What method of solving quadratic equations must be used in order to derive the quadratic formula?.

Answers

Answer 1

By utilizing the Quadratic Equations' formula for the roots, we can solve the most complex quadratic equations.

For example,

if (ax2+bx+c) = 0,

then the equation's roots

x =[—b+ —(b^2-4ac)^1/2] / 2a

Now

x^2+5x+6=0a=1 b= 5 c=6x=[ --5+ — (25-4×1×6)^1/2 ] /2x1 =( --5+1)/2 =4/2=-2X2 =[ --5-1] /2 = -3

The equation's roots are -2 and —3.

The polynomial equations of degree two in one variable of type f(x) = ax2 + bx + c = 0 and with a, b, c, and R R and a 0 are known as quadratic equations. It is a quadratic equation in its general form, where "a" stands for the leading coefficient and "c" for the absolute term of f. (x).

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Related Questions

The axis of symmetry line passes through which point?
A. Y-intercept
C. Any random point
B. Vertex
D. Symmetrical point on the vertex

Answers

The axis of symmetry line passes through the vertex of the parabola.

What is the line of symmetry?The term "line of symmetry" refers to the fictitious axis or line that can be used to fold a figure into symmetrical halves. The axis of symmetry is another name for it. Due to the fact that it displays two coincident reflections of the same image, the line symmetry is also known as a mirror line.Any combination of vertical, horizontal, and diagonal lines or axes may be used. However, there are essentially two different kinds of symmetry lines. They are: symmetry in the vertical direction. Transverse Line of SymmetryA line that splits a form exactly in half is known as a line of symmetry. This indicates that both half of the object would perfectly match if you folded it along the line.

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Mario and Luigi are making pizza for their birthday party. They need to make 25 pizza. Mario i fat and ha already made 11 pizza. Luigi i lower and only ha made 3. Write an equation with the variable (p) and how your work to determine how many pizza they have left to make

Answers

The equation for the remaining work is given by the equation  25 - (x+y)

let x be the number of pizza made by Mario and y be the number of pizza made by luigi

let z be the pizza that still need to be made

so x+y+z=25

=> z = 25 - ( x + y )

so the total remaining pizza is given by 25 - (x+y) ---(i)

given that Mario had made 11 pizza so x = 11

and Luigi had made 3 pizza so  y = 3

so total remaining work is found using equation (i)

so z = 25 - ( 11 + 3)

=> 11

so remaining work is 11

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For which value of k will the pair of linear equations 3x Y 1 and 3kx 5y 2 have no solution?.

Answers

The pair of linear equations does not have a solution when K is equal to 2.

We can solve this system of linear equations by using the process of elimination. This involves rearranging the equations to isolate one variable and then using that information to determine the values of the other variables.

The first equation should be multiplied by (k-1) and the second equation by 3.

3(3x+y)=3

(2k-1)(3x + y)=(2k-1)2k+1

Add the two equations

3(3x+y)+(2k-1)(3x+y)=(2k-1)2k+1 + 3

Simplify the equation

5kx+ (3+2k-1)y = (2k-1)2k+1 + 3

Further simplify the equation

5kx + (2k+2)y = (2k-1)2k+1 + 3

Rearrange the equation

5kx - (2k+2)y = (2k-1)2k+1 + 3 - (2k+2)

Simplify the equation

5kx - (2k+2)y = (2k-1)2k+1 -2

With the LHS set to 0 and the RHS set to a non-zero number, we can determine the value of k for which the equations cannot be solved.

5kx - (2k+2)y = 0

(2k-1)2k+1 -2 ≠ 0

Solve for k

5k = 2k +2

3k = 2

k=2

Therefore, K=2 is the value of k for which there is no solution to the pair of linear equations.

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Are the following triangles congruent? Why or why not? Yes, SSS Yes, SAS Yes, ASA No, there is not enough information​

Answers

No there is not enough information

In 2010, the population of a city was 220,000. From 2010 to 2015, the population grew by 6.2%. From 2015 to 2020, it fell by 4.5%. How much did the population grow from 2010 to 2015, to the nearest 100 people?

