Pls help I’ll brainlest ASAP

\(t(n) = 2 {n}^{2} + 2n \)

_________________________________

\(t(1) = 2 ({1})^{2} + 2(1) \)

\(t(1) = 2 \times 1 + 2 \times 1\)

\(t(1) = 2 + 2 = 4\)

##############################

\(t(2) = 2 ({2})^{2} + 2(2) \)

\(t(2) = 2 \times 4 + 2 \times 2\)

\(t(2) = 8 + 4 = 12\)

##############################

\(t(3) = 2 ({3})^{2} + 2(3) \)

\(t(3) = 2 \times 9 + 2 \times 3\)

\(t(3) = 18 + 6 = 24\)

##############################

\(t(4) = 2 ({4})^{2} + 2(4)\)

\(t(4) = 2 \times 16 + 2 \times 4\)

\(t(4) = 32 + 8 = 40\)

##############################

\(t(5) = 2 ({5})^{2} + 2(5) \)

\(t(5) = 2 \times 25 + 2 \times 5\)

\(t(5) = 50 + 10\)

\(t(5) = 60\)

_________________________________

And we're done.

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Answer:

36°

Step-by-step explanation:

all the interior angles of a triangle add up to 180°

78 + 66 = 144

180 - 144 = 36°

Answer:

The amount of air needed to blow up the giant beach ball with a diameter of 6 feet is approximately 113.1 cubic feet.

When we want to blow up a beach ball, we need to add air to it until it expands and reaches its full size. The amount of air we need to add depends on the size of the beach ball, and in this case, we are given the diameter of the ball.

To calculate the amount of air we need, we first need to find the volume of the beach ball. The volume of a sphere, which is the shape of the beach ball, is given by the formula:

V = \((4/3) * \pi * r^3\)

where V is the volume, pi is the mathematical constant, around 3.14, and r is the sphere's radius.

We are given the diameter of the beach ball, which is 6 feet. The radius is half of the diameter, or 3 feet. This value can be used to simplify the formula by substituting it in:

V = \((4/3) * \pi * 3^3\)

V = \((4/3) * \pi * 27\)

V = 113.1 cubic feet (rounded to one decimal place)

So the volume of the beach ball is approximately 113.1 cubic feet. This means that we need to add 113.1 cubic feet of air to the beach ball to fully inflate it.

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Answer:

I think it would be about 4 2/5

The tuxedo was rented for 4 days.

Let's start by assigning variables to the unknowns. Let "x" be the number of additional days rented, and "d" be the total number of days rented (including the first day).

From the given information, we know that the flat fee for the rental is $150, so the cost of the additional days is the total cost minus the flat fee, which is $300 - $150 = $150. We also know that the cost for each additional day is $50. Therefore, we can set up the equation:

$150 + $50x = $300

Subtracting $150 from both sides, we get:

$50x = $150

Dividing both sides by $50, we get:

x = 3

So the tuxedo was rented for 3 additional days, making the total number of days rented:

d = 1 + 3 = 4

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Answer:

5/12

Step-by-step explanation:

So, first you do 2/12 - 1/2. Answer will be 5/12

Hope this helps you. :)

The answer is 2.52

I hope this helps you!

Answer:

Step-by-step explanation:

3.12 - 0.6 = 2.52

The answer to the equation −0.22x + x − 0.33x is 0.11x.

The answer is 0.11x. To solve this, we can start by rearranging the terms of the equation. The equation can be written as:

−0.22x + x − 0.33x = −0.22 + 0.33x

We then subtract x from both sides of the equation, resulting in:

−0.22x − x = −0.22 + 0.33x − x

We then combine like terms on the left side of the equation, resulting in:

−1.22x = −0.55

Finally, we divide both sides of the equation by -1.22 to solve for x, resulting in:

x = 0.11

Therefore, the answer is 0.11x.

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Complete question

What is the value of -0.22+−0.33−0.22x+x−0.33x?

a.) The value of pulses exported by US in billion would be=30 billion.

b.) The ratio of wheat export of UK to maize export of IND would be= 6:5

For question a.)

To calculate the pulses, the following steps should be taken as follows:

From the bar chart, the value of pulses in billions = 30 billions.

For question b.)

