expand and simplify (x+3)(x-3)(3x+2)

Answer:

Step-by-step explanation:

A cone with a height of 9 in and a base diameter of 6 in has the volume 84.78 cubic inches.

The formula for the volume of a cone is:

V = (1/3)π[tex]r^{2}[/tex]h, where r is the radius of the base and h is the height.

In the question it is given height = 9 in and a base diameter = 6 in.

Radius = diameter/2

r = d/2 = 6/2 = 3 inches

Substituting the values in the formula:

V = (1/3)π[tex](3\ in)^2[/tex](9 in)

Simplifying the expression:

V ≈ 84.78 [tex]in^3[/tex]

Rounding to the nearest hundredth, we get:

V ≈ 84.78 [tex]in^3[/tex]

Therefore, the approximate volume of the cone is 84.78 cubic inches.

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18 pizzas were eaten at the party in total.

The term "total number" refers to the complete count or sum of a set of numbers or objects. It is the result of adding up all the individual numbers or objects in a set to get a final value that represents the entire set.

If each pizza was cut into 8 slices, then 2 and 1/2 pizzas is equivalent to 20 slices of pizza because:

2\frac{1}{2} \times 8 = 20

Since there were 7 groups of children, the total number of slices of pizza eaten at the party is:

20 slices/pizza x 7 groups = 140 slices

To convert this to the number of pizzas eaten, we divide the total number of slices by the number of slices per pizza:

140 slices ÷ 8 slices/pizza = 17.5 pizzas

Therefore, 17.5 pizzas were eaten at the party in total. However, since a pizza cannot be divided into fractions, we should round up to the nearest whole number, giving us a final answer of 18 pizzas.

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Six semicircles lie in the interior of a regular hexagon with a side length of 2 so that the diameters of the semicircles coincide with the sides of the hexagon. The zone of the shaded locale is around 10.3923 square units.

 We will approach this problem by first finding the region of the hexagon and after that subtracting the zones of the six semicircles from it. The zone of a customary hexagon with side length 2 can be found utilizing the equation:

Region of hexagon = (3√3/2) x side[tex]^{2}[/tex]

Substituting the given esteem of side length, we get:

Area of hexagon = (3√3/2) x 2[tex]^{2}[/tex] = 6√3

The range of a crescent is half the region of the comparing circle. So, the zone of each crescent is:

Range of semicircle = 1/2 x π x radius[tex]^{2}[/tex] = 1/2 x π x 1^[tex]^{2}[/tex]= π/2

There are six semicircles, so the whole range of the semicircles is:

Add up to the zone of semicircles = 6 x π/2 = 3π At long last, able to find the zone of the shaded locale by subtracting the region of the semicircles from the range of the hexagon:

Zone of shaded locale = Range of hexagon - Add up to a range of semicircles

= 6√3 - 3π

≈ 10.3923 thus, the zone of the shaded locale is around 10.3923 square units. 

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Answer:6

Step-by-step explanation:

As a result, for the two schools, the measures of variability are:

Mountain View School:

Range = 4, Variance = 9.1733, Standard deviation = 3.029

Bay Side School:

Range = 10, Variance = 7.84, Standard deviation = 2.8.

The degree of variance or dispersion in a set of data values is measured by standard deviation. The degree to which the data values deviate or vary from the mean or average value of the data set is indicated by this statistical indicator.

We must ascertain the range, variance, and standard deviation for each dataset in order to determine the measures of variability for the two schools.

Mountain View School:

Range: The smallest class size is 5 and the largest is 9, so the range is 9-5 = 4.

Variance: To calculate the variance, we need to find the mean first.

Mean = (5+6+8+9+8+2+0+10+2+4+5+6+8)/15

= 5.6

Then, we can find the variance using the formula:

Variance = Σ(xi - μ)²/n

= [(5-5.6)² + (6-5.6)² + (8-5.6)² + (9-5.6)² + (8-5.6)² + (2-5.6)² + (0-5.6)² + (10-5.6)² + (2-5.6)² + (4-5.6)² + (5-5.6)² + (6-5.6)² + (8-5.6)²]/15

= 9.1733

Standard deviation = √(9.1733) = 3.029

Bay Side School:

Range: The smallest class size is 0 and the largest is 10, so the range is 10-0 = 10.