Answers

Answer: It grew by 13,640 people

Step-by-step explanation:

First, turn 6.2% into 0.062.

Next, multiply 0.062x220,000.

You get 13,640.

The rest of the information is unnecessary.

Square E has sides of length e cm.
Square F has sides of length f cm.

The area of square E is 44% greater than the area of square F.

Work out the ratio e:f

Answers

The ratio of e:f from 2 different squares are 1.2:1.

From the case, we have 2 squares that:

Square E side = e

Square F side = f

Area of E = (1 + 44%) Area of F

Using the area of square formula, we know that:

Area of square = side x side

Area of square = side²

Area of E = e x e

Area of E = e²

Area of F = f x f

Area of F = f²

We will compare the area of both squares:

Area of E = (1 + 44%)Area of F

e² = (1 + 44%) f²

e² = 1.44 f²

√e² = √(1.44 f²)

e = 1.2 f

Hence the ratio of e : f would be:

e : f = 1.2f : f

e : f = 1.2 : 1

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A boat is traveling in a river with a current that has a speed of 1.5 km/h . in one hour the boat can travel twice the distance downstream as it can travel upstream . what is the boat speed in Stillwater ?

Answers

Answer:

To find the speed of the boat in still water, we can use the formula:

Speed in still water = (Downstream speed + Upstream speed) / 2

We know that the speed of the current is 1.5 km/h and the boat can travel twice the distance downstream as it can travel upstream. Therefore, if the boat travels x km downstream in one hour, it travels x/2 km upstream in one hour.

We can use this information to set up the following equation:

x + (x/2) = (x + x/2) = (3/2)x = Downstream speed

And the upstream speed is x/2

Now we can substitute this value into the formula for speed in still water:

Speed in still water = ( (3/2)x + (x/2) )/2 = (3x + x)/4 = x = (3+1) km/h = 4 km/h

So, the speed of the boat in stillwater is 4 km/h.

We don't know the exact distance that the boat travels downstream in one hour, so we can't calculate the speed in still water with the given information. To find the speed in still water we need to know the distance traveled downstream or upstream.

PLSSS HELP IF TURLY KNOW THISSS

Answers

To solve the expression 9 - 12 + 6/-3 + 3(-3) first do the operation of division, i.e. option B: 6/-3.

What is an expression?

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation.

The given expression is - 9 - 12 + 6/-3 + 3(-3)

Follow the BODMAS rule to solve the expression.

BODMAS = Bracket Of Division Multiplication Addition and Subtraction

The first step is to solve the bracket -

= 9 - 12 + 6/-3 + 3(-3)

= 9 - 12 + 6/-3 - 9

The next step is to solve the division -

= 9 - 12 + 6/-3 - 9

= 9 - 12 -2 - 9

The next step is to solve the addition and subtraction -

= 9 - 12 - 2 - 9

= 9 - 23

= -14

Therefore, the value of the expression is obtained as -14.

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Solve for j.

16j = 736

Answers

Answer:

j = 46

Step-by-step explanation:

16j = 736

----    -----

16      16

j = 46

Answer:

j = 46

I did 736 divided by 16 to find the answer.



Your grandma has a bowl!
I with 20 candies in it. The
ratio of sour candy to
sweet candy is 13. How
many sweet candies are i
there? How many sour
candies are there?

Answers

Answer:

5

Step-by-step explanation:

I assume the ratio is 1:3.

We need a total of 20 candies, and we need the number of sweet candy to be 3 times the number of sour candy.

Start guessing the number of sour candy with 1. Then find the number of sweet candy. Then find the sum. Keep going up with the guess until it works.

Sour      Sweet        Sum      Comment

1              3                4           too low

2             6                8           too low

3             9                12           too low

4             12               16          too low

5             15               20         exactly right

Answer: 5

PLEASE HELP!!!

(05.05 MC)
Complete the frequency table.

What percentage of students age 15 and above travel to school by bus? Round to the nearest whole percent.

