At a competition with 5 runners, 5 medals are awarded for first place through
fifth place. Each medal is different. How many ways are there to award the
medals?
Decide if the situation involves a permutation or a combination, and then find
the number of ways to award the medals.
​

C. If a<0, then the parabola opens down

Answer:

[tex]4w^4-7z^4+6w^2z^2[/tex]

Step-by-step explanation:

We can reformat this equation so we can vertically add.

Then, we can just add down.

Since all the degrees and the variables are the same, we only have to worry about the coefficients.

5 - 1 = 4 --> [tex]4w^4[/tex]

-7 + 13 = 6 --> [tex]6w^2z^2[/tex]

-3 - 4 = -7 --> [tex]-7z^4[/tex]

Now let's rewrite this.

[tex]4w^4-7z^4+6w^2z^2[/tex]

Answer:

Okay I might not be right on this one but, I believe you divide 27 and 3. As to the part about simplifying, you might want to give me so details.

Step-by-step explanation:

Translations, rotations, and reflections are all rigid transformations.

if we take 20 to be the 100%, what is 11 off of it in percentage?

[tex]\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 20&100\\ 11&x \end{array}\implies \cfrac{20}{11}=\cfrac{100}{x}\implies 20x=1100 \\\\\\ x=\cfrac{1100}{20}\implies x=55[/tex]

A triangle's sides are suppose to add up to 360 degrees. So create a alegbraic equation with x as the variable. So the equation should add up to 720 degrees for two triangles.

720 = 15x - 3 + 56

720 = 15x + 53

667 = 15x

x = 44.5 (rounded to tenth)

Tell me if I'm incorrect.

Answer:

x = 3

Step-by-step explanation:

The line segment is an angle bisector thus the following ratios are equal

[tex]\frac{32}{24}[/tex] = [tex]\frac{6x+6}{9x-9}[/tex], that is

[tex]\frac{4}{3}[/tex] = [tex]\frac{6x+6}{9x-9}[/tex] ( cross- multiply )

4(9x - 9) = 3(6x + 6) ← distribute parenthesis on both sides

36x - 36 = 18x + 18 ( subtract 18x from both sides )

18x - 36 = 18 ( add 36 to both sides )

18x = 54 ( divide both sides by 18 )

x = 3

answer for this question is (d)3x2-x+6

This is the answer:)

Answer:

y=2x  when x>5

Step-by-step explanation:

y=|x−5|+|x+5|

If x > 5 then x-5 is greater than 0 so we can remove the absolute value bars from the first term

x>5 then x+5 >0 so we do not need the absolute value bars on the second term

y = x-5 + x+5

Combine like terms

y = x+x-5+5

y = 2x

Answer:

[tex]f(x)=3^x[/tex]

Step-by-step explanation:

Given that the function is represented by the graph below, which  begins in the second quadrant near the x−axis and increases slowly while crossing the ordered pair 0, 1. When the graph enters the first quadrant, it begins to increase quickly throughout the graph

Because it passes through (0,1) it is of the form

[tex]y=a^x[/tex]

Also for negative x large it is very near x axis, So a must be positive then only it increases faster in the I quadrant.  Range is only posiitve real numbers

So the function is

[tex]f(x) =3^x[/tex]

Answer:

c. amplitude: 1; period: [tex]2\pi[/tex]

Step-by-step explanation:

The given function is [tex]f(t)=- \cos t[/tex]

This function is of the form;

[tex]y=A \cos Bt[/tex]

where [tex]|A|[/tex] is the amplitude.

When we compare [tex]f(t)=- \cos t[/tex] to [tex]y=A \cos Bt[/tex], we have

[tex]A=-1[/tex], therefore the amplitude of the given cosine function is [tex]|-1|=1[/tex]

The period is given by;

[tex]T=\frac{2\pi}{|B|}[/tex]

Since B=1, the period is [tex]T=\frac{2\pi}{|1|}=2\pi[/tex]

Answer:

c. amplitude: [tex]\displaystyle 1;[/tex]period: [tex]\displaystyle 2\pi[/tex]

Explanation:

[tex]\displaystyle f(t) = Acos(Bx - C) + D \\ \\ Vertical\:Shift \hookrightarrow D \\ Horisontal\:[Phase]\:Shift \hookrightarrow \frac{C}{B} \\ Wavelength\:[Period] \hookrightarrow \frac{2}{B}\pi \\ Amplitude \hookrightarrow |A| \\ \\ Vertical\:Shift \hookrightarrow 0 \\ Horisontal\:[Phase]\:Shift \hookrightarrow 0 \\ Wavelength\:[Period] \hookrightarrow \frac{2}{B}\pi \hookrightarrow \boxed{2\pi} \hookrightarrow \frac{2}{1}\pi \\ Amplitude \hookrightarrow 1[/tex]

With the above information, you now should have an idea of how to interpret graphs like this.