Variance: To calculate the variance, we need to find the mean first.

So,

Mean will be = (8+7+6+5+5+4+4+3+1+0+2+0+0+2+3+5)/15

= 3.6

Then, we can find the variance using the following formula:

Variance = Σ(xi - μ)²/n

= [(8-3.6)² + (7-3.6)² + (6-3.6)² + (5-3.6)² + (5-3.6)² + (4-3.6)² + (4-3.6)² + (3-3.6)² + (1-3.6)² + (0-3.6)² + (2-3.6)² + (0-3.6)² + (0-3.6)² + (2-3.6)² + (3-3.6)² + (5-3.6)²]/15

= 7.84

Standard deviation will be = √(7.84)

= 2.8

As a result, for the two schools, the measures of variability are:

Mountain View School:

Range = 4, Variance = 9.1733, Standard deviation = 3.029

Bay Side School:

Range = 10, Variance = 7.84, Standard deviation = 2.8

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the width of the previous image is 9.5mm.

     The widthh can be defined as the horizontal measurement or distance measured from side to side.

       In geometry, the shorter side of an object is frequently referred to as its "width". For instance, both of the given rectangles are identical rectangles, but one of them has been rotated to demonstrate that the shorter side of the rectangle is referred to as its width.

In the given problem,

         if the width of the previous image is x,

                            4x=38

                        ⇒x=9.5mm

So, the width of previous image is 9.5mm.

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Step-by-step explanation:

f(x) = - 2 (x+1)^2 + 8     is already in vertex form

quadratic form can be found by expanding it :

f(x) = -2 ( x^2 + 2x +1)  + 8

f(x0 = -2x^2 -4x -2 + 8  

f(x) =  - 2x^2 - 4x + 6     <=====quadrtaic form

The value of one square in each sample is:

(a) 2

(b) 6

(c) 3

(d) 5

Let x represent the value one square. Thus, the value of one square in each sample can be determined as follow.

(a) 2x + 1 = 5        (Left side is equal to right side)

2x = 5 - 1

2x = 4

x = 4/2

x = 2

(b) 10 = x + 2 + 2

10 = x + 4

x = 10 - 4

x = 6

(c) 5 + 1 + x = 9

6 + x = 9

x = 9 - 6

x = 3

(d) 25 = 5x

x = 25/5

x = 5

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Katie's claim can be represented by the equation: a² ¢= 4(1/2ab) + b²

Katie's claim can be represented by the equation:

Outer square area = Sum of areas of four triangles + Inner square area or mathematically, a² = 4(1/2ab) + b²

where "a" and "b" are the lengths of the legs of the right triangle and "a²" represents the area of the outer square, while "b²" represents the area of the inner square.

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The length or value of d is 3m

What is meant by length?

Length is a measurement of how long something is, typically referring to the longest dimension of an object or space. It is a fundamental physical quantity and can be measured in various units, such as meters, feet, or inches. Length is important in many fields, including mathematics, science, and engineering.

According to the given information

In a right-angled triangle, the side opposite to the 90-degree angle is called the hypotenuse. The side opposite to the 60-degree angle is equal to the hypotenuse multiplied by the square root of 3 divided by 2. Since AC is the hypotenuse and its length is given as 2*(√(3))m, we can find the length of BC (d) as follows:

d = (AC * √(3)) / 2 d = (2 * √(3) * √(3)) / 2

d = 3m

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The area of the composite shape are

1. Orange

2. Light blue

3. Purple

4. Green

5. Red

6. Yellow

7. Light green

8. Yellow

9. Dark blue

10. Pink

The area of the composite shapes are solved as follows

1. rectangles

= 7 * 3 + (15 - 7) * 1.5

= 21 + 12

= 33 square cm

2.

= 39 x 4 + 0.5(39 + 26) x (18 - 4)

= 156 + 455

= 611 square m

3.

