Solve this system of equations by elimination:

8x+9y=48
12x+5y=21

The center of the circle is (-1.5, -2) and the radius is 3.205.

To find the center and radius of the circle, we can use the formula for the distance between two points in a coordinate plane. The two points given are (-3, -4) and the origin (0, 0), which represents the diameter of the circle. The center of the circle is the midpoint of the diameter, which can be found by taking the average of the x-coordinates and the y-coordinates. So, the center is ( (-3+0)/2 , (-4+0)/2 ) = (-1.5, -2). The radius of the circle is half the length of the diameter, which can be found using the distance formula as the distance between the center and one of the endpoints of the diameter. So, the radius is the distance between (-1.5, -2) and (-3, -4), which is √((-3-(-1.5))² + (-4-(-2))²) = √(2.5² + 2²) = √(6.25 + 4) = √10.25 = 3.205.

Final answer:

To cover the wooden cylinder with carpet, Sandy needs to find the surface area of the cylinder and then cut out a piece of carpet that matches that area.

Explanation:

To cover the wooden cylinder with carpet, Sandy needs to find the surface area of the cylinder and then cut out a piece of carpet that matches that area. The surface area of a cylinder can be found using the formula: SA = 2πr(r+h), where r is the radius of the base and h is the height of the cylinder. In this case, the diameter of the cylinder is 1 ft, so the radius is 1/2 ft. The height of the cylinder is 4 ft. Plugging these values into the formula, we get: SA = 2π(1/2)(1/2 + 4) = 2π(1/2)(9/2) = 9π square ft.

For this case we have that Newton's second law is given by:

[tex]F = m * a[/tex]

Where:

m: It's the mass

a: Acceleration

F: It's the force

According to the data we have:

[tex]2,000 = 40,000 * a[/tex]

Dividing between 40,000 on both sides of the equation:

[tex]a = \frac {2,000} {40,000}\\a = 0.05[/tex]

Thus, the acceleration is [tex]0.05 \frac {m} {s ^ 2}[/tex]

Answer:

[tex]0.05 \frac {m} {s ^ 2}[/tex]

To solve any questions relating to ages, I find it easier to make a table, like in the picture below.

See picture for answer and clear diagram.

-----------------------------------------------------------------

Notes/Explanations + answer in written form

Let's say that Halley's age now is:              x

That means that her age in 18 years is:      x + 18

It also means that her age 2 years ago is:   x - 2

In the question, we are told that when Halley is 18 years older than her current age,  she will be 5 times the age she was when she was 2 years younger than her current age

That means:

Halley's current age + 18 years = 5 times (Halley's current age - 2 years)

So we get this equation (which we solve to get the answer) :

x + 18 = 5 * (x -2)                      ( expand the brackets)

x + 18 = 5x - 10                          (subtract x from both sides)

18 = 4x - 10                                 (add 10 to both sides)

28 = 4x                                       (now divide both sides by 4)

7 = x

Therefore, Halley's current age is 7 years

-------------------------------------------------

Note: equation is:   x + 18 = 5 * (x -2)    

Answer: Multiply 100 to both the numerator and denominator.

The problem is simplifying a sequence of numeric addition. It involves finding the average of a range of sequential odd and even numbers and dividing the two averages. This simplifies to 100/101.

The problem presented is to simplify the sequential addition of odd numbers from 1 to 199, divided by the sequential addition of even numbers from 2 to 200. This is also known as calculating the average or mean of a set of sequential numbers, a concept in statistics.

To solve this, we need to understand that the average of a set of sequential numbers can be found by taking the sum of the first number and the last number, dividing it by two. Therefore, the sum of odd numbers from 1 to 199 can be simplified as (1+199)/2, and the sum of even numbers from 2 to 200 can be simplified as (2+200)/2.

Simplifying these gives us 100 for odd numbers and 101 for even numbers. Therefore, the simplification of the presented sequence is 100/101.