I am joyous to assist you at any time.

The correct graph for the function f(x) = x3 - 4x2 - x + 4 should intersect the y-axis at 4, should have three x-intercepts and should fall to the left and rise to the right. From given options, the best representation would be a cubic polynomial that has x intercepts negative 1, 1, and 4, and intersects the y axis at a point between 0 and 5.

To choose the correct graph of the function f(x) = x3, we need to consider its properties: the y-intercept, x-intercepts, and overall shape. The y-intercept can be found by substituting x = 0 into the equation, which gives us f(0) = 4. Thus, we are looking for a graph that crosses the y-axis at 4.

The x-intercepts of the function are the values of x for which f(x) = 0. In this case, solving this equation might be complex, but we should look for a graph with 3 x-intercepts as it's a cubic equation.

As for the overall shape, since the function is cubic and the sign of the leading coefficient is positive, its graph falls to the left and rises to the right. Therefore, the graph that best represents the function is a graph of a cubic polynomial that falls to the left and rises to the right, has x intercepts negative 1, 1, and 4, and intersects the y axis at a point between 0 and 5.

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Answer:

option B

Step-by-step explanation:

Step 1

A + B = C

[tex]A=\left[\begin{array}{ccc}8&-3\\3&y+2\end{array}\right][/tex][tex]+B=\left[\begin{array}{ccc}3x&z+4\\w&1/2y\end{array}\right][/tex]

=

[tex]C=\left[\begin{array}{ccc}x&2z\\4&y\end{array}\right][/tex]

Step 2

[tex]\left[\begin{array}{ccc}8+3x&-3+z+4\\3+w&y+2+y/2\end{array}\right][/tex][tex]=\left[\begin{array}{ccc}x&2z\\4&y\end{array}\right][/tex]

Step 3

4 equations are form

Equation 1

8 + 3x = x

8 = -2x

x = -4

Equation 2

-3 + z + 4 = 2z

1 + z = 2z

1 = z

z = 1

Equation 3

3 + w = 4

w = 1

Equation 4

y + 2 + y/2 = y

2 + y/2 = 0

4 + y = 0

y = -4

Step 4

[tex]\left[\begin{array}{ccc}3(-4)&1+4\\1&1(-4)/2\end{array}\right][/tex]

[tex]\left[\begin{array}{ccc}-12&5\\1&-2\end{array}\right][/tex]

Answer:

B

Step-by-step explanation:

I got 100% on EDGE 2020 Unit test

Do what? I can't see a question

repost and let me know once it’s up because I can’t see the picture

Good luck,

:)

Using line of best fit and correlation coefficient, the correlation coefficient of determination represent the percentage of data that is closest to the lines of best fit.

Line of best fit refers to the "a line through a scatter plot of data points that best expresses relationship between those points". Lines of best fit is used to describe data and predict data where the new data will appear. Examples for lines of best fit is 'Least square method'.

Two variables wherein "change in the value one variable produces a change in the variable other variable then it is called variables are correlated or there is a correlation coefficient".

According to the question,

In order to determine the correlation between two variables on a graph using line of best fit and correlation coefficient.

Correlation coefficient holds only if there is a linear correlation between the variables; that is the relationship between the variables is linear in graph. Variation in 'y' is caused by variation in 'x' on graph . Variation in 'x' is caused by variation 'y' on graph. Variable 'x' and variable 'y' are jointly dependent on graph. This is how we determine the correlation coefficient between two variables on the graph.

Line of best fit suppose (x₁, y₁) (x₂, y₂) ..... (xₙ, yₙ) be 'n' pairs of values on a graph to determine the line of best for this data. Assume 'y = a + b x' as a line of best fit (trend line). Using the principle of least squares we can determine the parameter 'a' and 'b'. It can be shown that 'a' and 'b' are determined by the equation.

n a + b∑ x = ∑y  -->(1)

a ∑x +b ∑x² = ∑x y  --->(2)

These equations are called Normal equation. Therefore, the line of best fit is y=a x+ b where 'a' and 'b x' are given by the equation. This is how we determine the correlation or relationship between two variables on a graph.  