= 12 * 15 + 0.5 x 15 x 10

= 180 + 75

= 255 square ft

4.

= 15 x 7 + 0.5 x π x 3.5 x 3.5

= 105 + 19.24

= 124.2 square cm

5.

= 0.5 x 10 x 22 - 0.5 x 6 x 12

= 110 - 36

= 74 square yd

6.

= 0.5 x π x 3 x 3 + 0.5 x 6 x 11

= 14.14 + 33

= 47.1 square m

7.

= 18 x 6 - 2 x π x 2 x 2

= 108 - 25.13

= 82.8 square m

8.

= 4 x 16 + 0.5 (16 + 10) x (8 - 4)

= 64 + 52

= 116 square cm

9.

= 18 x 8 - 4 * 0.5 x 4 x 4

= 144 - 32

= 112 square cm

10.

= [0.5 (7 + (9 + 3)) x (15 + 6 - 17)] + [(17 - 6) x (9 + 3)] + [6 x 9]

= 38 + 132 + 54

= 224 square cm

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The bag contains 4.63 dollars.

To find :

Total amount of the coins bag contains.

Solution:

According to the given statement, a bag contains 50 coins.

Number of pennies = 16% of 50

                               = 0.16 × 50

                               = 8 pennies

Number of dimes  = 42% of 50

                            = 0.42 × 50

                             = 21 dimes

Number of nickels = 6 more than pennies

                              = 8 + 6

                             = 14 nickels

Number of quarters = Rest of the coins

                               = 50 - (8 + 21 + 14)

                               = 50 - 43

                              = 7 quarters

Since,

1 penny = 0.01 dollar

8 pennies = 0.01 × 8 = 0.08 dollar

1 dime = 0.10 dollar

21 dimes = 0.10 × 21 = 2.1 dollar

1 nickel = 0.05 dollar

14 nickel = 0.05 × 14 = 0.70 dollar

1 quarter = 0.25 dollar

7 quarter = 0.25 × 7 = 1.75 dollars

Total value of the coins in the bag = 0.08 + 2.10 + 0.70 + 1.75

                                                        = 4.63 dollars

Hence, The bag contains 4.63 dollars.

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The building is approximately 74.8 feet tall, and your head is approximately 117.7 feet away from the base of the building.

We can use trigonometry to solve this problem. Let's call the height of the building "h" and the distance from your head to the base of the building "d".

Using the tangent function;

tan(55°) = h/d

We know that h + 60 = d, so we can substitute h with d - 60:

tan(55°) = (d - 60)/d

Simplifying this equation, we get;

d = (h + 60)/tan(55°)

Substituting this value of d in first equation, we have;

tan(55°) = h/[(h + 60)/tan(55°)]

Simplifying this equation, we get;

h = 60 tan(55°)

Using a calculator, we find that h ≈ 74.8 feet.

Therefore, the building is approximately 74.8 feet tall.

To find the distance from your head to the base of the building, we can use the Pythagorean theorem;

d² = h² + 60²

Substituting h with 60 tan(55°), we get;

d² = (60 tan(55°)² + 60²

Using a calculator, we find that d ≈ 117.7 feet.

Therefore, your head is approximately 117.7 feet away from the base of the building.

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Answer:

x =  ± [tex]\frac{4}{3}[/tex]

Step-by-step explanation:

9x² − 16 = 0

9x² = 16

x² = [tex]\frac{16}{9}[/tex]

x = ± √[tex]\frac{16}{9}[/tex]

x =  ± [tex]\frac{4}{3}[/tex]

So, the answer is:  x = [tex]\frac{4}{3}[/tex] , - [tex]\frac{4}{3}[/tex]

The function f has only one critical value on the open interval (0,10), and the answer is (a) one.

To find the critical values of the function f(x) on the open interval (0,10), we need to find the values of x where f'(x) is equal to zero or undefined.

First, we need to find the values of x where f'(x) is undefined. Since f'(x) contains a term of x in the denominator, it will be undefined at x = 0. However, since the interval we are interested in is (0,10), we can exclude this value.

