Find the inverse of the function.
Y= -3/x+4

Answer:

(a) and (b) are correct but (c) is not correct

Step-by-step explanation: (c) P(nA)*P(nB) + P(nA/nB)

0.20*0.30 + 0.10 = 0.060 + 0.10 = 0.160

[tex]\huge\text{Hey there!}[/tex]

[tex]\mathsf{-5x -10= -20}\\\\\large\text{ADD 10 to BOTH SIDES}\\\mathsf{-5x - 10 + 10 = -20 + 10}\\\\\large\text{SIMPLIFY IT!}\\\mathsf{-5x = -20 + 10}\\\mathsf{-5x = -10}\\\\\large\text{DIVIDE -5 to BOTH SIDES}\\\mathsf{\dfrac{-5x}{-5}= \dfrac{-10}{-5}}\\\\\large\text{SIMPLIFY IT!}\\\mathsf{x = \dfrac{-10}{-5}}\\\\\mathsf{x = 2}\\\\\\\huge\textbf{Therefore, your answer is: \boxed{\mathsf{Option \ A. \ 2}}}\huge\checkmark[/tex]

[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]

~[tex]\frak{Amphitrite1040:)}[/tex]

Answer:

Step-by-step explanation:

In this question we are given with an equation that is -5x - 10 = -20 . And we are asked to find it's solution ( value of x ).

Solution : -

[tex] \longmapsto \qquad \: - 5x - 10 = - 20[/tex]

Step 1 : Adding 10 to both sides :

[tex] \longmapsto \qquad \: - 5x - \cancel{10 }+ \cancel{10} = - \bold{20 }+ \bold{10}[/tex]

On further calculations , We get :

[tex] \longmapsto \qquad \: - 5x = - 10[/tex]

Step 2 : Dividing with -5 on both sides :

[tex] \longmapsto \qquad \: \dfrac{ \cancel{- 5}x}{ \cancel{- 5}} = \cancel{ \dfrac{ - 10}{ - 5} }[/tex]

On further calculations , we get :

[tex] \longmapsto \qquad \: \ \: \pink{\underline{ \boxed{\frak{x = 2}}}}[/tex]

Verifying : -

Now we're verifying our answer by substituting value of x in given equation. So ,

Therefore , our answer is correct .

Answer:

  (n -4)(n +1)^2 = n^3 -2n^2 -7n -4

Step-by-step explanation:

The least common denominator is the smallest denominator that lets you write the sum as a single fraction.

  [tex]\dfrac{n^5}{n^2+2n+1}+\dfrac{-4}{n^2-3n-4}=\dfrac{n^5}{(n+1)^2}+\dfrac{-4}{(n+1)(n-4)}\\\\=\dfrac{n^5}{(n+1)^2}\cdot\dfrac{n-4}{n-4}+\dfrac{-4}{(n+1)(n-4)}\cdot\dfrac{n+1}{n+1}=\dfrac{n^5(n-4)-4(n+1)}{(n+1)^2(n-4)}\\\\=\dfrac{n^6-4n^5-4n-4}{n^3-2n^2-7n-4}[/tex]

The least common denominator is ...

  (n-4)(n+1)^2 = n^3 -2n^2 -7n -4

Answer:

[tex]A = 5 {x}^{2} + 6x + 1[/tex]

Step-by-step explanation:

[tex]A = \frac{(a + b)h}{2} = \frac{(6x - 5 + 4x + 7)(x + 1)}{2} = \frac{(10x + 2)(x + 1)}{2} = \frac{2(5x + 1)(x + 1)}{2} = 5 {x}^{2} + 6x + 1[/tex]

Answer: the rate of the wind is 6.2 mph

Step-by-step explanation:

Let x represent the rate of the wind.

Joe traveled against the wind in a small plane for 3hours. If the speed of the plane in still air is 180 mph, then the total speed with which the plane flew is

(180 - x) mph

Distance = speed × time

Therefore, distance travelled against the wind is

3(180 - x)

= 540 - 3x - - - - - - - - - - - - - -1

The return trip with the wind took 2.8 hours.

the total speed with which the plane flew is

(180 + x) mph

Therefore, distance travelled with the wind is

2.8(180 + x)

= 504 + 2.8x - - - - - - - - - - - - - -2

Since the distance is the same, then

540 - 3x = 504 + 2.8x

540 - 504 = 2.8x + 3x

5.8x = 36

x = 36/5.8 = 6.2

After 10 s, the bucket has rotated [tex]180^{\circ}[/tex]

Step-by-step explanation:

The motion of the bucket on the water wheel is a periodic motion, which means that it repeats itself periodically. The period of the motion is the time it takes for the bucket to returns to its original position: it can be found from the graph by looking at after how much time the graph has again the same shape.