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Answer:

Most likely 60-75%

Step-by-step explanation:

60-75 is where most of the data points lie, so it is most likely that the actual percentage is within that interval.

Answer:

neither am i bro no worries

Step-by-step explanation:

no cap

Answer:

Step-by-step explanation:

It's parallel to the side BC, from a known theorem (the segment linking the midpoints of two sides of a triangle is parallel to the third, and its lenght is half of it.

Answer:

3. f(x) = 5^x

4. f(x) = 3 (8)^x

Step-by-step explanation:

3. Which function represents the data 2=>25, 3=>125, 4 =>625

You just have to plug the values of x in the equations provided and see which one fit, you stop testing for a given equation when it doesn't match the data table.

f(x) = x^4 + 9 - NO

for x = 2, 2^4 + 9 = 16 + 9 = 25 YES

for x = 3, 3^4 + 9 = 81 + 9 = 90 NO, should be 125

f(x) = 4^x + 9 - NO

for x = 2, 4^2 + 9 = 16 + 9 = 25 YES

for x = 3, 4^3 + 9 = 64 + 9 = 73  NO, should be 125

f(x) = x^5 - NO

for x = 2, 2^5 = 32 NO, should be 25

f(x) = 5^x YES

for x = 2, 5^2 = 25  YES

for x = 3, 5^3 = 125  YES

for x = 4, 5^4 = 625  YES

4. Which of the options is equivalent to f(x) = 3(2)^(3x)

By property of the powers you can easily break down the 3x exponent into a much simpler way.

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

From (2)^(3x) we got to 8^x, so the equation can now be written:

f(x) = 3 (8)^x, which is the first choice.

You could easily verify it with x = 2 in each equation.

The sum evaluates to 144. See the linked question in the comments for details.

Answer:

Explanation:

To solve log (−5.6x + 1.3) = −1 − x graphycally, you must graph this system of equations on the same coordinate plane:

1) To graph the equation 1 you can use these features of logarithmfunctions:

        log ( -5.6x + 1.3) = 0 ⇒ -5.6x + 1.3 = 1 ⇒x = 0.3/5.6 ≈ 0.054

       x = 0 ⇒ log (0 + 1.3) = log (1.3) ≈ 0.11

        x            log (-5.6x + 1.3)

        -1           0.8

        -2           1.1

        -3           1.3

2) Graphing the equation 2 is easier because it is a line: y = - 1 - x

3) The solution or solutions of the equations are the intersection points of the two graphs. So, now the graph method just requires that you read the x coordinates of the intersection points. From the least to the greatest, rounded to the nearest tenth, they are:

Answer:

x = -2.1

& .2

Step-by-step explanation:

Answer:

[tex]\$17,500[/tex]

Step-by-step explanation:

Let

x----> that month's sales

y----> October earnings

we know that

[tex]8\%=8/100=0.08[/tex]

[tex]y=0.08x+1,400[/tex] -----> equation A

[tex]y=2,800[/tex] -----> equation B

Equate equation A and equation B and solve for x

[tex]2,800=0.08x+1,400[/tex]

[tex]0.08x=2,800-1,400[/tex]

[tex]x=1,400/0.08[/tex]

[tex]x=\$17,500[/tex]

Final answer:

The salesperson needs to earn an additional $1,400 on top of the base salary to meet the goal, which means they need to sell $17,500 worth of merchandise with an 8% commission rate.

Explanation:

To calculate the amount of merchandise the salesperson must sell to meet the goal of $2,800, we need first to understand how much more money is needed beyond the base salary. The salesperson receives a base salary of $1,400. Since the goal is $2,800, the additional amount needed from commission is $2,800 - $1,400 = $1,400.

With an 8% commission rate, we can set up an equation where the amount of merchandise sold (let's call it x) times the commission rate (0.08) equals the additional amount needed ($1,400). The equation is: 0.08x = $1,400. To find x, divide both sides by 0.08, therefore x = $1,400 / 0.08, which equals $17,500.

So, the salesperson will need to sell $17,500 worth of merchandise to meet the goal of earning $2,800 in October.

