Find the value of x in the figure. Please Explain


A)34.9

B)55.1

C)90

D)124.9

Answer:

[tex]\large\boxed{x=-4\ \vee\ x=7}[/tex]

Step-by-step explanation:

[tex]x^2-3x-28=0\\\\x^2+4x-7x-28=0\\\\x(x+4)-7(x+4)=0\\\\(x+4)(x-7)=0\iff x+4=0\ \vee\ x-7=0\\\\x+4=0\qquad\text{subtract 4 from both sides}\\x=-4\\\\x-7=0\qquad\text{add 7 to both sides}\\x=7[/tex]

Answer:

hope it's help you.

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To find what y is when x = 7 plug 7 into x in the equation and solve

y = 7 - 3

y = 4

When x is 7, y is 4

To find what x is when y = 1 plug 1 into y  in the equation and solve

1 = x - 3

1 + 3 = x + (-3 + 3)

4 = x + 0

4 = x

When y is 1, x is 4

To find what x is when y = 7 plug 7 into y in the equation and solve

7 = x - 3

7 + 3 = x + (-3 + 3)

10 = x + 0

10 = x

When y is 7, x is 10

Hope this helped!

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A is the correct answer. Factor by grouping

Answer:B

Step-by-step explanation:

Is easy

54 students on each bus

Answer:

22. Perimeter = 52 units

     Area = 160 Square Units

23. Notation form :  [tex] 2 \times 10^{5}[/tex]

     Standard Form : 200000

Step-by-step explanation:

22.

The formula for perimeter is

P = 2 (length + Width )

  = 2 ( 2x+3x+1)

  =  2(5x+1)

The Formula for Area of a rectangle is

A= length x width

A= [tex]2x \times (3x+1)[/tex]

A=[tex]6x^2+2x[/tex]

Now we have to find the Perimeter and Area for x = 5

P = 2(5 x 5 +1)

P= 2(26)

P=52 units

A= 6 x 5 x 5 + 2 x 5

A= 150 + 10

A= 160 square units

23.

A. By using rule of exponents , we can determine that both the results will be same.

B.

Miriam's calculation

[tex]\frac{2.8 \times 10^{9}}{1.4 \times 10^{4}}[/tex]

[tex]\frac{2.8}{1.4} \times 10^{9-4}[/tex]

[tex]2 \times 10^5[/tex]

Priya's calculation

[tex]\frac{2.8 \times 10^{2}}{1.4 \times 10^{-3}}[/tex]

[tex]\frac{2.8}{1.4} \times 10^{2-(-3)}[/tex]

[tex]2 \times 10^5[/tex]

Standard notation

[tex]2 \times 10^5 = 200000[/tex]

The answer is:

In 2036 there will be a population of 32309 rabbits.

We can calculate the exponential decay using the following function:

[tex]P(t)=StartAmount*(1-\frac{percent}{100})^{t}[/tex]

Where,

Start Amount, is the starting value or amount.

Percent, is the decay rate.

t, is the time elapsed.

We are given:

[tex]StartAmount=144,000\\x=7.2(percent)\\t=2036-2016=20years[/tex]

Now, substituting it into the equation, we have:

[tex]P(t)=StartAmount(1-\frac{percent}{100})^{t}[/tex]

[tex]P(t)=144000*(1-\frac{7.2}{100})^{20}[/tex]

[tex]P(t)=144000*(1-0.072)^{20}[/tex]

[tex]P(t)=144000*(0.928)^{20}[/tex]

[tex]P(t)=144000*(0.928)^{20}[/tex]

[tex]P(t)=144000*0.861=32308.888=32309[/tex]

Hence, we have that in 2036 the population of rabbis will be 32309 rabbits.

Have a nice day!

The population of rabbits in 2036 is 32309 and this can be determined by using the exponential decay function.

Given :

The formula for the exponential decay function is given by:

[tex]\rm A = P(1-\dfrac{r}{100})^t[/tex]

Now, substitute the value of known terms in the above formula.