We see that if we  start from x = 0 seconds, then the graph has the same shape again (=it has completed one full cycle) at x = 20 seconds, so the period is

T = 20 s

This also means that in a time of 20 seconds, the bucket has covered a full revolution, so an angle of

[tex]\theta=360^{\circ}[/tex]

Therefore, in order to find how many degrees x the bucket has rotated in

t = 10 s

We  can use the rule of three:

[tex]\frac{\theta}{T}=\frac{x}{t}[/tex]

And solving for x, we find

[tex]x=\frac{\theta t}{T}=\frac{(360)(10)}{20}=180^{\circ}[/tex]

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Answer:

Total magnification of microscope at this setting is 40X

Step-by-step explanation:

Total magnification of microscope is determined by multiplying the magnification power of individual lenses.

So if eyepiece has magnification power of 10X and objective lense has magnification power of 4X , the total magnification of microscope would be

10 × 4 = 40

which means the object will appear 40 times larger than actual object.

The total magnification of the microscope at this setting is 40X.

To determine the total magnification of a compound microscope, one needs to multiply the magnification power of the eyepiece by the magnification power of the objective lens. In this case, the eyepiece has a magnification power of 10X and the objective lens has a magnification power of 4X.

The formula for the total magnification [tex]\( M_{total} \)[/tex] is given by:

[tex]\[ M_{total} = M_{eyepiece} \times M_{objective} \][/tex]

Substituting the given values:

[tex]\[ M_{total} = 10X \times 4X \][/tex]

[tex]\[ M_{total} = 40X \][/tex]

Therefore, the total magnification of the microscope when using the 10X eyepiece and the 4X objective lens is 40X. This means that the image seen through the microscope will appear 40 times larger than its actual size.

Answer:

57

Step-by-step explanation:

(f•g)(x) = f(x)•g(x)

= (4x+3)(2x-5)

= 8x²-20x+6x-15

= 8x²-14x-15

(f•g)(4) = [4(4)+3] [2(4)-5]

= (16+3)(8-5)

= 19 • 3

= 57

Answer:

57

Step-by-step explanation:

got it correct on test. :)

Answer:

So, 22 batches of cookies can the baker make.

Step-by-step explanation:

A baker has 15 cups of flour.

He sets aside 4 cups.

So, the remaining cups = 15 - 4 = 11

A cookie recipe that calls for 1/2 cup of flour.

So, x batches of cookies can the baker make with 11 cups

Use the ratio and proportional

1 : 1/2 = x : 11   ⇒ multiply both sides by 2

2 : 1 = 2x : 22

solve for x

2x = 2 * 22

x = 22

So, 22 batches of cookies can the baker make.

She can make 22 batches of cookies.

Given that there are 15 cups of flour. The baker sets aside 4 cups.

So remaining (15 - 4) = 11 cups.

Let she can make x batches.

Given each batch takes 1/2 cup.

That means she will need [tex]x\cdot\frac{1}{2}=\frac{x}{2}[/tex] cups.

According to the question:

[tex]\frac{x}{2}=11\\x=22[/tex]

So she can make 22 batches of cookies.

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Answer:

[tex]50w+100 \ge 18000[/tex]

Step-by-step explanation:

Each seven-letter word is worth 50 points. [tex]w[/tex] words are then worth [tex]w\times50=50w[/tex].

Since Sal gets 100 points for playing the game, his points total after [tex]w[/tex] words is [tex]50w +100[/tex]. If he wants to break the record, he must get, at least, 18000 points. "At least" in inequality means [tex]\ge[/tex] (just as "at most" means [tex]\le[/tex]). Then the required inequality is

[tex]50w+100 \ge 18000[/tex].

