A couple took a small airplane for a flight to the wine country for a romantic dinner and then returned home. The plane flew a total of 5 hours and each way the trip was 233 miles. If the plane was flying at 170 miles per hour, what was the speed of the wind that affected the plane?

A Couple Took A Small Airplane For A Flight To The Wine Country For A Romantic Dinner And Then Returned

Answers

Answer 1

Answer:

114.26 miles per hour

Explanation:

Let us call

v = wind speed

Then

speed with the wind = 170 + v

speed against the wind = 170 -v

Therefore,

The time taken on the outward journey ( with the wind):

[tex]\frac{233}{170+v}[/tex]

Time take on the return journey

[tex]\frac{233}{170-v}[/tex]

These two times must add up to 5 hours, the total time of the journey.

[tex]\frac{233}{170+v}+\frac{233}{170-v}=5[/tex]

Solving the above equation for v will give us the wind speed.

The first step is to find the common denominator of the two rational expressions. We do this by multiplying the left rational expression by (180-v)/(180-v) and the right expression by (180 + v)/(180 + v).

[tex]\frac{170-v}{170-v}*\frac{233}{170+v}+\frac{233}{170-v}*\frac{170+v}{170+v}=5[/tex][tex]\frac{233(170-v)+233(170+v)}{(170-v)(170+v)}=5[/tex]

Dividing both sides by 233 gives

[tex]\frac{(170-v)+(170+v)}{(170-v)(170+v)}=\frac{5}{233}[/tex]

The numerator on the left-hand side of the equation simplifies to give

[tex]\frac{2\times170}{(170-v)(170+v)}=\frac{5}{233}[/tex][tex]\Rightarrow\frac{340}{(170-v)(170+v)}=\frac{5}{233}[/tex]

Expanding the denominator gives

[tex]\operatorname{\Rightarrow}\frac{340}{170^2-v^2}=\frac{5}{233}[/tex][tex]\frac{340}{28900-v^2}=\frac{5}{233}[/tex]

Cross multipication gives

[tex]5(28900-v^2)=340\times233[/tex]

Dividing both sides by -5 gives

[tex]v^2-28900=-\frac{340\times233}{5}[/tex][tex]v^2-28900=-15844[/tex]

Adding 28900 to both sides gives

[tex]v^2=13056[/tex]

Finally, taking the sqaure root of both sides gives

[tex]\boxed{v=114.26.}[/tex]

Hence, the speed of the wind, rounded to two decimal places, was 114.26 miles per hour.


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Based on the types of correlation, we can see that the best description of the data given is a positive correlation.

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A hose for the hot tub at a rate of 3.61 gallons per minute. How many hours will it take to fill a 345 gallon hot tub?

Answers

We have a 345 gallon hot tub that fills at a rate of 3.61 gallons/min.

To calculate filling time, we need to divide as it follows:

[tex]t=\frac{345\text{gal}}{3.61\frac{\text{gal}}{\min }}[/tex]

in that way we can find how much time does it take in minutes

[tex]t=\frac{345}{3.61}=95.56786[/tex]

now, if we want to determine time in hours, we must divide by 60, because there are 60 min. in one hour.

[tex]t=\frac{345}{3.61}\cdot\frac{1}{60}=1.59279[/tex]

Then, it would take approximately 1.59 hours to fill the hot tub.

Questionf(2)Find R(2) where f(2)g(2)x² – a- 2 - 3010x + 100and g(2)-22 – 5x + 6611x + 110(Simplify your answer.)Provide your answer below:

Answers

Answer:

Given that,

To find,

[tex]R(x)=\frac{f(x)}{g(x)}[/tex]

where,

[tex]f(x)=\frac{x^2-x-30}{10x+100}[/tex][tex]g(x)=\frac{-x^2-5x+66}{11x+110}[/tex]

Simplifing f(x) and g(x), we get

[tex]f(x)=\frac{x^2-x-30}{10x+10)}=\frac{x^2-6x+5x-30}{10(x+10)}[/tex][tex]=\frac{x(x-6)+5(x-6)}{10(x+10)}=\frac{(x-6)(x+5)}{10(x+10)}[/tex][tex]f(x)=\frac{(x-6)(x+5)}{10(x+10)}-----(1)[/tex]

This is the simplified form of f(x).