The ratio of wheat export at UK and maize export at IND would be calculated as follows:

The quantity of wheat export at UK = 24

The quantity of maize export at IND = 20

Therefore, the ratio of wheat to maize = 24:20= 6:5

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Answer:

it'd be (0, 5) it sits on the y line so it's the only y intercept

Answer:

y=-3x+5

Step-by-step explanation:

It start from its starts from 5 on the y axis, and goes down by 3 so its negitive. So y=-3x+5

Answer:

x intercept: (-8,0)

y intercept: (0,2)

Using trigonometric ratio and angle of elevation, the value of x and y are 128.7ft and 176ft respectively.

The angle of elevation is an angle that is formed between the horizontal line and the line of sight. If the line of sight is upward from the horizontal line, then the angle formed is an angle of elevation.

In the given problem, we can use the concept of trigonometric ratios to find the value of x and y.

Since we have the value of adjacent and the angle, we can use either tangent of the angle to find x or cosine of the angle to find y.

tan 47 = opposite / adjacent

tan 47 = x / 120

x = 120 tan 47

x = 128.7ft

Using cosine of the angle;

cos 47 = adjacent / hypothenuse

cos 47 = 120 / y

y = 120 / cos 47

y = 176ft

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Answer:

16,17,18

your welcome

Answer:

Step-by-step explanation:

It is a square so every angle is 90°. As diagonal bisects, the angles of square means that 90/2=45 So,

6x-21=45

6x=66

x=11°

Note: Diagonal only bisects the angle in the square, not in every figure.

Combinations have allowed us to determine that there are 38760 different groups of six children that you can drive.

A combination in mathematics is a choice made from a group of separate elements where the order of the selection is irrelevant.

The number of permutations/k! is the formula for computing the number of combinations. n!/(n-k) is the number of permutations!

Hence, the number of combinations is (n!/(n-k)!)/k!

So, there are 20 children in total.

There are 6 students who can fit in the van.

The maximum number of 6-child groups that the van can accommodate.

²⁰C₆

n! = n(n-1)(n-2)(n-3).......1

= (20 x 19 x 18 x 17 x 16 x 15) / (6 x 5 x 4 x 3 x 2)

= 4 x 19 x 2 x 17 x 15

= 38760

Therefore, combinations have allowed us to determine that there are 38760 different groups of six children that you can drive.

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Complete question:

You volunteer to help drive children at a charity event to the zoo. But you can fit only 6 of 20 children present in your van. How many different groups of 6 children can you drive?

Answer:

what do you mean by land ?

The intensity of sound is proportional to the square of its amplitude.

Thus, if I9 and I8 are the intensities of sounds at 9 decibels and 8 decibels respectively, then:

I9/I8 = (10^(9/10))/(10^(8/10))

I9/I8 = 10^(0.1)

I9/I8 = 1.2589

Therefore, the relative intensity of 9 decibels is approximately 1.26 times higher than that of 8 decibels.

May I please have a Brainliest? I put a lot of thought and effort into my answers, so I would really appreciate it!

Answer:

81x² + 90x + 48y + 64

Step-by-step explanation:

(9x+8)² = (9x+8)(9x+8) = 9x*9x + 9x*8 + 8*9x + 8*8 = 81x² + 72x + 72x + 64

             = 81x² + 144x + 64

then:

(9x+8)² -54x+48y = (81x² + 144x + 64) -54x + 48y = 81x² + 90x + 48y + 64

Answer:

x = 10

Step-by-step explanation:

to find the measure of angles we first need to find the value of x

The sum of interior angles in a triangle is equal to 180

9x + 7x + 2x = 180 add like terms

18x = 180 divide both sides by 18

x = 10 to find angle measures replace x with 10 in each representative like:

m<L = 9x and 9*10 = 90 and so on

A. The system of equations in standard form is: 4x + 5y = 540 and 3x + 5y = 440.

B. The y-intercept of the equation representing the prices on Saturday night is 108, and the y-intercept of the equation representing the prices at the matinee on the second day is 88.

A) Let's define the variables:

Let x represent the number of children attending.

Let y represent the number of adults attending.

On Saturday night:

The equation for the revenue generated on Saturday night is:

4x + 5y = 540 (since children's tickets cost $4 and adults' tickets cost $5, and the total revenue is $540).

