1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nata0808 [166]
3 years ago
10

A plane can fly 260 miles downwind in the same amount of time as it can travel 170 miles upwind. Find the velocity of the wind i

f the plane can fly 215 mph in still air.
Mathematics
1 answer:
Alex787 [66]3 years ago
7 0
From the two statements we can say:

260=(215+w)t

t=260/(215+w)

Now from the second statement:

170=(215-w)t

t=170/(215-w)

We are told that t=t, for the downwind and upwind equations so:

260/(215+w)=170/(215-w)  

260(215-w)=170(215+w)

55900-260w=36550+170w

-430w=-19350

w=45

So the wind speed is 45mph.

You might be interested in
245,600,000,000 in scientific notation
vekshin1

Answer:

2.456  x 10^11

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

4 0
3 years ago
Solve 5(2^x+4)=15 round to the nearest thousandth
Novosadov [1.4K]

Answer:

Step-by-step explanation:

Begin by dividing by 5

2x + 4 = 3            

Is this written as 2^(x + 4) = 3? I think it is.

Take the log of both sides

log 2^(x + 4) = log(3)

(x + 4) * log(2) = log 3

log 2 = 0.30103

log 3 = 0.47712

(x + 4) = log2 / log3

x + 4 = 0.63093               Add 4 to both sides

x = -3.369                        Rounded to the nearest thousandth

====================

If you mean the question exactly as it is written (the 4 is not part of the power)

5(2^x + 4) = 15

2^x + 4 = 3

2^x = 3 - 4

2^x = - 1

This can't be done 2 to any power should be >0.

if x>0 then this will give an ever increasing number

if xK0 then this will give an ever decreasing answer but still greater than 0.

No value will make 2^x go to something minus.

If I have misread this in some way, leave a note and I will get back to you.

5 0
3 years ago
Multiply 6 and 7. Then, divide by 3.
posledela

6 * 7 = 42 so then you take and divide

42/3 =  14

7 0
3 years ago
Read 2 more answers
Which is greater 8 1/2 or 9 1/2 and how do you put it as a expression using > < and =
aivan3 [116]

Answer: 8 1/2 is less than 9 1/2, 8 1/2< 9 1/2

7 0
3 years ago
Read 2 more answers
The manager of a grocery store reports that there is a 12 percent chance that a customer buys apples during a shopping trip, a 5
FromTheMoon [43]
P(A) = 0.12
P(A\cap C)=0.05
P(A\cup C)=0.17=P(A)+P(C)-P(A\cap C)
0.17=0.12+P(C)-0.05
P(C)=0.17-0.12+0.05=0.10
5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the line for m!
    9·1 answer
  • Explain how to find the degree of a polynomial
    14·1 answer
  • Trigonometry Problem <br><br> Find the length of the missing side.
    5·1 answer
  • If M(-2,8) is reflected in the y-axis what are the coordinates of M , the image M
    10·1 answer
  • The amount of water inside each of these things is proportional to the volume of the tank the tropical fish tank has a volume of
    15·2 answers
  • A person rolls a standard six-sided die 9 times. In how many ways can he get 3 fours, 5 sixes, and 1 two?
    8·1 answer
  • Could you divide 14 shirts into two equal groups? Why or why not?
    8·2 answers
  • I<br> =<br> ∫<br> 1<br> 0<br> √<br> 1<br> −<br> x<br> 2<br> d<br> x
    9·1 answer
  • A bakery makes a $5 profit for each cake it sells. It makes
    10·1 answer
  • )) A line's slope is 6, and its y-intercept is 6. What is its equation in slope-intercept form?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!