Note that the question says "18000 or more", which is why we used the [tex]\ge[/tex] symbol. If the phrase had been "more than 18000", we would have used [tex]>[/tex].

This does NOT represent a function.

There should only be one pair per input and output, but this graph has multiple.

Answer:

The shark are fed [tex]\frac16 \ ton[/tex] of fish during the night.

Step-by-step explanation:

Given:

Weight of fish fed in the morning = [tex]\frac{2}{15}\ ton[/tex]

Also Given:

During the afternoon feeding the weight of fish fed will be 1/15 of a ton more than the fish fed during the morning.

Weight of fish fed in the afternoon = [tex]\frac{2}{15}+\frac{1}{15}=\frac{2+1}{15}=\frac{3}{15}\ ton[/tex]

Total fish fed in whole day = [tex]\frac12 \ ton[/tex]

We need to find the Weight of fish fed in the night.

Solution:

Now we can say that;

Weight of fish fed in the night can be calculated by by subtracting Weight of fish fed in the morning and Weight of fish fed in the afternoon from Total fish fed in whole day .

framing in equation form we get;

Weight of fish fed in the night = [tex]\frac{1}{2}-\frac{2}{15}-\frac{3}{15}= \frac{1}{2}-(\frac{2}{15}+\frac{3}{15})=\frac{1}{2}-\frac{2+3}{15}= \frac{1}{2}-\frac{5}{15} = \frac{1}{2}-\frac{1}{3}[/tex]

Now we will use LCM for making the denominator common we get;

Weight of fish fed in the night = [tex]\frac{1\times3}{2\times3}-\frac{1\times2}{3\times2} = \frac{3}{6}-\frac{2}{6}[/tex]

Now denominator are common so we will solve the numerators.

Weight of fish fed in the night = [tex]\frac{3-2}{6}=\frac16 \ ton[/tex]

Hence The shark are fed [tex]\frac16 \ ton[/tex] of fish during the night.

Answer: The height of the tree is 12.57 ft.

Step-by-step explanation:

The height of a thing is proportional to the its shadow.

Let H = Height and S = length of shadow

Then by equation direct proportion , [tex]\dfrac{H_1}{S_1}=\dfrac{H_2}{S_2}[/tex]       (i)

Given : A tree that casts a 22 ft shadow at the same time a 4 ft postpost casts a shadow which is 7-ft ​long.

Put [tex]S_1=22 ,\ H_2= 4,\ \ S_2=7[/tex]  in (i), we get

[tex]\dfrac{H_1}{22}=\dfrac{4}{7}\\\\ H_1=\dfrac{4}{7}\times22\approx12.57[/tex]

Hence, the height of the tree is 12.57 ft.

What the user said above!

Answer:

Step-by-step explanation:

Since angle ABD is 133 degrees and the sum of the angles in a triangle is 180 degrees, it means that

m∠ DAB + 133 + 22 = 180

m∠ DAB = 180 - 155 = 25 degrees

Also, ∆ ADC is an isosceles triangle because two of its sides are equal. It also means that the base angles are equal. Thus,

m∠ A = m∠ B

Therefore,

m∠ A + m∠ B + angle D = 180

m∠ A + m∠ B = 180 - 22 × 2

m∠ A + m∠ B = 180 - 44 = 136

m∠ A = m∠ B = 136/2 = 68 degrees

m∠ CAB + m∠ DAB = m∠ A

Therefore,

m∠ CAB = 68 - 25 = 43 degrees

Since ∆ ABC is isosceles, then

m∠ CAB = m∠ ACB

m∠ ACB = 43 degrees

m∠ ABC = 180 - (43 × 2) = 180 - 86

m∠ ABC = 94 degrees

m∠ BCD = 68 - m∠ ACB

m∠ BCD = 68 - 43 = 25 degrees

Answer:

C. 2

Step-by-step explanation:

Given:

[tex]\frac{5}{12}x-\frac12=\frac13[/tex]

We need to solve the equation to find the value of x.