A.
36%

B.
26%

C.
45%

D.
50%

Answers

Answer:

b

Step-by-step explanation:

Help me what do I write in here

Answers

If the graph doesn't go through the origin (0,0), the relationship is not a proportional one.

What you mean by proportional graph?A graph that represents a proportional relationship between y and x will have a straight line that passes through the point of origin (0, 0). The graph shown therefore doesn't represent a graph where y is directly proportional to x.For a graph representing a relationship where y is directly proportional to x, (y = kx), the line of the graph passes through the point of origin (0, 0).When y is directly proportional to x, the quantity of y changes along with the quantity of x.The graph shown has a line that doesn't pass through the point of origin (0, 0), so it is not a proportional graph and does not represent a relationship where y is directly proportional to x.Therefore, a graph that represents a proportional relationship between y and x will have a straight line that passes through the point of origin (0, 0). The graph shown therefore doesn't represent a graph where y is directly proportional to x.

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Are there more mutations in fish populations that live in waters that contain industrial waste than those that live in clean water? Decide if this is census or sample. Justify your answer.

A)Sample. It's pretty easy to capture every fish.
B)Sample. There are too many to count.
C)Census. It's pretty easy to capture every fish.
D)Census. There are too many to count.

Answers

Answer:

B) Sample. There are too many to count.

Step-by-step explanation:

You can only check a portion of all the fish. It would take too much work and manpower to check every single fish.

A right triangle has side lengths measuring 5cm 12cm and 13 cm a similar triangle has a hypotenuse of 169cm what is the length of the shortest of the larger triangle

Answers

the answer should be B. 65cm

It takes a train going 50 mph approximately _____ to stop safely.
A. 100 ft B. 1/2 miles C. 1 1/2 miles D. 5 miles

Answers

It takes a train going 50 mph approximately 11/2 miles to stop safely.

The distance a train takes to come to a stop can be determined by several factors, including the speed of the train, the weight of the train, the condition of the brakes and the track, and the reaction time of the engineer.

In general, a train going 50 mph will take about 1 1/2 miles or 8,000 feet to stop safely. This is because a train moving at 50 mph is traveling at about 75 feet per second, and it takes a significant distance to slow down a heavy object moving at such a high speed. It's important to note that this is an estimation, and the actual stopping distance may vary depending on the specific conditions.

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Is proof by contrapositive direct or indirect?.

Answers

Contrapositive is an example for indirect proof.

Indirect proof;

When the conclusion from a hypothesis is taken to be false (or the opposite of what it states), indirect proof or proof by contradiction is achieved from the given or deduced statements.

Contrapositive method of proof;

Proof by contrapositive, also known as proof by contraposition, is an inference rule used in proofs in mathematics where a conditional statement is inferred from its contrapositive. To put it another way, the assertion "if B, then not A" is proven rather than the conclusion "if A, then B."

Proof by Contrapositive method is indirect.

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Proof by contrapositive is an indirect method of proof where we assume the negation of the conclusion and show that it leads to the negation of the hypothesis. It is a powerful tool in mathematical reasoning and can be used to prove various statements and theorems.

In mathematics, a direct proof is a method of proving a statement by providing a logical sequence of steps that directly leads from the given information to the desired conclusion. On the other hand, an indirect proof is a method of proving a statement by assuming the opposite of the desired conclusion and deriving a contradiction or an absurdity.

To prove a statement using the contrapositive, we start by assuming the negation of the conclusion. Then, we proceed to show that if the negation of the conclusion is true, then the negation of the hypothesis must also be true. In other words, we prove the contrapositive of the statement.

Here is an example to illustrate proof by contrapositive:

Statement: If a number is even, then its square is also even.

To prove this statement by contrapositive, we assume the negation of the conclusion: If a number's square is odd, then the number itself is odd.

We then proceed to show that if the negation of the conclusion is true, then the negation of the hypothesis is also true. In this case, if the square of a number is odd, then the number itself must be odd.

We can prove this by considering that any even number squared will always result in an even number. Therefore, the contrapositive of the original statement is true, which implies that the original statement is true as well.