[tex]\rm A = 144000(1-\dfrac{7.2}{100})^{20}[/tex]

Simplify the above expression.

[tex]\rm A = 144000\times (0.928)^{20}[/tex]

[tex]\rm A = 32308.888[/tex]

A [tex]\approx[/tex] 32309

So, the population of rabbits in 2036 is 32309.

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Answer:

2 1/3 yds

Step-by-step explanation:

We need to subtract 1 1/6 yds from 3 1/2 yds to answer this question.

The LCD is 6:

3 1/2 - 1 1/6 becomes 3 3/6 - 1 1/6.  This results in 2 2/6, or 2 1/3, yds

Jim must purchase 2 1/3 yds more of burlap.

For this case we must subtract the amounts to know how many yards of burlap Jim should buy:

[tex]3 \frac {1} {2} = \frac {6 + 1} {2} = \frac {7} {2}\\1 \frac {1} {6} = \frac {6 + 1} {6} = \frac {7} {6}[/tex]

We subtract the amounts:

[tex]\frac {7} {2} - \frac {7} {6} = \frac {42-14} {12} = \frac {28} {12} = \frac {14} {6} = \frac { 7} {3}[/tex]

We convert to a mixed number:

[tex]2 \frac {1} {3}[/tex]

ANswer:

Option B

Oxygen and silicone

Answer:

3(x+6)

Step-by-step explanation:

3x+18

Both the 3 and the 18 are multiples of 3, so factor out a 3

3(x+6)

Answer: C. the circumferences of the base of each cylinder must be the same

Step-by-step explanation:

Check the picture below.

so we know that the area of the base of the 1st cylinder is 452.16, and the radius of the 2nd cylinder is 12, hmmm what is the radius of the 1st cylinder anyway?

[tex]\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\ \cline{1-1} A=452.16 \end{cases}\implies 452.16=\pi r^2\implies \cfrac{452.16}{\pi }=r^2 \\\\\\ \stackrel{\pi =3.14}{\cfrac{452.16}{3.14 }}=r^2\implies 144=r^2\implies \sqrt{144}=r\implies 12=r[/tex]

low and behold, the radius of the 1st one is 12 as well, so both cylinders have the same radius.  Let's recall the volume of a cylinder is V = πr²h.

now if they can just have the same height, they'd both have the same volume.

The rational number equivalent to 0.9375 is 15/16, obtained by converting the decimal to a fraction and then simplifying it.

The rational number that is equivalent to 0.9375 can be determined through a process known as converting a decimal to a fraction. To do this, you associate the number with the place value of the last digit. In the case of 0.9375, the last digit is in the ten-thousandth place, so we write it out as 9375/10000.

Simplifying this fraction by dividing both the numerator and denominator by the greatest common divisor (in this case, 625), we get 15/16. Therefore, out of the given options, 0.9375 is equivalent to the rational number 15/16.

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Answer: D) y = -3 sin 8x

Step-by-step explanation:

The given graph has an amplitude of 3 (A = 3) and a period of π/2 (B = 4).

Therefore, the equation of the graph is: y = 3 sin 8x    Option A

Option B is a reflection of Option A, shifted π units to the left

Option C is Option A, shifted 2π units to the right

Both Options B and C are equivalent to Option A

Option D is a reflection of Option A but since there is no horizontal shift, it cannot be equivalent to Option A

Answer: The answer would be D. 64

Step-by-step explanation: Understanding that the question noted that the second rectangle was dilated from PQRS, which has a perimeter of 16. With the coordinates of point P for the first rectangle being (2,0.5) whilst the second rectangle has point P at (8,2). To figure out the perimeter, divide point P from the second rectangle with point P from the first. The result would be 4. Thus, the scale factor is 4, which you then multiply the perimeter of PQRS by, which was 16. 16 times 4 equals 64.