Next, we need to find the values of x where f'(x) is equal to zero. We can set the numerator of f'(x) equal to zero and solve for x

cos(x²) = 1/5

Taking the inverse cosine of both sides, we get

x² = arccos(1/5)

x = ±√(arccos(1/5))

However, since we are only interested in the interval (0,10), we can discard the negative root. Using a calculator, we can find that

√(arccos(1/5)) ≈ 2.6779

Therefore, the correct option is (a) one

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However, 2/7 is not equivalent to any fraction with denominator 6. Therefore, Maria's claim is incorrect.

A fraction is a way of representing a part of a whole or a ratio between two quantities. It consists of two numbers, the numerator (located above the fraction line) and the denominator (located below the fraction line), separated by a horizontal fraction bar. The numerator represents the number of parts of the whole or the ratio, while the denominator represents the total number of equal parts or the denominator of the ratio.

For example, the fraction 3/4 represents three out of four equal parts or three parts out of a total of four parts. It can also be interpreted as a ratio of three to four. Fractions can be simplified by dividing both the numerator and denominator by their greatest common factor. For instance, the fraction 6/8 can be simplified to 3/4 by dividing both the numerator and denominator by 2.

A counterexample to Maria's claim is the fraction 2/7.

To see this, note that 1/5 is equivalent to 14/70 and 1/7 is equivalent to 10/70. Therefore, any fraction between 1/5 and 1/7 can be expressed in the form n/70, where 10 < n < 14.

However, 2/7 is not equivalent to any fraction with denominator 6. Therefore, Maria's claim is incorrect.

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Answer:

40 beads

Step-by-step explanation:

First, let's find the length of string that the beads will be on.

The string is originally 20 cm, but 2 cm is taken off each side.

So, the string that the beads will be on is only 16 cm now.

Each bead is 4 mm wide, so we have to convert the bead width to centimeters.

4/10=0.4

So each bead is 0.4 cm.

Now to find how many beads will fit, we have to divide the length by the width of the bead.

16/0.4=40

So, Mona will need 40 beads.  Hope this helps ;)

Answer: No, it is not likely that 60% of Skyline College students say math is their favorite subject based on the given confidence interval of (0.6358, 0.7532).

The confidence interval tells us that we are 95% confident that the true proportion of Skyline College students who say math is their favorite subject lies between 0.6358 and 0.7532. This means that if we were to take many random samples from the population of Skyline College students and construct 95% confidence intervals for the proportion of students who say math is their favorite subject, 95% of those intervals would contain the true population proportion.

Since 0.60 is not within the interval (0.6358, 0.7532), it is unlikely that the true proportion of Skyline College students who say math is their favorite subject is 60%. However, we cannot make any definitive statements about the population proportion based on this one confidence interval alone.

Step-by-step explanation:

For a loan of $24,000 at 6% interest over 60 months, the monthly payment is $466.47.

A monthly payment is the sum of money that is made towards a debt or loan on a regular basis; it normally consists of both the main and interest. It is a set sum that the borrower must consistently pay until the debt is repaid in full. Mortgages, auto loans, student loans, and personal loans all frequently include monthly installments. The loan amount, the interest rate, and the term of the loan all affect how much will be paid each month.

We can use the following calculation to determine a loan's monthly payment:

M = P * (r * (1 + r)ⁿ) / ((1 + r)ⁿ⁻¹)

where:

M = payment each month

P = Principal (the loaned amount)

r = (Divide the annual interest rate by 12 to get the monthly interest rate)

n = total payments (12 divided by the number of years)

By entering the specified values, we obtain:

P = 24000

r = 6% / 12 = 0.005

n = 60

M = 24000 * (0.005 * (1 + 0.005)⁶⁰) / ((1 + 0.005)^60 - 1)

M = $466.47 (rounded to the nearest cent)

So, $466.47 is the monthly payment for a $24,000 loan with a 6% interest rate over 60 months.

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Ben's house will be worth $490,523.96 in 9 years if the value continues to increase at a rate of 7% per year.