For g(x) we get,

[tex]g(x)=\frac{-x^2-5x+66}{11x+110}=\frac{x^2+5x-66}{-11(x+10)}[/tex][tex]=\frac{x^2+11x-6x-66}{-11(x+10)}=\frac{x(x+11)-6(x+11)}{-11(x+10)}[/tex][tex]g(x)=\frac{(x+11)(x-6)}{-11(x+10)}------(2)[/tex]

[tex]\frac{i}{g(x)}=\frac{-11(x+10)}{(x+11)(x-6)}[/tex]

Now To find R(x), we get

[tex]R(x)=\frac{f(x)}{g(x)}=f(x)\times\frac{1}{g(x)}[/tex][tex]=\frac{(x-6)(x+5)}{10(x+10)}\times\frac{-11(x+10)}{(x+11)(x-6)}[/tex][tex]=\frac{-11(x+5)}{10(x+11)}[/tex]

we get,

[tex]R(x)=\frac{-11(x+5)}{10(x+11)}[/tex]

Answer is:

[tex]R(x)=\frac{-11(x+5)}{10(x+11)}[/tex]

I need help with part b please

Answers

we have that

interval (-infinite,0) ------> f(x)=5x+4

interval [0, infinite) ------> f(x)=x+7

Part B

f(0)

For x=0 ------> belong to the interval [0, infinite)

so

f(x)=x+7

substitute

f(0)=0+7

f(0)=7

Part C

f(3)

For x=3 ---> belong to the interval [0, infinite)

so

f(x)=x+7

substitute

f(3)=3+7

f(3)=10

I need help ASAP please can you help you help

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OPTION C

A quartic function is a fourth-degree polynomial: a function that has, as its highest order term, a variable raised to the fourth power.

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What is the probability of rolling a die (ordinary, 6-sided die with numbers 1, 2,3, 4, 5, 6) and getting a 7?

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Question 3 Olivia is making pancakes for breakfast. The recipe calls for 0.5 quart of milk and 2.5 cups of flour. She has quart of 3/8 quart of milk and 18/8 cups of flour. Olivia makes the recipe with the milk and flour she has. Explain her error. Hint: Convert all of them to either decimal or fraction so that you can compare the values. Challenge: How much more or less milk does Olivia need? How much more or less flour does Olivia need?

Answers

ANSWER and EXPLANATION

The recipe calls for 0.5 quart of milk and 2.5 cups of flour.

She has 3/8 quart of milk and 18/8 cups of flour.

To know the error she made, we have to find the ratio of milk to flour in the recipe and the ratio of milk to flour that she used and see if the ratios are the same.

RECIPE

Ratio of milk to flour is:

[tex]\begin{gathered} 0.5\text{ : 2.5} \\ \Rightarrow\text{ 1 : 5} \end{gathered}[/tex]

That is the ratio of milk to flour.

USED BY OLIVIA

Ratio of milk and flour that she used is:

[tex]\begin{gathered} \frac{3}{8}\text{ : }\frac{18}{8} \\ =>\text{ 3 : 18} \\ \Rightarrow\text{ 1 : 6} \end{gathered}[/tex]

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Answer:

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Answers

Answer:

(x+4)(x-5)

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Second order polynomial in the following format:

ax² + bx + c = 0

Has roots x¹ and x².

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(x - x¹)(x - x²)

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please help. due today! will mark as brainliest!

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Answer:

which question you want to be answered

Answer:

[tex]\textsf{13.\;a)}\quad d=\dfrac{P}{0.5 \pi +1}[/tex]

[tex]\textsf{13.\;b)}\quad d=14\; \sf inches[/tex]

Step-by-step explanation:

Question 13

The perimeter, P inches, of a semicircle of diameter, d inches, is represented by the equation:

[tex]\boxed{P=0.5 \pi d+d}[/tex]

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To express d in terms of P, rearrange the equation to isolate d.