The value of ∑n=14[100(−4)n−1] is -5368709100

The sequence is given as:

∑n=14[100(−4)n−1]

The above sequence is a geometric sequence, with the following properties

The sum of n terms of a geometric series is:

[tex]S_n = \frac{a* (r^n - 1)}{r - 1}[/tex]

So, we have:

[tex]S_n = \frac{100* ((-4)^{14} - 1)}{-4 - 1}[/tex]

Evaluate

[tex]S_{14} = -5368709100[/tex]

Hence, the value of ∑n=14[100(−4)n−1] is -5368709100

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The sum [tex]\(\sum_{n=1}^4 [100(-4)^{n-1}]\)[/tex] is [tex]\[\boxed{-5100}\][/tex]

To find the sum [tex]\(\sum_{n=1}^4 [100(-4)^{n-1}]\),[/tex] we will calculate the individual terms of the sequence and then sum them up.

The general term of the sequence is [tex]\(100(-4)^{n-1}\)[/tex]. Let's compute the terms from [tex]\(n = 1\) to \(n = 4\):[/tex]

1. For [tex]\(n = 1\):[/tex]

[tex]\[ 100(-4)^{1-1} = 100(-4)^0 = 100 \cdot 1 = 100 \][/tex]

2. For [tex]\(n = 2\):[/tex]

[tex]\[ 100(-4)^{2-1} = 100(-4)^1 = 100 \cdot (-4) = -400 \][/tex]

3. For [tex]\(n = 3\):[/tex]

[tex]\[ 100(-4)^{3-1} = 100(-4)^2 = 100 \cdot 16 = 1600 \][/tex]

4. For [tex]\(n = 4\):[/tex]

[tex]\[ 100(-4)^{4-1} = 100(-4)^3 = 100 \cdot (-64) = -6400 \][/tex]

Now, let's sum these terms:

[tex]\[100 + (-400) + 1600 + (-6400)\][/tex]

Perform the calculations step-by-step:

1. [tex]\(100 - 400 = -300\)[/tex]

2. [tex]\(-300 + 1600 = 1300\)[/tex]

3. [tex]\(1300 - 6400 = -5100\)[/tex]

Answer: 47+B(.85) = A

Step-by-step explanation:

One bagel = $0.85

Sold 47 today

One bagel(.85) = profit

A = profit

B = additional bagels

47+B(.85) = A

Answer:

the person above me is correct

Step-by-step explanation:

by the way its 8 because 24 words divided by 4 weeks is 8.

The unit rate describing Alan's vocabulary acquisition is 6 words per week.

The unit rate that describes the situation where Alan learned 24 new vocabulary words in 4 weeks is 6 words per week.

To find the unit rate, divide the total number of words learned by the total number of weeks. In this case, 24 words / 4 weeks = 6 words per week.

Answer:

[tex]3,726\ m^{2}[/tex]

Step-by-step explanation:

step 1

Find the scale factor

we know that

If two figures are similar, then the ratio of its corresponding sides is equal to the scale factor

Let

z----> the scale factor

x----> corresponding side of the larger trapezoid

y----> corresponding side of the smaller trapezoid

[tex]z=\frac{x}{y}[/tex]

we have

[tex]x=64\ m[/tex]

[tex]y=12\ m[/tex]

substitute

[tex]z=\frac{64}{12}[/tex]

step 2

Find the area of the larger trapezoid

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z----> the scale factor

x----> area of the larger trapezoid

y----> area of the smaller trapezoid

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

we have

[tex]z=\frac{64}{12}[/tex]

[tex]y=131\ m^{2}[/tex]

substitute

[tex](\frac{64}{12})^{2}=\frac{x}{131}[/tex]

[tex]x=(\frac{4,096}{144})(131)[/tex]

[tex]x=3,726\ m^{2}[/tex]

Answer:

Hello cheaters lol jk, Answer is B.  

Step-by-step explanation:

more interest equals more money, if you divide the amount of the house by 6% and do the same for the other by 5, the amount for B is greater.  

The House A is more worth than House B .

Compound interest is an interest accumulated on the principal and interest together over a given time period. The interest accumulated on a principal over a period of time is also accounted under the principal.