Matinee on the second day:

The equation for the revenue generated at the matinee is:

3x + 5y = 440 (since children's tickets cost $3 and adults' tickets still cost $5, and the total revenue is $440).

Therefore, the system of equations in standard form is:

4x + 5y = 540

3x + 5y = 440

B) Let's rewrite the system of equations in slope-intercept form:

On Saturday night:

4x + 5y = 540

Rearranging the equation, we get:

5y = -4x + 540

Dividing both sides by 5, we get:

y = (-4/5)x + 108

The y-intercept of this equation is 108.

Matinee on the second day:

3x + 5y = 440

Rearranging the equation, we get:

5y = -3x + 440

Dividing both sides by 5, we get:

y = (-3/5)x + 88

The y-intercept of this equation is 88.

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The equation of the line would be y = (4/5)x + 4 which in slope-intercept form represents the graph.

The graph is given in the question.

As per the given line, we take two points (0, 4) and (5, 8)

Let the required line would be y - y₁ = (y₂ - y₁)/(x₂ -x₁ )[x -x₁]

x₁ = 0, y₁ = 4

x₂ = 5, y₂ = 8

⇒ y - y₁ = (y₂ - y₁)/(x₂ -x₁ )[x -x₁]

Substitute values in the equation, we get

⇒ y - 4 = (8 - 4)/(5-0 )[x -0]

⇒ y - 4 = (4/5)x

⇒ y = (4/5)x + 4

The given equation of the line y = 4x + 5 is incorrect because its slope is not correct.

So, the equation of the line would be y = (4/5)x + 4.

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Answer:

x-2y= 8 = 0 and 3x-6y= 6  = y= - 1/3 In Alternative Form y= -0.3. , y= -3 -1

Step-by-step explanation:

1. The volume of the pyramid is 320ft³

3. The volume of the pyramid is 2395.83cm³

5. The volume of the pyramid is 1200in³

The volume of a rectangular pyramid can be calculated using the formula:

V = (1/3) * base area * height

Where:

1. The volume of the pyramid is calculated as;

V = 1/3 * 8 * 12 * 10 = 320ft³

3. The volume of the pyramid is;

V = 1/3 * (25 * 12.5) * 23 = 2395.83cm³

5. The volume of the pyramid is;

V = 1/3 * (15 * 15) * 16 = 1200in³

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The amount remaining after 50 years is approximately 45.5% of the Initial amount, A₀.

The given exponential function represents the amount A(t) (in grams) of cesium-137 remaining after t years:

A(t) = A₀ * (1/2)^(t/30)

We are asked to find the initial amount A₀ and the amount remaining after 50 years.

1. Initial amount:

The initial amount, A₀, is the amount of cesium-137 present at t = 0 years. To find A₀, we substitute t = 0 into the equation:

A(0) = A₀ * (1/2)^(0/30)

A(0) = A₀ * 1

Since anything raised to the power of zero is 1, we have A(0) = A₀ * 1, which simplifies to A(0) = A₀.

Therefore, the initial amount of the sample is A₀.

2. Amount after 50 years:

To find the amount remaining after 50 years, we substitute t = 50 into the equation:

A(50) = A₀ * (1/2)^(50/30)

Now we can calculate the amount using the given formula:

A(50) = A₀ * (1/2)^(5/3)

To round the answer to the nearest gram, we evaluate the expression and round the result to the nearest gram:

A(50) = A₀ * 0.455

A(50) ≈ A₀ * 0.455

Therefore, the amount remaining after 50 years is approximately 45.5% of the initial amount, A₀.

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Ciana should purchase the skirt at the store across town because the total economic cost will be lowest.

Ciana makes $30 per hour at her work, and her purchase decision includes the opportunity cost of lost wages:

Total economic cost:

Local store = $114 + [1/4 hours x 2 (round trip) x $30] + (1/2 hours x $30 spent shopping) = $144

Across town = $86 + [1/2 hours x 2 (round trip) x $30] + (1/2 hours x $30 spent shopping) = $131

Neighboring city = $60 + [1 hour x 2 (round trip) x $30] + (1/2 hours x $30 spent shopping) = $135

Ciana should buy a skirt at the store across town. Because it has the lowest total economic cost ($131).

