Guys please help

Find the intersection of y = 2(x+2) and y = 4(x-4).

The circumference of the circle is 2π x 2, or 12.57 units.

To find the circumference of a circle, we use the formula C = 2πr, where C is the circumference, π is a constant value of 3.14, and r is the radius of the circle. In this case, the radius of the circle is 2 units. So, we plug the values into the formula and get 2π x 2 = 12.57 units. This means that the circumference of the circle is 12.57 units. To put it another way, the circumference is equal to the diameter of the circle (2 units) multiplied by the value of pi (3.14). Therefore, the circumference of a circle with a radius of 2 units is 12.57 units.

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The number of ways to select 9 players for the starting lineup from a team of 15 players  is 4862 ways.

The number of ways to select 9 players for the starting lineup from a team of 15 players can be calculated using the formula for combinations, which is given by:

C(n,k) = n! / (k! (n-k)!)

Where n is the total number of items, k is the number of items being selected, ! means factorial, and C(n,k) represents the number of combinations of k items from n.

Using this formula, the number of ways to select 9 players from a team of 15 players is:

C(15,9) = 15! / (9! (15-9)!) = 15! / (9! 6!) = 4,862

So, there are 4,862 ways to select 9 players for the starting lineup from a team of 15 players.

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Answer:

x = 14

Step-by-step explanation:

[tex]8^{x-4}[/tex] = 8^10

[tex]8^{14 - 4}[/tex] = 8^10

8^10 = 8^10

The total surface area of the pyramid is 100 + 4 x 50 = 100 + 200 = 300 square inches.

A square pyramid's surface area is calculated by summing the areas of its four lateral sides and base.

Since each side of the base of the pyramid measures 10 inches, the base has an area of 10 x 10 = 100 square inches.

Due to the fact that each lateral face is a triangle with a base of 10 inches and a height of 10 inches each, they each have an area of (1/2) x 10 x 10 = 50 square inches.

Therefore, the total surface area of the pyramid is 100 + 4 x 50 = 100 + 200 = 300 square inches.

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Option C) is the correct graph that best represents the combination of both functions.

The graph, which plots time on the x-axis and temperature on the y-axis, displays an increasing function that depicts the temperature. The graph is divided into two sections: one shows a straight line with a positive slope to reflect the heater's contribution, and the other shows a curve to show the sun's contribution.

Option A) depicts a straight line that illustrates the rise in temperature brought on by the heater, but it omits the sun's influence. The intersection of these two functions is not depicted in this graph.

Option B) displays a curve that depicts the rise in temperature brought on by the sun, but it omits the impact of the heater. The intersection of these two functions is not depicted in this graph.

The sum of the two functions h(t) and s(t), which model the rise in pool temperature, can be written as follows:

c(t) = h(t) + s (t)

The specific functions h(t) and s(t) and their values at various times t would affect the graph of c(t).

Both the function h(t) and the function s(t) model the rise in temperature brought on by the sun and the heater, respectively.

As a result, Option C) is the correct graph that accurately depicts the union of the two functions.

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Answer:

Its A.

Step-by-step explanation:

it just looks like a combination of the other 2

The two equations can be rearranged to get two equations with one variable on each side. The equations become 4a = -9 - 3b and 2a = -1 - 5b. By dividing both sides of the first equation by 4, the equation becomes a = -2.25 - 0.75b. Substituting this value of a into the second equation gives -4.5 - 3.75b = -1. Solving this equation for b gives b = 1.2.

4a + 3b = -9

2a + 5b = -1

4a = -9 - 3b

2a = -1 - 5b

a = -2.25 - 0.75b

-4.5 - 3.75b = -1

b = 1.2

a = -2.25 - 0.75(1.2)

a = -1.95

The given set of equations is a simultaneous equation. This means that both equations have the same two variables, a and b. To solve for a and b, we must rearrange the equations so that each equation has only one variable on one side. We can do this by subtracting 3b from the first equation and 5b from the second equation. This gives us the equation 4a = -9 - 3b and 2a = -1 - 5b.

Next, we divide both sides of the first equation by 4 to get a = -2.25 - 0.75b. We can then substitute this into the second equation to get -4.5 - 3.75b = -1. Solving this equation for b gives us b = 1.2. Finally, we can substitute this value of b back into the first equation to get a = -1.95. This means that the solutions for a and b are a = -1.95 and b = 1.2.

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Answer:

C. 4

Step-by-step explanation:

The initial value would be four because that's what the value is at the start of the graph.

The length of sides BC and XC in the triangle are 8.66 and 10 units respectively

An equation is an expression that contains numbers and variables linked together by mathematical operations of addition, subtraction, multiplication, division and exponents. An equation can either  be linear, quadratic, cubic, depending of the degree of the variable.

