129 - 1 = 257.

Then the next two terms are 129 and 257.

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The truth value for the logical proposition is 1) T 2) F 3) T 4) F 5) T

The rules of mathematical logic specify methods of reasoning mathematical statements. Greek philosopher, Aristotle, was the pioneer of logical reasoning. Logical reasoning provides the theoretical base for many areas of mathematics and consequently computer science. It has many practical applications in computer science like the design of computing machines, artificial intelligence, the definition of data structures for programming languages etc.

Propositional Logic is concerned with statements to which the truth values, “true” and “false”, can be assigned. The purpose is to analyze these statements either individually or in a composite manner

the truth value of the following statements if the universe of discourse of each variable is the set of real numbers. Enter your answer as T or F.

1) there exists x for all y xy=0  is true     T

2) there exist x x2=-1                               F

3) for all x2=y                                           T

4) for all x there exist  x=y2                     F

5) for all x not equal to zero xy=1           T                            

The complete question is -

the truth value of the following statements if the universe of discourse of each variable is the set of real numbers. Enter your answer as T or F.

1) there exists x for all y xy=0  is true    

2) there exist x x2=-1                              

3) for all x2=y                                          

4) for all x there exist  x=y2                    

5) for all x not equal to zero xy=1      

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The linear equation can be written as:

y = (3/2)*x - 21/5

A general linear equation can be written as:

y = m*x + b

Where m is the slope and b is the y-intercept.

First, we know that our line has the same slope than:

3x - 2y = 12

Rewriting that we will get:

3x - 2y = 12

3x - 12 = 2y

(3/2)x - 12/2 = y

So the slope of this line is (3/2).

And our lie has the same y-intercept as 5y + 21 = 4x

We can rewrite that to get:

5y = 4x - 21

y = (4/5)x - 21/5

The y-intercept is -21/5

Then the linear equation is:

y = (3/2)*x - 21/5

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Answer:

64 is not divisible by 6 because although it is divisible by 2, it is not divisible by 3 so it is not divisible by 6.

Step-by-step explanation:

Answer:

The circumference of one of the semicircles with a radius of 7 meters would be approximately 21.98 meters.

Step-by-step explanation:

The circumference of a circle can be calculated using the formula:

C = 2πr

where C is the circumference, π (pi) is approximately equal to 3.14, and r is the radius of the circle.

For a semicircle with a radius of 7 meters, the circumference can be calculated as follows: Because the semicircle is a half circle, then:

C = (2πr)/2= 3.14 × 7 = 21.98 meters

So, the circumference of one of the semicircles with a radius of 7 meters would be approximately 21.98 meters.

Answer:

The circumference of one of the semicircles is 21.98 m.

Step-by-step explanation:

The formula for the circumference of a circle is C = 2πr, where r is the radius of the circle.

A semicircle is half a circle, therefore the length of the curved part of the circumference of a semicircle is half the circumference of a circle: πr.

Given the radius of one of the semicircles is 7 m and π ≈ 3.14, the circumference of the semicircle is:

⇒ C = 3.14 · 7

⇒ C = 21.98 m

Answer:

Step-by-step explanation:

The ansewr is C

Answer: 523.3cm^3

Step By Step Explanation:-The volume of a sphere can be calculated using the formula:

V = (4/3) * π * r^3

where r is the radius of the sphere. The diameter of the sphere is 10 cm, so the radius is half of that, or 5 cm.

Substituting the radius into the formula, we get:

V = (4/3) * π * (5 cm)^3

= (4/3) * π * 125 cm^3

= approximately 523.6 cm^3

So, the closest measurement to the volume of the sphere in cubic centimeters is approximately 523.3 cm^3.

The complete question:

Which inequality's solution is graphed here?

A) x + 8 < 5

B) x - 5 < 8

C) x + 5 < 8

D) x - 8 < 5

The given graph represents on the number line is represented by inequality  x - 5 < 8. So option B is correct.

Real numbers are represented by a straight line known as a number line. The distance between the dots on the line, which correlates to the magnitude of the numbers, is how the numbers are typically represented. Positive or negative numerals can be used, and they are normally marked at regular intervals.

Given that,

A graph,

which has values less than 13,

In form of inequality it can be written as,

x < 13

And inequality x - 5 < 8,

can be written as  x < 13

Hence, the option b is correct inequality.

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Answer:

s = 13.6

m∠T = 35.7°

m∠U = 61.3°

Step-by-step explanation:

• Solving for side s:

To find the length of side s, we have to use the cosine rule:

[tex]\boxed{a^2 = b^2 + c^2 - 2bc \ cosA}[/tex],

where:

In this case, the unknown side is s, and the sides adjacent to it have lengths of 8 and 2. The angle opposite to s is ∠S = 83°. Therefore,

[tex]s^2 = 8^2 + 12^2 -2(8)(12) \cdot cos(83^{\circ})[/tex]

⇒ [tex]s = \sqrt{8^2 + 12^2 -2(8)(12)\cdot cos(83^{\circ})}[/tex]

⇒ [tex]s = \bf 13.6[/tex]

• Solving for m∠T:

In order to find m∠T, we can use the sine rule:

[tex]\boxed{\frac{sinA}{a}= \frac{sinB}{b} =\frac{sinC}{c}}[/tex],

which means that the ratios of the sines of angles and their opposite sides are equal for a triangle.

The side opposite to ∠T is US = 8. Therefore:

[tex]{\frac{sinT}{8} = \frac{sin(83^{\circ})}{13.6}}[/tex]

⇒ [tex]sinT= \frac{sin(83^{\circ})}{13.6} \times 8[/tex]

⇒ [tex]T = sin^{-1}( \frac{sin(83^{\circ})}{13.6} \times 8)[/tex]

⇒ [tex]T = \bf 35.7^{\circ}[/tex]

• Solving for m∠U:

Now that we know the values of two angles of the triangle, we can calculate the third angle using the fact that the angles in a triangle add up to 180°:

∠U + ∠S ∠T = 180°

⇒ ∠U + 83° + 35.7° = 180°

⇒ ∠U = 180° - 83° - 35.7°

⇒ ∠U = 61.3°

The required angle of the elevation at point C to A is given as ∠C = 31°.

The angle of elevation is the angle between a horizontal line of sight and a line of sight that is directed upwards to an object or point. In other words, it is the angle between the horizontal and an observer's line of sight to an object above the observer

Here,
A figure has been shown, Consider triangle ABC, where ∠A = 59, ∠B = 90°,
Since the sum of the angle in the triangle should be 180°.
∠A + ∠B + ∠C = 180
∠C + 90 + 59 = 180
∠C = 90 - 59
∠C = 31°

Thus, the required angle of the elevation at point C to A is given as ∠C = 31°.

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