We can use the formula for compound interest, which is:

A = P × (1 + r)ⁿ

Where:

A = final amount

P = principal (starting value)

r = annual interest rate (expressed as a decimal)

n = number of compounding periods

In this case, the principal is $281,320, the annual interest rate is 7% (or 0.07 as a decimal), and the number of compounding periods is 9 years. Plugging in these values, we get:

A = $281,320 × (1 + 0.07)⁹

A = $281,320 × 1.743

A = $490,523.96

Therefore, Ben's house will be worth approximately $490,523.96 in 9 years if the value continues to increase at a rate of 7% per year.

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Based on the information, we can infer that the most accurate method would be method 3 because it randomly selects the participants without any preference.

The most appropriate method for this survey would be method three (option D) because it will have a group of people who were chosen randomly. This means that people can have different ranges of age, gender, preferences, among others.

This is important because they will represent all the diversity of characteristics of the public, which will allow a study in this population to be more accurate.

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The area of the irregular polygon is equal to 30.5 square units.

In this problem we find the representation of an irregular pentagon, that is, a polygon of five sides of different length. Whose area can be found by adding the areas of rectangles and triangles:

Rectangle

A = b · h

Triangle

A = 0.5 · b · h

Where:

Now we proceed to determine the area of the irregular polygon:

A = 0.5 · 1 · 4 + 0.5 · 3 · 2 + 2 · 4 + 0.5 · 3 · 2 + 3 · 4 + 0.5 · 5 · 1

A = 2 + 3 + 8 + 3 + 12 + 2.5

A = 30.5

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Opposite rays can be defined as a figure formed by two collinear rays with a common endpoint, since the two rays lie on the same line.

The equation using the parent function y = √x that has a domain of 3≤x<∞ and a range of -2≤y<∞ is y = √(x - 3) - 2.

An equation is a mathematical statement that indicates the equality of two expressions. It typically contains variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division. Equations are used to solve problems in various fields of mathematics, science, engineering, and economics. They can be written in various forms, such as standard form, slope-intercept form, point-slope form, and more.

Here,

To shift the parent function y = √x to the right by 3 units and down by 2 units, we use the transformation:

y = √(x - 3) - 2

This equation has a domain of 3 ≤ x < ∞, since we subtract 3 from x inside the square root function. The range is -2 ≤ y < ∞, since we subtract 2 from the square root function.

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C) 36 yards   18*6=108

108ft to yards is 36

Answer:C

Step-by-step explanation:

Each jump rope is 6 feet long, so 18 jump ropes would require a total of:

18 x 6 = 108 feet of rope

Since there are 3 feet in a yard, we can convert 108 feet to yards by dividing by 3:

108 ÷ 3 = 36 yards

Therefore, the football coach should buy 36 yards of rope. The answer is (C).

Andrew has $28, and Matthew has 5 times that amount, or $140.

The term "amount" typically refers to a quantity or sum of something. It can refer to a physical quantity of something, such as the amount of water in a glass, or an abstract quantity, such as the amount of time it takes to complete a task.

Let x be the amount of money that Andrew has.

Then, the amount of money that Matthew has is 5 times x, which is 5x.

Together, they have a total of $168, so we can write an equation:

x + 5x = 168

Simplifying, we get:

6x = 168

Dividing both sides by 6, we get:

x = 28

Therefore, Andrew has $28, and Matthew has 5 times that amount, or $140.

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The expression (x^2 -3x+7) cannot be simplified further because there are no like terms to combine or any other operations to perform. It is already in its simplest form.

The expression (x^2 -3x+7) is a quadratic expression, meaning it has a degree of 2. It cannot be simplified further because there are no like terms to combine, which is the only operation that can be performed to simplify polynomials.

To understand this, let's look at the individual terms of the expression. The term x^2 is the highest degree term, which means it has the greatest power of x.

The term -3x is the linear term, which means it has a degree of 1. And the constant term is 7, which means it has a degree of 0.

Since the terms have different degrees and there are no like terms, there is no way to simplify the expression any further.

Therefore, (x^2 -3x+7) is already in its simplest form.

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