Trigonometric ratio is used to show the relationship between the sides and angles of a right triangle.

From the triangle shown, using trigonometric ratio:

sin(30) = 5/XC

XC = 10

Also:

tan(30) = 5/BC

BC = 8.66

The length of BC and XC are 8.66 and 10 units respectively

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The exponential function shown in the graph is f(x) = 2ˣ

An equation is an expression that contains numbers and variables linked together by mathematical operations of addition, subtraction, multiplication, division and exponents. An equation can either  be linear, quadratic, cubic, depending of the degree of the variable.

The standard form of an exponential function is:

y = abˣ

where a is the initial value and b is the multiplication factor.

The graph shown is an exponential function.

At the point (0, 1):

y = abˣ

substituting:

1 = ab⁰

a = 1

At the point (2, 4):

y = abˣ

substituting x = 2, y = 4 and a = 1:

4 = b²

b = 2

The exponential function is y = 2ˣ

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the total cost of fencing the garden will be Rs5400.

What is square?

Having four equal sides, a square is a quadrilateral. There are numerous square-shaped objects in our immediate environment. Each square form may be recognised by its equal sides and 90° inner angles. A square is a closed form with four equal sides and interior angles that are both 90 degrees. Numerous different qualities can be found in a square.

area of the garden = 4a  ( a = side )

= 4(18)

= 72m

length of wire required to fence three rounds = 3 × perimeter

= 3 × 72

= 216 m

rate = 25 × 216

= 5400

Hence the total cost of fencing the garden will be Rs5400.

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The cost of each apple is $0.56 while the cost of each banana is $0.8

An equation is an expression that shows the relationship between two or more numbers and variables using mathematical operations. An equation can be linear, quadratic, cubic and so on, depending on the degree of the variable.

Let a represent the cost of each apples and b represent the cost of each bananas. Four apples and three bananas cost £4.48:

4a + 3b = 4.48      (1)

Also, three apples and four bananas cost £4.76, hence:

3a + 4b = 4.76    (2)

Solving both equations simultaneously gives:

a = 0.56, b = 0.8

The cost of apple is $0.56 while the cost of banana is $0.8

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Answer:

Let's call the travel fee "t" and the hourly fee "h". Then the total cost of a repair, y, can be represented as:

y = t + hx

We can use the two given pieces of information to write two equations and solve for t and h:

2h + t = 100

6h + t = 260

Subtracting the first equation from the second, we get:

4h = 160

Dividing both sides by 4, we get:

h = 40

Substituting this value of h back into the first equation, we get:

2h + t = 100

2(40) + t = 100

80 + t = 100

Subtracting 80 from both sides, we get:

t = 20

So the total cost of a repair, y, as a function of the number of hours spent fixing a leak, x, can be represented as:

y = 20 + 40x

Step-by-step explanation:

Answer:y=40x+20

Step-by-step explanation:

The true statement is that the radius is 10

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

A circle has a diameter of 20

This means that

Diameter = 20

Divide both sides by 2 to determine the radius

So, we have

Radius = 10

This means that the true statement is that the radius is 10

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Eliza is 212 feet above the ground as the given sector area of the half of the wheel is 5618 pi ft^2 and ride is stuck at 180 degrees.

Ferris wheel has a shape of a circle

So, we can use this formula

Area = πr²

Sector area of half the circle = πr²/2

From Eliza to the ground is the diameter of the wheel

5618 π ft² = πr²/2

r² = √2×5618ft²

r = 106 feet

The diameter of the wheel is twice the radius

= 2 × 106 feet = 212 feet

Therefore, Eliza is 212 feet above the ground.

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g⁻¹(x) = ∛(x²/2 + 3)  is the inverse of  the function g(x)= √(2x³-6)

In mathematics, the inverse function of a function g (also called the inverse of g) is a function that undoes the operation of g.

g(x)= √(2x³-6)

Let g(x) = y

So we can say y = √(2x³-6)

We will then make x the subject:

y = √(2x³-6)

y² = 2x³-6

y² + 6 = 2x³

2x³ = y² + 6

x³ = y²/2 + 6/2

x³ = y²/2 + 3

x = ∛(y²/2 + 3)

since x = g⁻¹(y)  = ∛(y²/2 + 3)

Thus, g⁻¹(x) = ∛(x²/2 + 3)      (Replace y with x)

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Answer:

The common difference is 2.

Answer: X= 5 ;  -11

To solve our problem lets work backwards.

x^2-6x=55. First we must subtract 55 from both sides our equation. That leaves us with x^2-6x-55=0.  