In conclusion, proof by contrapositive is an indirect method of proof where we assume the negation of the conclusion and show that it leads to the negation of the hypothesis. It is a powerful tool in mathematical reasoning and can be used to prove various statements and theorems.

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What is 1 4 equivalent to in fractions?.

Answers

Equivalent 1/4 is equals to 4/16 in fractions.

Equivalent fractions in mathematics are ones that have the same denominator but different numerators. For instance, 2/4 and 3/6 are equivalent fractions since they both equal 1. A fraction is a piece of the total. Equivalent fractions are used to indicate identical parts of the whole.

The equivalent fraction of each fraction can be calculated by multiplying the numerator and denominator by the same integer. Equivalent fractions are ones that denote the same value despite visual disparities. You will have devoured half of a cake, for example, if you take a piece, cut it into two equal pieces, and then eat one of them.

= 1/4 is equivalent to:

= 1/4 * 4/4

= 4/16

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Correct Question:

What is 1/4 equivalent to in fractions?.

Under what condition the ratio of sine of angle of incidence to the sine of angle of refraction is always a constant?.

Answers

The ratio of the sine of the angle of incidence to the sine of the angle of refraction is always a constant when the light is traveling from a denser medium to a rarer medium and the angle of incidence is greater than the critical angle.

The ratio of the sine of the angle of incidence to the sine of the angle of refraction is always a constant under the condition of total internal reflection.

This constant is known as the refractive index of the medium in which the light is traveling. When a beam of light passes from one medium to another, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is known as the refractive index of the second medium with respect to the first medium.

Total internal reflection occurs when a beam of light passes from a medium with a higher refractive index to a medium with a lower refractive index, and the angle of incidence exceeds the critical angle. Under this condition, the light is reflected back into the original medium, instead of passing into the second medium.

In short, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is always a constant when the light is traveling from a denser medium to a less dense medium and the angle of incidence is greater than the critical angle.

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lena is sharing 36 muffins equally with some friends. She uses division to determine how many people can have a share if each person gets a particular number of muffins. For example, 36÷9=4
means that if each person gets 9 muffins, 4 people can have muffins. Here are some other calculations:


36÷9=4
36÷3=12
36÷1=36
36÷13=?


1. Elena thinks the “?
” represents a number greater than 36. Do you agree?


Agree
Agree

Disagree

Answers

Answer: Disagree.

Step-by-step explanation:

Dividend = 36

Divisor = 13

36 (Dividend) ÷ 13 (Divisor) = 2 (Quotient)

Remainder = 10

Rules of division indicate,

Quotient < Dividend

Here too, 2 < 36

Thus, the answer to 36÷13 does NOT represent a number greater than 36.

Carter plays
5
8
5
8
of a basketball game. The basketball game is 40 minutes long. Which of the following shows how to find the number of minutes Carter plays?

A.
5
×
8
8
×
8
=
40
64
5
×
8
8
×
8
=
40
64
; 40 minutes

B.
5
×
7
8
×
7
=
35
56
5
×
7
8
×
7
=
35
56
; 35 minutes

C.
5
×
5
8
×
5
=
25
40
5
×
5
8
×
5
=
25
40
; 25 minutes

D.
5
×
4
8
×
5
=
20
40
5
×
4
8
×
5
=
20
40
; 20 minutes

Answers

The total number of minutes Carter played the basketball game is 25 minutes.

The correct answer choice is option C.

What is the total number of minutes Carter plays?

Total minutes of the basketball game= 40 minutes

Minutes Carter played= 5/8 of Total minutes of the basketball game

= 5/8 × 40

= 0.625 × 40

= 25 minutes

Hence, Carter played the basketball game for 25 minutes.

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STUV is a parallelogram. Solve for SV:
S
19
4x1
2x + 3
U

Answers

The side length SV= 13 units

What is a parallelogram?

A parallelogram is the name given to a quadrilateral in geometry. In a parallelogram, the opposing sides are parallel and of equal length. The rhombus, rectangle, and square are just a few shapes that are parallelograms.

Having two sets of parallel sides makes a quadrilateral a parallelogram. A parallelogram has opposite sides that are the same length and angles that are the same size. Additionally, the internal angles on the same transverse side are supplementary. 360 degrees are equal to the total of all internal angles.