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Answer:

the answer to this question is x=3\4

Answer:

1 and 2

Step-by-step explanation:

look this solution :

$ 0.77 or 77 cents

because 77 out 100 is written in decimal form as .77

Hello there!

Answer:

Your answer would be $0.77

Step-by-step explanation:

The reason why $0.77 would be the correct answer is because that represents something that is lower than a dollar, more so you would know it as "cents."

When you look at the question, it says, "77/100 of a dollar." What that means is that there is 77 of a dollar, and a dollar is equivalent to one whole.

The denominator "100" represents a whole, so that means that there is 77 out of a whole.

When you know currencies, cents are lower than a whole, therefore would be represented as a decimal.

77/100 is equivalent to 0.77.

As a money amount, it would be $0.77.

$0.77 should be the CORRECT answer.

i’m pretty sure the answer is 40

Answer:

The answer is 40.

Step-by-step explanation:

Because the multiples of 8: 8, 16, 24, 32, 40, 48...etc

and 10: 10, 20, 30, 40, 50....etc and both of them have 40 so that's your LCM.

Hope i helped you! :)

Answer:

-15625 i think

For this case we must find the value of the following expression:[tex]-5 ^ 6 = -1 * 5 ^ 6[/tex]

This means that we must multiply the 5 six times, and then multiply by -1, that is:

[tex]5 ^ 6 = 5 * 5 * 5 * 5 * 5 * 5 = 15,625[/tex]

Then multiply by -1:

[tex]-15,625[/tex]

Answer:

[tex]-5 ^ 6 = -15,625[/tex]

7+3= 10

8/4=2

VEry easy okay

Answer: 13

Step-by-step explanation:

Given the expression [tex]7+3(8[/tex]÷[tex]4)[/tex], you can rewrite it as:

[tex]=7+3(\frac{8}{4})[/tex]

First, you need to solve the operation that is inside the parentheses. Then, you must divide 8 by 4:

 [tex]=7+3(2)[/tex]

Now you need to eliminate the parentheses. To do this, you must multipy 3 by 2, then:

 [tex]=7+6[/tex]

And finally, you must make the addition. Therefore, you get:

[tex]=13[/tex]

For this case we must find the solutions of the following quadratic equation:

[tex]x ^ 2-5x-1 = 0[/tex]

We solve by means of

[tex]x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}[/tex]

Where:

[tex]a = 1\\b = -5\\c = -1[/tex]

Substituting:

[tex]x = \frac {- (- 5) \pm \sqrt {(- 5) ^ 2-4 (1) (- 1)}} {2 (1)}\\x = \frac {5 \pm \sqrt {25 + 4}} {2}\\x = \frac {5\pm \sqrt {29}} {2}[/tex]

Finally, the roots are:

[tex]x_ {1} = \frac {5+ \sqrt {29}} {2}\\x_ {2} = \frac {5- \sqrt {29}} {2}[/tex]

Answer:

[tex]x_ {1} = \frac {5+ \sqrt {29}} {2}\\x_ {2} = \frac {5- \sqrt {29}} {2}[/tex]

Answer:

64

Step-by-step explanation:

Just completed this for edge.

Regression equation : Y = 0.44352X - 21.29443

Approximate height of man who wears size 7 shoe = 64 inches

Regression can be defined as a measurement that is used to quantify how the change in one variable will affect another variable. Regression is used to find the cause and effect between two variables.

Given, ordered pairs

(height in inches, men’s shoe size).

(70, 9.5)

(67, 8)

(69, 9)

(72, 11.5)

(68, 7.5)

(60, 6)

(71, 11)

Using regression calculator

Regression equation

Y = 0.44352X - 21.29443

Approximate height of  a man who wears a size 7 shoe

7 = 0.44352X - 21.29443

0.44352X = 28.29443

X = 28.29443/0.44352

X = 63.7951614 ≈ 64

Approximate height = 64 inches

Hence, Y = 0.44352X - 21.29443 is the regression equation,

64 inches is the approximate height of the man wearing size 7 shoe

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Answer:

$71

Step-by-step explanation:

First

61.72 times .15= 9.258

Second

61.72+9.258= 70.978

Answer:

Angle B: 135 degrees

Angle A: 60 degrees

Angle C:  75 degrees

Step-by-step explanation:

Angle B is 135 degrees

We have the complement of angle B, which is the lowest left corner of the triangle and it says 45 degrees.