We next need to cancel out the number six. We also need to find two numbers that can be multiplied by one another to equal 55.

This would be 5 and -11. 5 and -11 can be added together to make -6, which is the negative integer for 6. They can also be multiplied together to make the negative integer of 55, which is -55.

This means that our X has two possible solutions.

Hence, X= 5 & -11

I hope this helps & Good Luck <3 !

The value of a car that depreciates over time can be modeled by the function [tex]J(t)=27000(0.9)^{2t+2}[/tex] has an equivalent form of [tex]J(t) = 21870(0.81)^t[/tex].

A relation between a collection of inputs and outputs is known as a function. A function is, to put it simply, a relationship between inputs in which each input is connected to precisely one output. Each function has a range, codomain, and domain. The usual way to refer to a function is as f(x), where x is the input. A function is typically represented as y = f. (x).

The value of the car is given as:

[tex]J(t)=27000(0.9)^{2t+2}[/tex]

The equation can be written as:

[tex]J(t)=27000(0.9)^{2t} (0.9)^2\\\\J(t) = 27000(0.81)^t(0.81)\\\\J(t) = 21870(0.81)^t[/tex]

Hence, the value of a car that depreciates over time can be modeled by the function [tex]J(t)=27000(0.9)^{2t+2}[/tex] has an equivalent form of [tex]J(t) = 21870(0.81)^t[/tex].

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The figure's area and perimeter are 562.08 m² and 123.68 m, respectively.

The figure in question is composed of a parallelogram and a crescent. The area of the parallelogram may be calculated using the equation base x level, yielding a value of 336 m².

The area of the crescent is calculated using the formula (π x r²)/2, yielding a value of 226.08 m². As a result, the total area of the figure is 562.08 m².

The parallelogram's perimeter is 86 m, while the boundary of the half circle is 37.68 m, for a total perimeter of 123.68 m.

The figure has a surface area of 562.08 m² and a perimeter of 123.68 m.

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Answer: 2 c squared d + d c + 6 c squared d squared

Step-by-step explanation:   I looked it up

The loss percentage on selling an article is, 75%.

A number or ratio that can be expressed as a fraction of 100 or a relative value indicating hundredth part of any quantity is called percentage.

Given that;

The loss made on selling an article is 25% of the cost price.

Let the cost price = 100

Hence, Selling price is,

⇒ 25% of cost price

⇒ 25% of 100

⇒ 25

Thus, The loss is,

⇒ Loss = cost price - selling price / cost price × 100

           = (100 - 25) / 100 × 100

          = 75%

Thus, The loss percentage on selling an article is, 75%.

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The exponential model is [tex]T(t)=69+(111)e^-^1^3^6^8^3^5^7^0^2^1^t[/tex] and It takes the cake 9.32 minutes to cool to the desired​ temperature

We can solve this by using Newton's Law of cooling,

[tex]T(t)=C+(T_o-C)e^k^t[/tex]

where

T(t) is the temperature at any given time

C is the surrounding temperature

T₀ is the initial temperature

k is a negative constant

t is the time

A cake recipe is baked until the center is 180 °F

T₀=180 ⇒ initial temperature

The room temperature is 69 °F

C = 69 ⇒ surrounding temperature

By using the table, substitute t and T to find the constant k

At t = 5 minutes, T = 125 °F

[tex]125=69+(180-69)e^k^t[/tex]

By subtracting 69 on both sides

[tex]56=(111)e^k^t[/tex]

Dividing both sides by 111

[tex]\frac{56}{111} =e^k^t[/tex]

Add ㏑ for both sides

[tex]ln(\frac{56}{111} )=ln(e^k^t)[/tex]

Dividing both sides by 5

k=- 0.1368357021

The exponential model is  [tex]T(t)=69+(111)e^-^1^3^6^8^3^5^7^0^2^1^t[/tex]

The cake cools at 100 °F and the desired​ temperature is 100°

T(t) = 100 ⇒ cake's temperature at t minute

Using the model above to find t

[tex]T(t)=69+(111)e^-^1^3^6^8^3^5^7^0^2^1^t\\\\100=69+(111)e^-^1^3^6^8^3^5^7^0^2^1^t[/tex]

Subtract 69 from both sides

[tex]39=(111)e^-^1^3^6^8^3^5^7^0^2^1^t[/tex]

Divide both sides by 111

[tex]\frac{39}{111} =e^-^1^3^6^8^3^5^7^0^2^1^t[/tex]

Applying ㏑ for both sides

[tex]ln(\frac{39}{111}) =e^-^1^3^6^8^3^5^7^0^2^1^t[/tex]

Dividing both sides by - 0.136835702

t=9.321711938

t ≅ 9.32 minutes

It takes the cake 9.32 minutes to cool to the desired​ temperature.