Formula of Compound interest :

[tex]A = P (1+\frac{r}{100} )^{n}[/tex]

Where,

A = Final amount

P = initial principal

r = rate per annum

n = Time in years

According to the question

House A:

Principal = 125260

Rate = 5%

Time in years = 2

Applying Formula of Compound interest for final amount

[tex]A = P (1+\frac{r}{100} )^{n}[/tex]

[tex]A = 125260 (1+\frac{5}{100} )^{2}[/tex]

[tex]A = 125260 (1.05)^{2}[/tex]

A = 138,099.15

House B:

Principal = 120160

Rate = 6%

Time in years = 2

Applying Formula of Compound interest for final amount

[tex]A = P (1+\frac{r}{100} )^{n}[/tex]

[tex]A = 120160 (1+\frac{6}{100} )^{2}[/tex]

[tex]A = 120160(1.06)^{2}[/tex]

A = 135,011.776

Hence , House A is more worth than House B .

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Answer:

im pretty sure its the first one

Answer with explanation:

When the size of Preimage is greater than size of Image than dilation factor will be less than 1 and greater than zero.

And, when Size of preimage is greater than Size of Image than dilation factor will be greater than 1.

In the given diagram

Size of Preimage > Size of Image

Dilation Factor=0 <Dilation factor <1

Option A: It has a scale factor between zero and one and is a reduction.

Answer:

4a + 2b + 1/4 c.

Step-by-step explanation:

1/4(16a+8b+c)

= 1/4 * 16a + 1/4 * 8b + 1/4 * c

= 4a + 2b + 1/4 c.

Final answer:

To apply the distributive property to the expression 1/4(16a+8b+c), we distribute the 1/4 to each term inside the parentheses and simplify the expression.

Explanation:

To apply the distributive property to the expression 1/4(16a+8b+c), we distribute the 1/4 to each term inside the parentheses. This means multiplying 1/4 by 16a, 1/4 by 8b, and 1/4 by c. The distributive property states that a (b + c) = ab + ac. So, the expression becomes:

1/4(16a) + 1/4(8b) + 1/4(c)

Since 1/4 times any number equals the number divided by 4, we can simplify further:

(16a/4) + (8b/4) + (c/4)

Which simplifies to:

4a + 2b + c/4

Answer:

The rule of dilation centered at the origin is (x , y) → (2x , 2y) ⇒ answer A

Step-by-step explanation:

* Lets talk about dilation

- A dilation is a transformation that changes the size of a figure.  

- It can become larger or smaller, but the shape of the

 figure does not change.  

- The scale factor, measures how much larger or smaller  

 the image will be

- If the scale factor greater than 1, then the image will be larger

- If the scale factor between 0 and 1, then the image will be smaller

- The dilation rule for any point (x , y) is (kx , ky), where k is the

  factor of dilation centered at origin

* Now lets solve the problem

- The figure KLMN has for vertices:

  K (3 , -3) , L (3 , 4) , M (5 , 4) , N (5 , -3) ⇒ (1)

- The image K'L'M'N' of figure KLMN after dilation about the origin

  has four vertices:

   K' (6 , -6) , L' (6 , 8) , M' (10 , 8) , N' (10 , -6) ⇒ (2)

- From (1) and (2)

# (3 , -3) ⇒ (6 , -6)

# (3 , 4) ⇒ (6 , 8)

# (5 , 4) ⇒ (10 , 8)

# (5 , -3) ⇒ (10 , -6)

- Each point in KLMN multiplied by 2

∴ The scale of dilation is 2

∴ The rule of dilation centered at the origin is (x , y) → (2x , 2y)

Answer: A) (x, y) → (2x, 2y)

The pre-image is enlarged. The coordinates of KLMN have been multiplied by 2.

Answer:

16.47 in.

Step-by-step explanation:

Add the lengths of the sides:

3.4 in. + 5.75 in. + 7.32 in. = 16.47 in.

The perimeter of the triangle will be equal to 16.47 in. The correct option is B.

Triangle is a shape made of three sides in a two-dimensional plane. the sum of the three angles is 180 degrees.

The perimeter is defined as the sum of all the sides of the figure. The perimeter of the triangle is the sum of all three sides of the triangle.

Given that the three sides of a triangle measure 3.4 inches, 5 inches, and 7.32 inches.

The perimeter of the triangle is calculated as,

P = 3.4 in. + 5.75 in. + 7.32 in.

P = 16.47 in.

Therefore, the perimeter of the triangle will be equal to 16.47 in. The correct option is B.

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Answer:

slope=-1/4

Step-by-step explanation:

point 1: -4,-1

point 2: 0,-2

y1-y2/x1-x2

1/-4

-1/4