In a parallelogram, opposite sides are congruent.

ST=VU

=> 19=4x-1

=> 4x=19+1 = 20

=> x= 20/4 = 5

SV=2x+3

=>  SV=2(5)+3 = 10+3 = 13

The side length SV= 13 units

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EXPERT NEEDED I NEED THIS DONE ASAP RIGHT NOW!!!
10 POINTS!!!

Answers

Answer: It would look like this, and your equation is y = 0.5x + 0 or just y = 0.5x, you are supposed to connect the dots, as it is a linear equation with a continuous run

Step-by-step explanation:

I hope this helps!

How do you solve nth problems?.

Answers

To solve nth problems we use the formula stated as  aₙ = a + (n – 1)d.

A series in which the differences between each pair of following terms are the same is known as an arithmetic progression (AP). A formula for the nth term of the AP could be derived from this kind of progression. Because it follows a pattern where each number is acquired by adding 4 to the preceding term, the sequence 2, 6, 10, 14,... is an example of an arithmetic progression (AP). In this series, the nth term equals 4n-2. By changing the nth term to n=1,2,3,..., the sequence's terms can be obtained. i.e.,

First term when n = 1 is 4n-2 = 4. (1)

-2 = 4-2=2

second term = 4n-2 = 4 when n = 2 (2)

-2 = 8-2=6

The third term is 4n-2 = 4 for n = 3. (3)

-2 = 12-2=10

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What is the slope of a line perpendicular to the line y = −14x – 1?

Answers

The slope of the line perpendicular to the line y = ( -1/4 )x - 1 is m₂ = 4

What is an Equation of a line?

The equation of a line is expressed as y = mx + b where m is the slope and b is the y-intercept

And y - y₁ = m ( x - x₁ )

y = y-coordinate of second point

y₁ = y-coordinate of point one

m = slope

x = x-coordinate of second point

x₁ = x-coordinate of point one

The slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )

Given data ,

Let the equation of line be represented as A

Now , the value of A is

y = ( -1/4 )x - 1   be equation (1)

The slope of the line is m₁ = ( -1/4 )

Now , the product of the slopes of perpendicular lines is -1

So , m₁ x m₂ = -1

Substituting the values in the equation , we get

( -1/4 ) x m₂ = -1

m₂ = 4

So , the slope of the line perpendicular to the line A is m₂ = 4

Hence , the slope of the line is m₂ = 4

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What does a basic log graph look like?.

Answers

A basic log graph is a line graph that plots logarithmic data points plotted on a logarithmic scale.

The x-axis of the graph is the logarithmic scale, and the y-axis is the data points.

The points are plotted in a straight line, making it easy to see how the data points change as the logarithmic scale increases or decreases.

On the exponential f, identify several locations (x). The graph will look better the more points we plot.

A  two-dimensional graph of numerical data using logarithmic scales on both the horizontal and vertical axes is known as a log-log graph or log-log plot.

In order to obtain points on the inverse, swap the x and y variables. Discover the asymptote. The ensuing logarithmic functions should be plotted. the domain and the range.

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8. Find m∢PSQ if m∢PSQ = 3y - 15 and m∢PRQ = 2y + 15.

Answers

According to the presented question, m∢PSQ = 3y - 15 and m∢PRQ = 2y + 15, then m∢PSQ equals 97.

The term "supplementary angles" means what exactly?

Supplementary angles are a pair of angles that always sum to 180 degrees. These two viewpoints are referred to as complements to one another. The English word "supplementary" is derived from the Latin words "Supplere" and "Plere," which respectively mean "supply" and "fill." As a result, the term "supplementary" designates something that is added to complete a task.

In this lesson, we will study about supplementary angles and how they can be applied to various geometry problems. As we explore supplementary angles, we'll discover how they differ from complimentary angles.

We know that the measure of an angle is supplementary to its adjacent angle. That means that the measure of an angle and its adjacent angle add up to 180 degrees.