So, B = 180 - 45 = 135 degrees

Angle A.

The lines crossing form 2 pair of identical angles from their tip... The exterior angle is 60 degrees, so the interior angle A is also 60 degrees.

Angle C.

Just like for angle B, we get angle C by subtracting its complement:

C = 180 - 105 = 75 degrees.

We can also validate by calculating the sum of the interior angles of the triangle: 45 + 60 + 75 = 180, which is perfect.

Binomial

A monomial is just one term. A binomial is two monomials added or subtracted together. A trinomial is three monomials added or subtracted together.

Answer:

It is a binomial because it has two terms

Answer: -12

x/4=-3

(x/4)(4)=-3(4)

x=-12

Answer:

Equation: x/9 + 2 = 8

Solution: x = 54

Step-by-step explanation:

I'd imagine the question is asking "two more than the quotient of a number and 9 is 8." Let's break this down:

- two more than means we're going to be adding two to the following quantity in the sentence.

- the quotient of a number and 9 we can interpret as a division expression. We don't know what "a number is," so we can give it a label (I'll pick n), and we can now write it is x/9. Taken with that last bullet point, our expression becomes x/9 + 2.

- Finally, we're told that the result of this expression is 8, so we can write the compete equation as x/9 + 2 = 8.

Now, if we want to solve this:

We can start by subtracting 2 from either side, giving us

x/9 = 6

And multiplying either side by 9 gives us the solution

x = 54.

Answer:

Step-by-step explanation:

Keep in mind that this is a polynomial and all odd-powered polynomials start low (read that as "in Quadrant III") and end high ("Quadrant I").  So yes, the fourth answer choice, D, is the correct one.

(D) The graph of the function starts with low and high ends.

Remember that this is a polynomial and that all odd-powered polynomials have a low starting point (read it as "in Quadrant III") and a high ending point ("Quadrant I").

Therefore, the correct answer is (D) the graph of the function starts with low and high ends.

Know more about functions here:

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Answer:

327

Step-by-step explanation:

You will plug in the -3 for x. 6 times -3 equals -18. -18 squared equals 324. 324 minus -3 equals 327.

Answer: [tex]f(-3)=57[/tex]

Step-by-step explanation:

Given the following function:

[tex]f(x)=6x^2-x[/tex]

To find [tex]f(-3)[/tex] you need to substitute the x value [tex]x=-3[/tex] into the function [tex]f(x)[/tex] given.

Therefore, when the input value (value of the variable "x") is -3, then the ouput value is:

[tex]x=-3\\\\f(-3)=6(-3)^2-(-3)[/tex]

Remember the multplication of signs:

[tex](+)(+)=+\\(-)(-)=+\\(-)(+)=-[/tex]

Then:

[tex]f(-3)=57[/tex]

For this case we must resolve the following expression:

[tex](-7p) ^ 3[/tex]

So:

[tex](-7p) ^ 3 =\\(-7p) (- 7p) (- 7p) =[/tex]

By law of multiplication of signs we have:

[tex]- * - = +\\+ * - = -[/tex]

Also:

[tex]7 * 7 * 7 = 343\\p * p * p = p ^ 3[/tex]

Finally, we have that the expression is equivalent to:

[tex](-7p) ^ 3 = -343p ^ 3[/tex]

ANswer:

[tex]-343p ^ 3[/tex]

Answer:

Choice C is correct

Step-by-step explanation:

The first step is to re-write the equations in exponential form.

The first equation can be written as;

[tex]\frac{M}{N}=10^{4}[/tex] since the base is 10 and 4 the exponent.

The second equation can be written as;

[tex]\frac{P}{N}=10^{5}[/tex]

The second step is to make N the subject of the formula in both equations.