Solution:

[tex]\frac{5}{12}x-\frac12=\frac13[/tex]

Combining like terms we get;

[tex]\frac{5}{12}x=\frac13+\frac12[/tex]

Now Using LCM for making the denominators same we get;

[tex]\frac{5}{12}x=\frac{1\times2}{3\times2}+\frac{1\times3}{2\times3}\\\\\frac{5}{12x}=\frac{2}{6}+\frac{3}{6}[/tex]

Now Denominators are common so we solve the number we get;

[tex]\frac{5}{12}x=\frac{2+3}{6}\\\\\frac{5}{12}x=\frac{5}{6}[/tex]

Now Dividing both side by [tex]\frac{12}{5}[/tex] we get;

[tex]\frac{5}{12}x\times \frac{12}{5}=\frac{5}{6}\times \frac{12}{5}\\\\x=2[/tex]

Hence the value of x is 2.

Answer:

94

Step-by-step explanation:

Jen has

Answer:

Reflection about either the x- axis or y- axis.

Step-by-step explanation:

It is likely that the triangle shows a mirror image when it has been rotated at point C so that it matches ΔADC.

The triangles are congruent if the sides and angles are equal. The only way to effect the change is through a rotation.

In fact, two objects are said to be congruent if they can be transformed into another shape by translation, rotation, and reflection.

The resulting image is a distinct figure that can fit and match the other completely.

In this case, the triangle is rotated through 180⁰ so the resulting image is a reflection or mirror image.

Answer:

If two pairs of angles and the included side are congruent, the triangles are congruent.

Step-by-step explanation:

itsLearning

To find the difference in the total number of glue sticks that Mr. Davis and Ms. Wilson purchased, subtract the number of glue sticks each person bought from one another.

To find the difference in the total number of glue sticks that Mr. Davis and Ms. Wilson purchased, we can subtract the number of glue sticks each person bought from one another.

Mr. Davis bought 5 packages of glue sticks, and each package has a certain number of glue sticks in it.

Ms. Wilson bought 8 packages of glue sticks, and each package also has a certain number of glue sticks in it.

To find the difference, subtract the total number of glue sticks from Mr. Davis from the total number of glue sticks from Ms. Wilson.

For example, if each package of glue sticks contains 4 glue sticks, Mr. Davis purchased 5 x 4 = 20 glue sticks. Ms. Wilson purchased 8 x 4 = 32 glue sticks. The difference is 32 - 20 = 12 glue sticks.

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Answer:

The correct answer for this equational ratio is x = 5

Step-by-step explanation:

In order to calculate for x, we must create the necessary ratios

[tex]\frac{16}{20} = \frac{45-5x}{5x}[/tex]

Cross multiply to get

900 - 100x = 80x

900 = 180x

x = 5

Answer: the length of Maria's piece of string is 45 inches.

the length of Katy's piece of string is 39 inches

Step-by-step explanation:

Let x represent the length of Maria's piece of string.

Let y represent the length of Katy's piece of string.

When they put the two pieces of string together end to end, the total length is 84inches. This means that

x + y = 84 - - - - - - - - - - - -1

Maria's string is 6 inches longer than Katy's. This means that

x = y + 6

Substituting x = y + 6 into equation 1, it becomes

y + 6 + y = 84

2y + 6 = 84

2y = 84 - 6 = 78

y = 78/2 = 39

x = y + 6 = 39 + 6

x = 45

Answer:

δhsoln will be close to zero.

Step-by-step explanation:

In calculus, the symbol d represents a large or significant increment in a value. For example, say the change in the volume of a liquid in a tank depends upon the change of the height h.

The above statement can be written like this:

dV/dh

This means that the volume of the tank (V) depends with a significant change in the height of the liquid (h).

It is also possible to compute small changes in physical quantities. The symbol δ simply presents a small increment or small change. Using the same expression above, if a very large tank was to have a very very small leak, the change would be: δV/δh

In other words, the change in the volume will be almost negligible and will be close to zero.  

Final answer:

By substituting x with 14 in each option, it is determined that option D, which is f(x) = x + 9, is the correct function where f(14) equals 23.

Explanation:

The student is asking to find the function for which f(14)=23. To answer this, we substitute x with 14 in each of the given options and see which one results in f(x) being equal to 23.

Substitute x=14 in f(x)=12x−20: f(14)=12(14)−20=168−20=148, which is not 23.

Substitute x=14 in f(x)=14x+23: f(14)=14(14)+23=196+23=219, which is not 23.

Substitute x=14 in f(x)=3x−7: f(14)=3(14)−7=42−7=35, which is not 23.