Answer: D

Explanation: It is D

Answer:

the mode is 3 and 5

Step-by-step explanation:

If there is a tie between the modes, it is called bimodal. There can be 2 modes in a data set.

Answer:

the mode is 3 AND 5 which means it is a bimodal

Step-by-step explanation:

Answer:

A firm determines its profit by subtracting "Total Cost" from "Total Revenue".

Step-by-step explanation:

We have been given a statement "A firm determines its profit by subtracting _____ from ______. Now we need to fill the blanks with suitable words.

We know that there are some initial costs associated with production of any product. So to get the profit, we need to subtract the cost that that is spent during production of the product from total sales.

Hence final answer can be written as:

A firm determines its profit by subtracting "Total Cost" from "Total Revenue".

Answer:

The perimeter is 24 sq inches.

Step-by-step explanation:

In order to find perimeter, you must add together all the sides. So the equation would be (LxW)2 , or just Length plus Length plus Width plus Width. Therefore, it is either (7x5)2 or 7 + 7 + 5 + 5 which both equal 24 sq inches. Hope this helps!

The perimeter of a rectangle with an area of 35 square inches, length of 7 inches, and width of 5 inches is calculated using the formula P = 2l + 2w, resulting in a perimeter of 24 inches.

To calculate the perimeter of a rectangle when given the area and the dimensions, we use the formula P = 2l + 2w, where 'P' represents the perimeter, 'l' is the length, and 'w' is the width of the rectangle. If we know the length is 7 inches and the width is 5 inches, we can plug these values into the formula to find the perimeter:

P = 2(7) + 2(5) = 14 + 10 = 24 inches.

Therefore, the perimeter of the rectangle with an area of 35 square inches, length of 7 inches, and width of 5 inches is 24 inches.

Answer:

see explanation

Step-by-step explanation:

To find the x- intercepts let y = 0, that is

(x - 4)(x + 2) = 0

Equate each factor to zero and solve for x

x - 4 = 0 ⇒ x = 4

x + 2 = 0 ⇒ x = - 2

x- intercepts are x = - 2 and x = 4

The vertex lies on the axis of symmetry which is located at the midpoint of the x- intercepts, thus

[tex]x_{vertex}[/tex] = [tex]\frac{-2+4}{2}[/tex] = 1

Substitute x = 1 into the equation for corresponding value of y

y = (1 - 4)(1 + 2) = - 3 × 3 = - 9

vertex = (1, - 9)

The x-intercept of the line will be  x = 4 and x = -2 and Vertex = (1, - 9).

The x-intercepts are the points where the graph intersects the x-axis. The vertex is the point that defines the minimum or maximum of a parabola.

We have,

y = (x - 4) (x + 2)

Now,

So, to get the x-intercept,

Put y = 0,

i.e.

0 = (x - 4) (x + 2)

NOw,

x - 4 = 0

⇒ x = 4,

And,

x + 2 = 0

⇒ x = -2

So,

x-intercepts are x = 4 and x = -2.

Now,

To get the vertex ,

For vertex,

The vertex lies on the axis of symmetry which is located at the midpoint of the x- intercepts, thus

Vertex for x [tex]=\frac{-2+4}{2}=1[/tex]

Now,

Substitute x = 1 into the equation,

i.e.

y = (1 - 4)(1 + 2)

= - 3 × 3 = - 9

So,

Vertex = (1, - 9)

Hence, we can say that the x-intercept of the line will be  x = 4 and x = -2 and Vertex = (1, - 9)

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The answer is:

[tex]Sin(A)=0.93[/tex]

To solve the problem, remember to set your calculator in "degree mode"

So, we are given that the angle A is equal to 68°

So, we have that:

[tex]Sin(A)=Sin(68\°)=0.93[/tex]

Hence, we have that:

[tex]Sin(A)=0.93[/tex]

Have a nice day!

