Flying against the wind, a jet travels 2920 miles in 4 hours. Flying with the wind, the same jet travels 7140 miles in 6 hours. What is the rate of the jet in still air and what is the rate of the wind

Answers

Answer 1

Answer:

Velocity in still air is = 960 miles per hour  

Velocity of wind  = 230 miles per hour.

Step-by-step explanation:

The velocity when flying against the wind = 2920 / 4 = 730 miles per hour.

The velocity when flying with the wind = 7140 / 6 = 1190

Let the rate of jet in still Air = x

Let the rate of jet in wind = y

Therefore, velocity against wind = x-y and wind = x + y

x - y = 730

x + y = 1190

Add both equation, 2x = 1920

x = 960

Now find the value of “y” = 1190 – 960 = 230

Thus, velocity in still air is = 960 miles per hour  

Velocity of wind  = 230 miles per hour.

Answer 2

Answer:

Rate of jet in still air = 960 miles/ hr

Rate of the wind = 230 miles/ hr

Step-by-step explanation:

Let the speed of jet in still air = [tex]u[/tex] miles/hr

Let the speed of air = [tex]v[/tex] miles/hr

So, against the wind, the resultant speed = [tex](u-v)[/tex] miles/hr

And, with the wind, the resultant speed = [tex](u+v)[/tex] miles/hr

Distance traveled against the wind = 2920 miles

Time taken against the wind = 4 hrs

Formula for distance is:

[tex]\bold{Distance =Speed \times Time}[/tex]

[tex]2920 = (u-v)\times 4\\\Rightarrow u-v=\dfrac{2920}{4}\\\Rightarrow u-v=730\ miles/hr...... (1)[/tex]

Distance traveled with the wind = 7140 miles

Time taken against the wind = 6 hrs

[tex]\bold{Distance =Speed \times Time}[/tex]

[tex]7140 = (u+v)\times 6\\\Rightarrow u+v=\dfrac{7140}{6}\\\Rightarrow u+v= 1190 \ miles/hr...... (2)[/tex]

Adding (1) and (2):

[tex]2u = 1920\\\Rightarrow \bold{u = 960 miles/hr}[/tex]

Putting [tex]u[/tex] in (1):

[tex]960 -v = 730 \\\Rightarrow \bold{v=230\ miles/hr}[/tex]

Therefore, the answer is:

Rate of jet in still air = 960 miles/ hr

Rate of the wind = 230 miles/ hr


Related Questions

(pls answer asap!!!) a river is at -150 feet below sea level. a nearby mountain has an elevation of 1350 feet. if Tina hikes from the river to the top of the mountain, how many feet has she hiked?​

Answers

Answer:

1200 feet

Step-by-step explanation:

Answer:

The correct answer to this question is 1200 feet

Step-by-step :

If you're starting at -150, It would take exactly 1200 feet to go from -150 feet to 1350 feet . Here's your answer : Tina hiked 1200 feet to reach the top of the mountain

What is the degree of the following polynomial?

4y3 + 3y2 - y5
2
3
4
5

Answers

Answer:

5

Step-by-step explanation:

The degree of a polynomial simply means what the highest power of an variable is. In this case we see that y⁵ < y³ < y², so 5 would be our highest exponent and answer.

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{5}}}}}[/tex]

Step-by-step explanation:

In the polynomial with one variable , highest power ( exponent ) is the degree of the polynomial.

In polynomial [tex] \sf{4 {y}^{3} + 3 {y}^{2} - {y}^{5} }[/tex]

The power of 4y in the first term = 3

The power of 3y in the second term = 2

The power of y in the third term = 5

Since, the highest power is 5 , the degree of the polynomial is 5 .

Hope I helped!

Best regards!!

Binomial (-2x – 8) and trinomial (-3x2 + 4x + 5) are the factors of which polynomial?
A-3y2 + 2x - 3
O. B. -3x38x2.42x - 40
C 6x + 24x2.50% - 40
O. D 6x3 + 16x2 - 42x - 40

Answers

Answer:

D

Step-by-step explanation:

-2x × -3x^2 +-2x ×4x +-2x×5 +-8×-3x^2 + -8×4x+ -8×5

6x^3-8x^2-10x+24x^2-32x-40

6x^3+16x^2-42x-40

what’s the answer ?

Answers

Answer:

EF = 34

Step-by-step explanation:

EF + FG = EG , substitute values

17x + 3x + 7 = 18x + 11, that is

20x + 7 = 18x + 11 ( subtract 18x from both sides )

2x + 7 = 11 ( subtract 7 from both sides )

2x = 4 ( divide both sides by 2 )

x = 2

Thus

EF = 17x = 17(2) = 34

Answer:

34

Step-by-step explanation:

g First, you need to find the value of x. To do this you need to add the lengths of EF and FG and set it equal to the total length of EG, then solve.