Factor out the common term d from the right side of the equation:

[tex]\implies P=d(0.5 \pi +1)[/tex]

Divide both sides by (0.5π + 1):

[tex]\implies \dfrac{P}{0.5 \pi +1}=\dfrac{d(0.5 \pi +1)}{0.5 \pi +1}[/tex]

[tex]\implies \dfrac{P}{0.5 \pi +1}=d[/tex]

[tex]\implies d=\dfrac{P}{0.5 \pi +1}[/tex]

Part (b)

Given:

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[tex]\implies d=14[/tex]

Therefore, the diameter is 14 inches.

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Answers

a For any relation to be a function, an independent variable x cannot produce different dependent varible y

From the table,

when x = 5, y = 2

Also, when x = 5, y = 5

and when x = 5, y = 7

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Answers

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Write each equation in slope intercept form. Then graph .

Answers

ANSWER

EXPLANATION

Given;

[tex]y=-\frac{5}{6}x+4[/tex]

Recall, the general formula for slope - intercept form is;

[tex]\begin{gathered} y=mx+c \\ m=slope \\ c=y-intercept \end{gathered}[/tex]

comparing the given equation with the standard slope intercept form formula;

[tex]\begin{gathered} y=mx+c \\ y=-\frac{5}{6}x+4 \\ m=-\frac{5}{6} \\ c=4 \end{gathered}[/tex]

Hence, the graph of the given equation is;

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Answers

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I need the answer but i also need to check my answer after

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[tex]\begin{gathered} 7=\frac{x-8}{3} \\ \end{gathered}[/tex]

solving for x:

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Answers

Question:

Solution:

Let the following trigonometric equation:

[tex]2\sin (x)+\sqrt[]{3}=\text{ 0}[/tex]

Subtract the root of 3 from both sides of the equation:

[tex]2\sin (x)=-\sqrt[]{3}[/tex]

solve for sin(x):

[tex]\sin (x)=\text{ -}\frac{\sqrt[]{3}}{2}[/tex]

Applying the trigonometric circle on the given interval, we obtain that the correct answer is:

[tex]x\text{ = }\frac{4\pi}{3}\text{ , x = }\frac{5\pi}{3}[/tex]

please need a answer

Answers

Answer:

ok you can ask

Step-by-step explanation:

don't forget to follow rate like

What is the multiplicity of each of the roots of this graph?2

Answers

SOLUTIONS

What is the multiplicity of each of the roots of this graph?

[tex]f(x)=2x^4+12x^3+16x^2-12x-18[/tex]

Factorise f(x) by the options

(a) According to the option we have -3 is a root of so x+3 is a factor

[tex]\frac{2x^4+12x^3+16x^2-12x-18}{x+3}=2x^3+6x^2-2x-6[/tex]

(b) 1 is a root too so x - 1 is a factor

[tex]\frac{2x^3+6x^2-2x-6}{x-1}=2x^2+8x+6[/tex]

[tex]\begin{gathered} 2x^2+8x+6=2(x+3)(x+1) \\ f(x)=2(x+3)^2(x+1)(x-1) \end{gathered}[/tex]

Therefore the correct answer = Option A

Where x is the horizontal distance in feet from the point at which the ball is thrown.How far from the child does the ball strike the ground?

Answers

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Answers

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h = hour

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Answers

Here we have the following parabola:

[tex]y=-x^2-4x-8[/tex]

To find the vertex, we could use the following formula:

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Where a, b and c are the coefficients of the quadratic function:

[tex]y=ax^2+bx+c[/tex]

As you can see, in this problem a = -1 , b = -4 and c = -8. Thus,

[tex]V(x,y)=V(\frac{-(-4)}{2(-1)},\frac{-(-4)^2}{4(-1)}-8)[/tex]

This is:

[tex]V(-2,-4)[/tex]

Then, the vertex of the parabola is (-2,-4)

The axis of symmetry of the parabola is the line x=-2. Since the vertex is situated at the coordinates (-2,-4), that means that the parabola is symmetrical around this line.

The vertex is maximum point of the parabola.

The range, is defined as all the values that the y-axis could take. If we notice, that is:

[tex](-\infty,-4\rbrack[/tex]

I'm going to upload a picture of the parabola:

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