Opportunity cost is the lost benefit or additional cost of choosing one activity or investment over another. Economic costs include both accounting costs and opportunity costs.  

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Answer:

14cm

Step-by-step explanation:

Algebra is the way!

But seriously, let's model this algebraically.

We know the that the area of a triangle is represented by:

\(A = \frac{1}{2} base*height\)

we'll use b and h to represent base and height

\(A = \frac{1}{2} b*h\)

Okay, so you are given the area of the triangle already. It is \(35 cm^2\). SO you have:

\(35 = \frac{1}{2} bh\)

Now here's the tricky bit of the question. You have 2 unknown variables, oh no! How will you solve? The key to this is simple, in a case where you have 2 or more unknown variables, ALWAYS think to yourself, "can I represent this variable in terms of another"?

In this case you can. They tell you what the height of the triangle is, in terms of the length of the base. They tell you, height is 4 cm more than 2 times the base.

So replace h in this equation with 2b + 4.

\(35 = \frac{1}{2} (b)(2b+4)\\\\35 = \frac{1}{2}(2b^2 + 4b)\\ 70 = 2b^2 + 4b\\0 = 2b^2 + 4b - 70\\0 = (2)(b^2 + 2b - 35)\\0 = (b +7)(b - 5)\\\\b = 5\\b\ \neq -7\)

Okay, so you know the base of the triangle is 5 cm. The question asks for height, so what you're going to do is refer back to what h is.

We found that \(h = 2b + 4\)

sub in 5 into that:

\(h = 2(5) + 4 = 14\)

Therefore the height of the triangle is 14cm.

Answer:

Step-by-step explanation:

Givens

Area = 1/2 B* H

B = B

H = 2*B + 4

Area = 35

Solution

35 = 1/2 * B * (2B + 4)                          Multiply both sides by 2

35*2 = 2*(1/2) * B * (2B + 4)                 Combine

70 = B(2B + 4)                                      Remove the Brackets.

70 = 2B^2 + 4B                                    Subtract 70 from both sides.

2B^2 + 4B - 70 = 0                               Divide everything by 2

B^2 + 2B - 35 = 0                                 Factor

(B + 7)(B - 5)

B+7 = 0 will give a minus number. Geometry does not allow minus numbers.

B - 5  = 0

B = 5

But what you want is the height.

h = 2b + 4

h = 2*5 + 4

Answer: h = 14

We can say that the domain of f(x) is (-∞, ∞), which means that any real number can be plugged into the function and it will produce a valid output.

What is function?

In mathematics, a function is a relationship between two sets of elements, called the domain and the range, such that each element in the domain is associated with a unique element in the range.

The function f(x) = -x³ + 6x² -10x + 4 is a polynomial function, which means that it is defined for all real values of x. Unlike some functions (such as square roots or logarithms) which have restrictions on their input values, a polynomial function can take any real number as an input.

To express the domain of the function in interval notation, we use the notation (-∞, ∞), which represents all real numbers. The symbol ∞ stands for infinity, and the open interval notation with the parentheses indicates that there are no specific endpoints for the domain; it extends indefinitely in both directions along the real number line.

Therefore, we can say that the domain of f(x) is (-∞, ∞), which means that any real number can be plugged into the function and it will produce a valid output.

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Answer:

An employee's score in order to qualify for increase in the salary must be higher than 95.45.

Step-by-step explanation:

Let X represent the performance score of employees.

It is provided that X follows a normal distribution with parameters μ = 82.5 and σ - 9.25.

It is provided that the office will increase salary of its top 8% employees on the basis of a performance score the office created for each employee.

That is, the probability to qualify for increase in the salary is,

P (X > x) = 0.08

⇒ P (X < x) = 0.92

⇒ P (Z < z) = 0.92

The corresponding z-value is,

z = 1.40

Compute the value of x as follows:

\(z=\frac{x-\mu}{\sigma}\\\\1.40=\frac{x-82.5}{9.25}\\\\x=82.5+(1.40\times 9.25)\\\\x=95.45\)

Thus, an employee's score in order to qualify for increase in the salary must be higher than 95.45.

Answer:

the answer is -23 let me if you have questions

Here you go.

The answer is A
II Only