Answer:

[tex]\large\boxed{-\dfrac{4}{2}=-2}[/tex]

Step-by-step explanation:

[tex]a_1,\ a_2,\ a_3,\ a_4,\ ...-\text{geometric sequence}\\\\\dfrac{a_2}{a_1}=\dfrac{a_3}{a_2}=\dfrac{a_4}{a_3}=...-\text{common ratio}\\\\======================\\\\\text{We have}\\\\-2,\ 4,\ -8,\ 16,\ -32,\ ...\\\\\text{The common ratio:}\\\\\dfrac{4}{-2}=-2\\\\\dfrac{-8}{4}=-2\\\\\dfrac{16}{-8}=-2\\\\\dfrac{-32}{16}=-2[/tex]

Answer:

Dividing two binomials will not always result in a polynomial. For instance, divide (x+2) over (x+3) and we won't get a polynomial. The result is known to be a rational expression but not a polynomial. So that's why division is not closed for polynomials.

Contrast that with addition, subtraction and multiplication. For any of those operations taking two polynomials and adding them, subtracting them, or multiplying them will lead to another polynomial. That's why these operations are closed for polynomials.

~ Therefor the answer is B.

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Answer:

The answer will Be B

Step-by-step explanation:

Answer:

the circumference of the outer edge of the path around the pool is 113.04 ft

Step-by-step explanation:

Hello, I think I can help you with this

the circumference is given by:

S=2π*r

where, S is the length of the circumference,π=3.14159.., r= radius

Step one

define the radius

the total radius of the pool and the path is

radius=15 ft + 3 ft

radius=18 ft

Step two

π=3.14

radius=18 ft

put the values into the equation

S=2π*r

S=2*3.14*18 ft

S=113.04 ft

the circumference of the outer edge of the path around the pool is 113.04 ft

I hope it helps, Have a nice day.

we can simplify it to this:

[tex]y = - 2 {x}^{2} - 12x - 16 [/tex]

so we know it , the intercept in a standard equation of a parabola is C:

[tex]a {x}^{2} + bx + c[/tex]

so the intercept is (-16) and for the vertex use:

x=-b/2a

[tex]x = \frac{12}{ - 4} = - 3 [/tex]

so now put it in the equation and get the y of vertex:

y=-18+36-16=2 ==>vertex(-3,2)

Final answer:

The vertex of the function y=-2(x+3)²+2 is (-3, 2). The y-intercept is at (0, -16).

Explanation:

To identify the vertex and the y-intercept of the graph of the function y=-2(x+3)2 +2, we need to understand the structure of a quadratic function in vertex form, which is y=a(x-h)2+k, where (h, k) is the vertex of the parabola and a determines the direction and width of the parabola.

For the given function, the vertex can be found by looking at the values inside the parentheses and the constant term outside. In this case, the vertex is at x = -3 and y = 2, so the vertex is (-3, 2). The y-intercept occurs where x = 0. Substituting x = 0 into the function, we get y = -2(0+3)2+2 = -2(9)+2 = -18+2 = -16. Therefore, the y-intercept is at (0, -16).

Answer:

Let the speed of the train be x km/h.

Case 1:

Distance = 288 km

Speed = x km/h

Time = Distance/Speed

= 288/x h

Case 2:

Distance = 288 km

Speed = (x+4) km/h

Time = 288/x + 4 h

Since 288/x > 288/x + 4

288/x - 288/x+4 = 1

288[1/x - 1/x+4 ] = 1

[ x + 4 - x / x(x + 4) ] = 1/288

[4 / x^2 + 4x ] = 1/288

x^2 + 4x = 1152

x^2 + 4x - 1152 = 0

x^2 + 36x - 32x - 1152 = 0

x(x + 36) - 32(x + 36) = 0

(x + 36)(x - 32) = 0

x + 36 = 0 , x - 32 = 0

x = -36 , x = 32

x = -36 , rejected since speed cannot be negative.