Solving for N from this equation [tex]\frac{M}{N}=10^{4}[/tex], yields;

[tex]N=\frac{M}{10^{4}}[/tex]

Solving for N from the second equation [tex]\frac{P}{N}=10^{5}[/tex], yields;

[tex]N=\frac{P}{10^{5}}[/tex]

Therefore;

[tex]\frac{M}{10^{4}}=\frac{P}{10^{5} }\\\\P=10M[/tex]

Answer:   5/y

Step-by-step explanation:

Answer: OPTION C

Step-by-step explanation:

A relation is a function when each input value has one and only output value.

For option A:

 (2,4), (-5, 6), (2, 3), (-6, 2)

You can observe that the input value "2" has two output values. Then it is not a function.

For option B:

(8, 1), (-5, 4), (2, 1), (8, 2)

You can observe that the input value "8" has two output values. Then it is not a function.

For option C:

(2,4), (-5, 2), (8, 1), (-6, 2)

You can observe that each input value has only one output values. Then it is a function.

For option D:

(2,0).(-5, 3), (8, 1), (-5,5)

You can observe that the input value -5 has two output values. Then it is not a function.

For a set of data to be a function each x value has to have different y values.

A. (2,4), (-5, 6), (2, 3), (-6, 2)

B. (8, 1), (-5, 4), (2, 1), (8, 2)

D. (2,0).(-5, 3), (8, 1), (-5,5)

The bolded coordinates are the ones of each data set that makes it not a function. As you can see the x values all have different y values.

This leaves C. as the answer!

Hope this helped!

Answer:

Part 1) [tex]y+8=3(x+2)^{2}[/tex] -----> [tex]y=-8.08[/tex]

Part 2) [tex]y-14=-(x-3)^{2}[/tex] ---->  [tex]y=14.25[/tex]

Part 3) [tex]y+7.5=2(x+2.5)^{2}[/tex] ---->  [tex]y=-7.625[/tex]

Part 4) [tex]y-17=-(x-3)^{2}[/tex] -----> [tex]y=17.25[/tex]

Part 5) [tex]y+7=(x-4)^{2}[/tex] ----> [tex]y=-7.25[/tex]

Part 6) [tex]y-6=-(x-1)^{2}[/tex] ---->  [tex]y=6.25[/tex]

Step-by-step explanation:

we know that

The equation of a vertical parabola in vertex form is equal to

[tex]y-k=\frac{1}{4p}(x-h)^{2}[/tex]

where

(h,k) is the vertex

The directrix is

[tex]y=k-p[/tex]

case 1) we have

[tex]y+8=3(x+2)^{2}[/tex]

the vertex is the point (-2,-8)  

[tex]\frac{1}{4p}=3[/tex]

[tex]p=\frac{1}{12}[/tex]

The directrix is equal to

[tex]y=-8-\frac{1}{12}=-8.08[/tex]

case 2) we have

[tex]y-14=-(x-3)^{2}[/tex]

the vertex is the point (3,14)  

[tex]\frac{1}{4p}=-1[/tex]

[tex]p=-\frac{1}{4}[/tex]

The directrix is equal to

[tex]y=14+\frac{1}{4}=14.25[/tex]

case 3) we have

[tex]y+7.5=2(x+2.5)^{2}[/tex]

the vertex is the point (-2.5,-7.5)    

[tex]\frac{1}{4p}=2[/tex]

[tex]p=\frac{1}{8}[/tex]    

The directrix is equal to

[tex]y=-7.5-\frac{1}{8}=-7.625[/tex]

case 4) we have

[tex]y-17=-(x-3)^{2}[/tex]

the vertex is the point (3,17)      

[tex]\frac{1}{4p}=-1[/tex]

[tex]p=-\frac{1}{4}[/tex]    

The directrix is equal to

[tex]y=17+\frac{1}{4}=17.25[/tex]

case 5) we have

[tex]y+7=(x-4)^{2}[/tex]

the vertex is the point (4,-7)      

[tex]\frac{1}{4p}=1[/tex]