EF=17x, FG= 3x+7, EG = 18x+11

17x+3x+7=18x+11

Combine like terms.

20x+7=18x+11

-7          -18x

Isolate x.

2x = 4

Divide both sides by 2.

x=2

Now that we have the value for x, we need to plug it into the length of EF to find the numerical value.

17x = 17(2) = 34

I have a question about my math homework : transform y=k(x) by translating it down 3 units. Lable the new function p(x) . What happens to the y-coordinate in each new ordered pair?

Answers

Answer:

We have the function y = k(x).

We want to define a new function p(x), such that is equal to k(x) but translated down 3 units.

When we have a general case of a function y = f(x), the function g(x) = f(x) + A is a translation of A units up (if A is positive) or A units down (if A is negative).

Then if we want to go 3 units up, we should have:

p(x) = k(x) + 3.

So now our points are:

(x, y) = (x, p(x)) = (x, k(x) + 3)

So for all the points the y-coordinate has ben mooved 3 units up.

find the product "please answer i will mark you brainlist

Answers

Answer: -48x³y^4 (the option at the bottom left)

Step-by-step explanation:

 -6x²y × 8y³x

=-48x³y^4 ⇔ multiplication in exponents with same base works as addition

Hope this helps!! :)

Please let me know if you have any question

Brainliest!!!!!!!!!!!!!!!!! You want to fence in a pool and deck area. Find the expression which correctly determines the amount of fencing required to complete the job.

Answers

Answer:

The correct expression should be..

5x^2+3x

Step-by-step explanation:

You want to add the variables of the same kind like put all the numbers together, x^2 together, and the x in one too.

-10       1x^2         2x

+10       1x^2         1x

+5         1x^2

+5         2x^2

-10

___________________

0            5x^2         3x

Evaluate. 4\7+3\4 A 37\56 B 1 9\28 C 3\7 D 7\11

Answers

Answer:

The answer is D. 7/11 it's just simple addition.

How many solutions does the system have?
6x - y= -1
6x + y = -1
Choose 1 answer
A. Exactly one solution
B. No solutions
C. Infinitely many solutions

Answers

Answer:

A) exactly one solution-(-1/6,0)

Step-by-step explanation:

6x-y=-1

6x+y=-1

First, use elimination and cancel out the y-values:

you would get: 12x=-2

Divide both sides by 12: (12x/12)=(-2/12)--x=-1/6

x=-1/6

Now, subtitute the x-value into tje first equation to find the y-value:

6(-1/6)-y=-1

-1-y=-1

-1+1-y=-1+1

-y=0

-y/-1=0/-1

y=0

y=0

What value of x makes the equation 2x+14=-6+12x true

Answers

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \bold{ \sf{x = 2}}}}}}[/tex]

Step-by-step explanation:

[tex] \sf{2x + 14 = - 6 + 12x}[/tex]

Move 12x to left hand side and change it's sign

⇒[tex] \sf{2x - 12x + 14 = - 6}[/tex]

Move 14 to left hand side and change it's sign

⇒[tex] \sf{2x - 12x = - 6 - 14}[/tex]

Collect like terms

⇒[tex] \sf{ - 10x = - 6 - 14}[/tex]

Calculate

⇒[tex] \sf{ - 10x = - 20}[/tex]

Divide both sides of the equation by -10

⇒[tex] \sf{ \frac{ - 10x}{ - 10} = \frac{ - 20}{ - 10} }[/tex]

Calculate

⇒[tex] \sf{x = 2}[/tex]

Hope I helped!

Best regards!!

PLEASE HELP I'M STUCK IN THIS PROBLEM

Answers

Answer:

6

Step-by-step explanation:

find two numbers with a sum of 129 and a difference​

Answers

Step-by-step explanation:

100+29=129

Its so simple....

what does the line on top mean? it's confusing. The others don't have it​

Answers

The answer is repeating.

Find FH
HELP ME PLASE

Answers

22-15=7
The answer is 7
The Answer should be 7

Use trigonometry to resolve the following vectors into components. Describe the vectors using vector
notation

Answers

Answer:

  v ≈ (3.28512, 20.74146)

Step-by-step explanation:

  v = 21(cos(81°), sin(81°))

  v ≈ (3.28512, 20.74146) . . . . (x, y) components

The notation varies among authors. The vector can be written as ...