Therefore , speed of the train = 32 km/h

Answer:

2,294.66 square inches

Step-by-step explanation:

The area of an octagon is given by the formula:

A = 2 * a² * ( 1 + √2 )

So, if we input the numbers we have:

A = 2 * 21.8² * ( 1 + √2 )

A = 2 * 475.24 * (2.4142)

A = 2,294.66 square inches

As you can see, if you double the side of an octagon, its area will quadruples, which is logic since the one variable in the calculation of the area is the side's length... that is squared.  So, if you double it, that double factor is squared.

It's as if we had written  

A = 2 * (10.9 * 2)² * ( 1 + √2 )

A = 2 * (10.9² * 2²) * ( 1 + √2 )

Answer:

2) 3

Step-by-step explanation:

Graphing the best-fit quadratic curve for the data-set can be done using Ms. Excel Application.

The first basic step is to enter the data into any two adjacent columns of the excel workbook. Highlight the two columns where the values have been entered, click on the insert tab and then select the x,y scatter-plot feature. This will create an x,y scatter-plot for the data.

Next, click on the Add Chart Element feature and add a polynomial trend-line of order 2 which is basically a quadratic curve. Finally, check the display equation on chart box. This step will plot the quadratic curve as well as give the equation of the best-fit quadratic curve.

The attachment below shows the best-fit quadratic curve to the data-set and its corresponding equation.

A good approximation for the value of c from the equation is thus 3. This is simply the y-intercept of the curve. 3.21 is closer to 3.

Answer:

A. 1/8

Step-by-step explanation:

Let

P(A) be the event that white marble is drawn

P(B) be the event that black marble is drawn

P(A) = 1/4

P(B) = 1/2

Both events A and B are independent as the first marble is put back before drawing the second marble. So the probabilities of two independent events are multiplied.

P(A and B) = P(A) * P(B)

= 1/4 * 1/2

=1/8

Option A is the correct answer..

Answer:

The solution set is { (3, 4), (5 , 0) }.

Step-by-step explanation:

x^2 + y^2= 25

2x   +   y =  10

We use substitution:

From the second equation y = 10 - 2x.

Substituting for y in the first equation:

x^2 + (10 -2x)^2 = 25

x^2 + 100 - 40x + 4x^2 - 25 = 0

5x^2 - 40x  + 75 = 0

Divide through by 5:

x^2 - 8x + 15 = 0

(x - 3)(x - 5) = 0

x = 3, 5.

when x = 3 , y = 10 - 2(3) = 4.

when x = 5, y = 10 - 2(5) = 0.

Answer:

(3,4) (5,0)

Step-by-step explanation:

TLDR: The answer is -2.

What you have here is a function with a point on the graph. It is understood that “x” represents the input and “y” represents the output, so we’re looking for the right “x” that will give y = 1/100.

To start, we can substitute the y-value into the function like this:

y = 10^x

1/100 = 10^x

From here, we can take two different pathways; one requires conceptual knowledge while the other relies on the knowledge of logarithms.

Conceptual

For the conceptual, we know that 100 = 10^2, so 1/100 is the same as 1/10^2. We also know that the inverse of a fraction is the same as the number to the negative of its power (for example, 1/2 is equal to 2^-1), so we know that 1/10^2 is the same as 10^-2. So far, we have learned that:

1/100 = 10^x

1/10^2 = 10^x

10^-2 = 10^x

So, to satisfy this, “x” must equal -2.

Logarithms

For logarithms, we can use powers and math to actually calculate the value of “x”. We know that:

1/100 = 10^x

To solve this, we need “x” to be by itself on one side of the equation. To do this, we can perform the inverse function of an exponent, which is a logarithm. In this case, the base of 10^x is 10, so we need a “base 10” logarithm to solve this function. Apply this function to both sides and simplify:

1/100 = 10^x

log10(1/100) = log10(10^x)

log10(1/100) = x

The log10 function is the inverse of 10^x, so they cancel out to leave “x”. Plug log10(1/100) into a calculator, and you find that x = -2.

Hope this helps!