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Answer:

23

Step-by-step explanation:

so the sum of all side's of a triangle is 180

so if one angle is 62 n the other angle is 95 then to find the third angle you need to

[tex]62 + 95 + x = 180[/tex]

[tex]157 + x = 180[/tex]

[tex]x = 180 - 157[/tex]

[tex]x = 23[/tex]

hope it helps mate

have a nice day :?

Alex will take 3.75 gallons of fuel to drive five hours to visit his family in city B.

First, let's convert the rate of 60 kilometers per hour to miles per hour:

60 kilometers per hour * (1 mile / 1.6 kilometers) = 37.5 miles per hour

Next, we'll use the rate to find out how many miles Alex will drive in 5 hours:

37.5 miles per hour * 5 hours = 187.5 miles

Now that we know the total distance Alex will drive, we can use the information about the fuel consumption (2 gallons every 50 miles) to calculate the number of gallons of fuel he will need:

187.5 miles / 50 miles per 2 gallons = 3.75 gallons

So, Alex will need 3.75 gallons of fuel to drive five hours to visit his family in city B.

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The two equations form a system of linear equations that has no solution are

y=3x+2

y=3x+(1/2)

What is the solution to an equation?

In order to make the equation's equality true, the unknown variables must be given values as a solution. In other words, the definition of a solution is a value or set of values (one for each unknown) that, when used as a replacement for the unknowns, transforms the equation into equality.

y=3x+2

y=3x+(1/2)

Equate both the equations to find x

3x+2 =3x+(1/2)

same term 3x cancels out

2=(1/2)

This is not true

So, two equations form a system of linear equations that has no solution are

y=3x+2

y=3x+(1/2)

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Step-by-step explanation:

The expression can be simplified as follows:

-12 + |-3| - |-14| = -12 + 3 - 14 = -23

So, the answer is -23.

Answer: -23

Step-by-step explanation: The absolute value symbols turn the numbers inside to positive. The subtraction symbols outside dont change. When doing this conversion the simplified version will be -12+3-14 which equals -23.

Answer:

So the expression is equivalent to 18x + 15.

Step-by-step explanation:

The expression 5(4x+3)-2x simplifies to:

= 20x + 15 - 2x (distributing the 5)

= 18x + 15 (combining like terms)

So the expression is equivalent to 18x + 15.

a. Adding the same number to two numbers produces the same result. Example: 4 + 3 = 7, 7 + 3 = 10, b. Commutative Property: Order does not matter. Example: 4 + 7 = 7 + 4.

The Density Property of Real Numbers states that between any two real numbers, there are an infinite number of other real numbers. This means that for any two real numbers, no matter how close or far apart they are, there is always a third number between them. An example of this property would be if we have two numbers, 4 and 7. If we add 3 to each of these numbers, we will get the same result. 4 + 3 = 7, and 7 + 3 = 10. This shows that no matter what two real numbers we pick, there will always be a third number between them, and when we add the same number to both of them, we will get the same result. Another property of numbers is the Commutative Property, which states that the order of the numbers doesn’t matter when performing certain operations. For example, when adding two numbers, 4 + 7 = 7 + 4. This means that it doesn’t matter which number comes first when adding. This property applies to other operations as well, such as multiplication, division, and subtraction.

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After 10 years at 9% compound interest per annum, The amount will be £393.57.

The amount of money you will have after 10 years can be calculated using the formula for compound interest:

[tex]A = P * (1 + r/n)^{nt}[/tex]

where:

A is the final amount,

P is the initial amount (principal),

r is the interest rate as a decimal,

n is the number of times the interest is compounded per year,

t is the number of years the money is invested.

In this case:

P = £200

r = 9% = 0.09

n = 1 (because interest is compounded annually)

t = 10

So, plugging in the values, we get:

[tex]A = 200 * (1 + 0.09/1)^{1 * 10)} = 200 * (1.09)^{10}[/tex]

[tex]A = 200 * 1.96787 = 393.57[/tex]

So, after 10 years at 9% compound interest per annum, you will have £393.57.

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Step-by-step explanation:

the slope is always the factor of x and the ratio

y coordinates difference / x coordinates difference

when going from one point on the line to another.

in short : y/x

the perpendicular slope is -x/y.

the ratio is turned upside down, and the sign is flipped.

so, the begin of our equation is

y = (1/3)x + b

b (the y-intercept, which is the y-value when x = 0) we get by using the given point and is coordinates:

-7 = (1/3)×6 + b = 2 + b

b = -9

so, the whole equation is

y = (1/3)x - 9