  (r, θ) = (21, 81°)

  r∠θ = 21∠81°

  r cis θ = 21 cis 81°

  v = 21·e^(i·9π/20)

  (x, y) ≈ (3.28512, 20.74146)

  v =  3.28512i +20.74146j . . . . perhaps this is the vector notation you want (i and j are unit vectors in the x- and y-directions, respectively)

The lowest temperature on a winter morning was –8$F. Later that same day the temperature reached a high of 24$F. By how many degrees Fahrenheit did the temperature increase?

Answers

Answer:

32 Fahrenheit

Step-by-step explanation:

Since it is -8, subtract -8.

Now, you have 0 Fahrenheit.

Then, you add 24, since the high was -24 Fahrenheit.

The total number you added and subtracted is 32 Fahrenheit.

Hope this helps!

One more than the quotient of a number x and four

Answers

Answer:

x/4+1

Step-by-step explanation:

Because it says one more than the quotient, we are dealing with addition and division. 1 more means plus 1.  The quotient of a number x and 4 means the answer to the division problem of x and 4. This means x/4. Then add all parts of the problem to get x/4 +1


What is the probability that a randomly selected permutation of the letters A, A, C, C, L, L, O, R, T, U would spell "calculator"?

Answers

Answer:

See explanation

Step-by-step explanation:

Total number of letters = n! = 10

Permutation for 10 letters = n!

                                          = 10!

                                          = 10*9*8*7*6*5*4*3*2*1

                                          = 3628800

From n letters:

Number of A = 2

Number of C = 2

Number of  L = 2

A₁, A₂, C₁, C₂, L₁, L₂, O, R, T, U

Out of 3628800 permutations the word calculator can be spelled as:

C₁ A₁ L₁ C₂ U L₂ A₂ T O R

C₂ A₂ L₂ C₁ U L₁ A₁ T O R

and so on

So total number of different permutations are  

(permutation of number of letters) / permutation of (number of As * number of Cs * number of Ls)

  =  10! / (2! 2! 2 !)  

  = 10*9*8*7*6*5*4*3*2*1 / (2*1) (2*1) (2*1)

  = 3628800 / 2 * 2 * 2

  =  3628800 / 8

  =   453600

Hence probability that a randomly selected permutation of the letters A, A, C, C, L, L, O, R, T, U would spell "calculator" is:

 1 / total number of different permutations  

= 1 / 10! / (2! 2! 2 !)  

= 1/453600

= 0.000002

dealing with inequalities.
-3x+3<6​

Answers

Answer:

Step-by-step explanation:

-3x+3<6​

-3x=3

x=-1

Answer:

-1 or -x (Same thing...)

Step-by-step explanation:

6-3=3

3/-3=-x

-x=-1

-1

Slopes of parallel line are
A.reciprocal
B.opposite reciprocals
C. Identical
D.opposites

Answers

Answer:

the solution is C. identical

Step-by-step explanation:

slope of parallel lines are the same

Answer:

the slopes of parallel lines are : C. identifical

4. Kennedy buys a computer that was reduced in a sale by 10%. If the sale price of the
computer is now N$11 480. 50, what was the original price of the computer?
What is the answer

Answers

Answer:

11480.50 x 110% = 12628.55

Step-by-step explanation:

100% is the current price (11480.50), the current price has already been discounted by 10%.

so now add the the amount deducted back into the current price (100% +10%) to find the initial price.

change 45/8 to mixed fraction​

Answers

Answer: 5 and 5/8

Step-by-step explanation: To write an improper fraction as

a mixed number, we divide the denominator into the numerator.

So in this problem, we divide 8 into 45.

8 divides into 45 five times with a remainder of 5.

Also, the denominator of the improper fraction

will become the denominator of the mixed number.

So we have 5 and 5/8

The fraction 45/8 is equal to the mixed fraction 5 5/8.

How to write it as a mixed fraction?

To convert the fraction 45/8 into a mixed fraction, follow these steps:

Step 1: Divide the numerator (45) by the denominator (8) to determine the whole number part of the mixed fraction.

45 ÷ 8 = 5 with a remainder of 5

Step 2: The quotient obtained in Step 1, 5, represents the whole number part of the mixed fraction. The remainder, 5, becomes the new numerator.

Step 3: Write the mixed fraction using the whole number, numerator, and denominator.

The mixed fraction is 5 5/8.

Learn more about fractions:

https://brainly.com/question/11562149

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x+3=44 The sum of a number and three is forty-one. Find the number.