Substitute x=14 in f(x)=x+9: f(14)=14+9=23, which is the correct answer.

The correct function is D. f(x)=x+9.

Answer:

The higher you go in the good chain the lower the population.

Explanation:

In the food web, there are only a few sharks since in the food chain they are higher. Just 10% energy is retained in the tissues once the energy is moved from one trophic level to another, and the leftover power is emitted as metabolic energy.

If an animal is high up the energy ladder, the individual has less resources; thus, a few of the highest predators are present in an ecosystem.

Answer:

because there are more sharks than seals in the area

Step-by-step explanation:

Answer:

  64

Step-by-step explanation:

10 ft is 4 times 2 1/2 ft, so the larger container has dimensions of 4 crates in every direction. That is, it will hold 4^3 crates, or 64 crates.

Answer: Total amount invested in both accounts is $1875

Step-by-step explanation:

Let x represent the amount invested at 11%.

Let y represent the amount invested at 5%.

She invests four times as much in an account paying 11% as she does in an account paying 5%. This means that

x = 4y

The formula for determining simple interest is expressed as

I = PRT/100

Where

P represents the principal

R represents the rate of investment

T represents the time in years.

Considering the amount invested at 11%,

I = (x × 11 × 1)/100 = 0.11x

Considering the amount invested at 5%,

I = (y × 5 × 1)/100 = 0.05y

If she earns $183.75 in interest in one year from both accounts combined, it means that

0.11x + 0.05y = 183.75 - - - - - - - - - -1

Substituting x = 4y into equation 1, it becomes

0.11 × 4y + 0.05y = 183.75

0.44y + 0.05y = 183.75

0.49y = 183.75

y = 183.75/0.49

y = 375

x = 4y = 375 × 4

x = 1500

Total amount invested in both accounts is

1500 + 375 = $1875

Amy invested a total of $1875 in both simple interest accounts. She placed $375 into the account with a 5% interest rate and $1500 into the account with an 11% interest rate to achieve the total interest income of $183.75 in one year.

Amy invests money in two simple interest accounts. One account pays 11% interest, while the other pays 5%. If she puts four times as much into the 11% account as the 5% account, we can set up the following equations to find out how much she invested altogether:

We can use the formula for simple interest which is Interest = Principal × Rate × Time, where the principal is the initial amount of money invested, the rate is the interest rate, and the time is the period of time over which the money is invested.

So, the total interest earned from both accounts is:

Interest from 5% account + Interest from 11% account = $183.75

(x × 0.05 × 1) + (4x × 0.11 × 1) = $183.75

0.05x + 0.44x = $183.75

0.49x = $183.75

Now, solve for x:

0.49x = $183.75

x = $183.75 / 0.49

x = $375

Since x represents the amount invested at 5%, Amy invested $375 in the 5% account. To find the total investment:

Total investment = x + 4x

Total investment = $375 + 4(×$375)

Total investment = $375 + $1500

Total investment = $1875

Answer: d. 25

Step-by-step explanation:

Let x be the total number of students in the class.

As per given :

Number of students want ice cream party = 20% of x= 0.20x

[we divide percent by 100 to convert it into decimal.]

Actual number of students want ice cream party =5

⇒  0.20x=5

Divide both sides by 0.20 , we get

⇒ x=  [tex]\dfrac{5}{0.20}=\dfrac{500}{20}=25[/tex]

Hence, the total number of students in the class.= 25

Thus , the correct answer is d. 25

The temperature at 10 pm was -1 degree.

To find the temperature at 10 pm, we need to start with the temperature at 8am. Since the temperature was 3 degrees below zero at 8 am, we can add the rise of 14 degrees by 1 am to get the temperature at 1 am. Then, we need to subtract the 12 degree drop by 10 pm to find the temperature at that time.

Starting with 8 am: -3 degrees

Add 14 degrees: -3 + 14 = 11 degrees at 1 am

Subtract 12 degrees: 11 - 12 = -1 degree at 10 pm

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Yo sup??

This question can be solved by applying the properties of similar triangles

the triangle with sides 5x and 20 is similar to the triangle with sides 45 and 36

therefore we can say

5x/45=20/36

x=5 units

Hope this helps

(13x6)+89 with the power of 2 is 7999