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
mote1985 [20]
3 years ago
14

A plane flies 720 miles with the wind in 3 hours. The return trip against the wind takes 4 hours. What is the speed of the wind

and the speed of the plane in still air?
Mathematics
1 answer:
Mandarinka [93]3 years ago
4 0
Let p and w represent the speed of the plane and the speed of the wind, respectively.
.. speed = distance/time
.. p +w = 720/3 = 240
.. p -w = 720/4 = 180

Add the two equations to eliminate w.
.. 2p = 420
.. p = 210
.. w = p -180 = 30

The speed of the wind is 30 mph.
The speed of the plane in still air is 210 mph.
You might be interested in
Solve the expression, 3-3x6+2.
sergey [27]
It would be 2 silly because 3-3=0 and 0 x 6=0 and 0 + 2 = 2 so that is the answer 2

3 0
3 years ago
Read 2 more answers
In the word problem below, what answer or solution are you being asked to
sweet-ann [11.9K]

Answer:

the answer is C 6x2 .....................

8 0
3 years ago
Grant's credit card has an apr of 11.28% and it just changed its compounding period from monthly to daily . What happen to the i
madreJ [45]

Answer:

C. It will increase by about 0.6%

Step-by-step explanation:

Since, the effective interest rate is,

r=(1+\frac{i}{n} )^{n} -1

Where, i is the stated interest rate,

n is the number of compounding periods,

Here, i = 11.28 % = 0.1128,

n = 365  ( 1 year = 365 days ),

Hence, the effective interest rate would be,

r=(1+\frac{0.1128}{365})^{365}  -1

=0.119388521952

Now, the changes in effective interest rate = Effective interest rate - Stated interest rate

= 0.119388521952 - 0.1128

= 0.006588521952 ≈ 0.006 = 0.6 %  

Hence, It will increased by about 0.6 %,

Option A is correct.

Hope this helps :)

7 0
3 years ago
(NEED HELP WITH NUMBER 1!!!)
alexandr1967 [171]

Answer:

35 ia the answer sorry if im wrong

7 0
3 years ago
How do you solve f(x)= 4x(2)-4x-3?
slavikrds [6]
If by 4x(2) you mean 4x to the power 2 or 4x^2...it can be solved in the following way
f(x)=4x^2-4x-3
=4x^2+2x-6x-3
=2x(2x+2)-3(2x+2)
=(2x-3)(2x+2)
Therefore x=3/2 or x=-2/2=(-1)
8 0
3 years ago
Other questions:
  • An aquarium holds 11.08 cubic feet of water,and is 2.5 feet long 1.3 feet wide.what is its depth.Round your answer to the neares
    14·1 answer
  • A taxi service charges a flat fee of $1.25 and $0.75 per mile. if henri has $14.00, which of the following shows the number of m
    5·1 answer
  • Dupa doua reduceri consecutive de pret , ambele de 10% , un aparat foto costa 567 lei. care a fost pretul initial al aparatului
    7·1 answer
  • Can someone give the answer for the number pattern, I am struggling. Please!
    15·1 answer
  • Solve the following equation. <br>10x-2-6x=2(2x-1)
    15·2 answers
  • a lemon pie was cut into 6 equal pieces. being on a diet, Matilda ate only half a piece. what fraction of the whole pie did she
    5·1 answer
  • A teacher wrote these numbers on the board: -5, -3,
    6·1 answer
  • If you roll a standard die, what is P(6) ? (probability of rolling a 6)
    7·2 answers
  • Find the equation of the line that is perpendicular to y = 2x + 8
    13·1 answer
  • Select the correct answer from each drop-down menu.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!