Answers

41 it’s really simple you just subtract 3 from 44 and it’s 41

!!!! HELPPP NOWWW PLSSS ITS DUE IN 1 HOUR !!!!!!

Answers

Answer:

The last one is the answer

Step-by-step explanation:

Answer: -4x+15x+30=-36

Predict what will happen to the coordinates of a point (x,y) as the point rotates counterclockwise (CCW) about the origin to produce point (x’,y’). Choose rotation angles of 90 degrees, 180 degrees, and 360 degrees. Express your answer in terms of x and y. Be sure to watch your signs.

Answers

Answer:

Step-by-step explanation:

If a point (x, y) is rotated counterclockwise by the angles given in the table attached,

Rule for the rotation at an angle of 90° CCW about the origin,

(x, y) → (-y, x)

Rule for the rotation at an angle of 180° CCW about the origin,

(x, y) → (-x, -y)

Rule for the rotation at an angle of 270° CCW about the origin,

(x, y) → (y, -x)

Rule for the rotation at an angle of 360° CCW about the origin,

(x, y) → (x, y)

Angle of rotation         x'         y'

90°                               -y         x                          

180°                              -x        -y

270°                              y        -x

360°                              x         y

Answer:

Angle of Rotation (CCW) x′ y′

90°   −y x

180°  −x −y

270°   y −x

360°        x   y

Jim ran 15 miles in 5 days. At this rate, how many days will it take Jim to run 165 miles?

Answers

Answer:

55 days

Step-by-step explanation:

Given

Jim ran 15 miles in 5 days

no. of miles ran in 5 days = 15 miles

dividing LHS and RHS by 5

no. of miles ran in 5/5(=1) days = 15/5 miles = 3 miles

no. of miles ran in 1 day =  3 miles

let the no. of days taken to run 165 miles be x   ----A

No of miles ran in x days = x*no. of miles ran in 1 day = 3x miles

thus,  From A

3x  = 165

x = 165/3 = 55

Thus, it took 55 days for JIM to run 165 miles

if 9x = 18 what is the value of x

Answers

Answer:

The correct answer is x = 2.

Step-by-step explanation:

To solve this problem, we should first remember that in solving equations, our goal is to get the variable (in this case, x) by itself on one side of the equation.  To do this, we must divide both sides of the equation by 9 to get rid of the coefficient on the x term.  This is modeled below:

9x = 18

9x/9 = 18/9

x = 2

Therefore, the correct answer is x = 2.

To check your answer, you can always plug the value for x back into the equation.  For example, 9(2) = 18 is a true statement, so we know that we got the correct answer.

Hope this helps!

The value of x from the equation 9x = 18 is x= 2.

To find the value of x in the equation 9x = 18, we need to isolate x on one side of the equation.

To do that, we can divide both sides of the equation by 9:

(9x) / 9 = 18 / 9

Simplifying:

x = 2

Therefore, the value of x is 2.

We can also say that,

By dividing both sides of the equation by 9, we determined that when x is multiplied by 9, it equals 18, so x must be 2 in order for the equation to be true.

Learn more about Equation here:

https://brainly.com/question/29538993

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2. Based on the table below, determine the exponential function being used. Use x as your variable. Then, evaluate this expression for x=7.

Answers

Answer:

[tex]y=5^{x}\\y=5^{7}=78125[/tex]

Step-by-step explanation:

[tex]y = a^{x}, a=5\\y=5^{x}\\y=5^{0}=1\\y=5^{1}=5\\y=5^{2}=25\\y=5^{3}=125\\and\\y=5^{7} = 78125[/tex]

Simplify each expression.
20) (2x2 +82 + 7x) - (7x + 4- 612)​

Answers

Answer:

40x2+133x+2248

Step-by-step explanation:

20(2x2+82+7x)−(7x+4−612)

Distribute the Negative Sign:

=20(2x2+82+7x)+−1(7x+4−612)

=20(2x2+82+7x)+−1(7x)+(−1)(4)+(−1)(−612)

=20(2x2+82+7x)+−7x+−4+612

Distribute:

=(20)(2x2)+(20)(82)+(20)(7x)+−7x+−4+612

=40x2+1640+140x+−7x+−4+612

Combine Like Terms:

=40x2+1640+140x+−7x+−4+612

=(40x2)+(140x+−7x)+(1640+−4+612)

=40x2+133x+2248

find the distance between the points (27, -8) and (15, -3).​

Answers

Answer: The distance between (27, -8) and (15, -3) is 13 units.

Step-by-step explanation:

Use the distance formula to calculate the distance between these two points. Just by plugging in the given ordered pairs, you can simplify and solve down to get an answer of 13 units.

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