[tex]p=\frac{1}{4}[/tex]    

The directrix is equal to

[tex]y=-7-\frac{1}{4}=-7.25[/tex]

case 6) we have

[tex]y-6=-(x-1)^{2}[/tex]

the vertex is the point (1,6)      

[tex]\frac{1}{4p}=-1[/tex]

[tex]p=-\frac{1}{4}[/tex]    

The directrix is equal to

[tex]y=6+\frac{1}{4}=6.25[/tex]

The correct matches are: Directrix y = -7.25 → Equation of Parabola: y + 7 = (x - 4)², Directrix y = 6.25 → Equation of Parabola: y - 6 = -(x - 1)², Directrix y = 17.25 → Equation of Parabola: y - 17 = -(x - 3)², Directrix y = 14.25 → Equation of Parabola: y - 14 = -(x - 3)².

To match the equations representing parabolas with their directrixes, it's essential to understand the standard form of a parabola's equation related to its axis of symmetry.

For a vertical parabola, the standard form is y = a(x - h)² + k, where the vertex is at (h, k) and the directrix is y = k - 1/(4a) for a parabola that opens upwards, or y = k + 1/(4a) for a parabola that opens downwards.

For a horizontal parabola, the standard form is x = a(y - k)² + h. In our case, all given equations are in the vertical form where x is squared.

Let's take each equation and find its directrix:

With the directrix found for each equation, the correct matches are:

A: 8,250

B: 22

Step-by-step explanation:

A: 15 * 250 = 3,750 + 4,500 = 8,250

B: 10,000 - 4,500 = 5,500/250 = 22. 22 * 250 + 4,500 = 10,000

Answer: Surface area is equal to 200[tex]cm^{2}[/tex]

Volume is equal to 333.33[tex]cm^{3}[/tex]

Step-by-step explanation:

First, let's do surface area.

The surface area of a pyramid is equal to 1/2(perimeter of base)(lateral height) + area of the base

The perimeter of the base is 10(4) = 40; as the base is a square with a side length of 10.

The lateral height is given as 5 cm.

The area of the base is 10(10) = 100.

We can plug those numbers into the equation to get 1/2(40)(5) + 100, which comes out to be 200[tex]cm^{2}[/tex].

Now for volume.

The volume of a pyramid is equal to 1/3(area of the base)(height).

We already have the area of the base, which is 100.

The height is given as 10 cm.

Plugging those numbers into the equation, we get 1/3(100)(10), which is 1000/3 or about 333.33[tex]cm^{3}[/tex].

Hope this helps!

Answer:

Fraction                         Colon                     To

[tex]\frac{11}{5}[/tex]       11 : 5                     11 to 5

Answer with explanation:

We have to write the comparison below as in fractions , in colon and in words to 11 ounces to 5 ounces.

In Fractions

[tex]\frac{11}{5}[/tex]

In Colon

11 :5

In Words

→1 Ounce=29 grams (Approx)

The ratio of Ash gourd bought by me and my mother was 11 ounce to 5 ounce.

Answer:

y = 2/5x.

Step-by-step explanation:

This is the correct answer to this question.

Hope this helps!!!

Kyle.

Y=2/5x is the answer to this graph as the equation

Answer:

[tex]y=\frac{1}{52}x^2[/tex]

Step-by-step explanation:

The focus of the parabola is (0,13)

and the directrix is y=-13.

The equation of this parabola is given by:

[tex]x^2=4py[/tex]

The vertex of this parabola is at the origin.

The value of p is the distance from the vertex to the focus.

p=13-0=13

The equation of the parabola is

[tex]x^2=4(13)y[/tex]

[tex]x^2=52y[/tex]

Or

[tex]y=\frac{1}{52}x^2[/tex]

Answer:

1/2 - 2/6 = 1/6

Step-by-step explanation:

to answer two that are different simply take the lesser up or higher down example: 1/2-2/4 this would be zero because 2 x 1/2 = 2/4

1/2-2/6= 0.16

hope this helps