Given that m∢PSQ = 3y - 15 and m∢PRQ = 2y + 15, we can set up the equation:

m∢PSQ + m∢PRQ = 180

Plug in the values for the angles:

(3y - 15) + (2y + 15) = 180

Simplifying, we get:

5y = 180

Now we can find the value of y by dividing both sides by 5:

y = 36

Therefore, m∢PSQ = 3y - 15 = 3(36) - 15 = 97

So, the measure of angle PSQ is 97 degrees.

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According to the presented question, m∢PSQ = 3y - 15 and m∢PRQ = 2y + 15, then the measure of angle PSQ equals 97.

The term "supplementary angles" means what exactly?

Supplementary angles are a pair of angles that always sum to 180 degrees. These two viewpoints are referred to as complements of one another. The English word "supplementary" is derived from the Latin words "Supplere" and "Plere," which respectively mean "supply" and "fill." As a result, the term "supplementary" designates something that is added to complete a task.

In this lesson, we will study about supplementary angles and how they can be applied to various geometry problems. As we explore supplementary angles, we'll discover how they differ from complementary angles.

We know that the measure of an angle is supplementary to its adjacent angle. That means that the measure of an angle and its adjacent angle add up to 180 degrees.

Given that m∢PSQ = 3y - 15 and m∢PRQ = 2y + 15, we can set up the equation:

m∢PSQ + m∢PRQ = 180

Plug in the values for the angles:

(3y - 15) + (2y + 15) = 180

Simplifying, we get:

5y = 180

Now we can find the value of y by dividing both sides by 5:

y = 36

Therefore, m∢PSQ = 3y - 15 = 3(36) - 15 = 97

So, the measure of angle PSQ is 97 degrees.

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Martin is building a fence around his rectangular garden. He has a 100 foot long roll of fencing he can use. The width of the garden is 10 feet

Answers

Answer:

Step-by-step explanation:

To find out how much of the 100 foot roll of fencing Martin will need to enclose the garden, you need to calculate the perimeter of the rectangular garden.

The perimeter is the total distance around the garden. To find the perimeter, you add up the lengths of all four sides of the rectangle.

The formula for the perimeter of a rectangle is: P = 2L + 2W

Where P is the perimeter, L is the length, and W is the width.

In this case:

P = 2 x 10 feet + 2 x 100 feet = 20 feet + 200 feet = 220 feet

Martin will need 220 feet of fencing to enclose his rectangular garden.

They want the cones to hold 28. 26 cubic

inches of popcorn. If the height is 19 inches, what is the radius?

Answers

If the radius of the base of the cone is 2 inches the height of the cone should be 2.1485 inches.

The volume of the cone is the capacity occupied by this. It is given by the formula,

The volume of the cone = [tex]\frac{1}{3} \pi r^{2} h[/tex]

r is the radius of the base, and h is the height of a cone.

Now, it is stated that cones hold 9 cubic inches of popcorn. Hence, the volume of a cone can be noted as,

The volume of the cone = [tex]\frac{1}{3} \pi r^{2} h[/tex]

[tex]9 * 3 = \pi r^{2} h[/tex]

[tex]\frac{9 *3}{\pi } = r^{2}h[/tex]

[tex]r^{2}h = 8.5943[/tex]

Now, let the radius of the cone be 2 inches, hence, the height of the cone is,

[tex]8.5943 = r^{2}h[/tex]

[tex]8.5943 = 2^{2}h[/tex]

h = 2.1485 in

Hence, if the radius of the base of the cone is 2 inches the height of the cone should be 2.1485 inches.

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The complete question is:

Noah and Lin are making paper cones to hold popcorn to hand out at parent math night. They want the cones to hold 9 cubic inches of popcorn. What are two different possible values for height h and radius r for the cones?

A local little league has a total of 70 players, of whom 80% are left-handed. How many left-handed players are there?

Answers

Answer:

56

Step-by-step explanation:

Take 70 and multiply 80%

70 × 80/100 = 56

Is 5 an acute angle?.

Answers

Answer:

Yes, an acute angle is an angle that measures less than 90 degrees.

Step-by-step explanation:

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