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
bonufazy [111]
3 years ago
5

a boat can travel 30 miles upstream in the same amount of time you can travel 50 miles Downstream. If the speed of the current i

s 4 miles per hour, find the speed of the boat in still water.
Mathematics
2 answers:
almond37 [142]3 years ago
7 0
Speed, S = Distance (d) / Time (t) => S= d/t => t= d/S

Let the speed of boat in still water be x mph

Resulting speed upstream = x-4 mph for a distance of 30 miles
Resulting speed downstream = x-4 mph for a distance of 50 miles

Time taken in both distances is equal.
Therefore,

30/(x-4) = 50/(x+4) => 30(x+4) = 50(x-4) => 30x+120 = 50x-200 => 120+200 = (50-30)x => 20x = 320 => x=320/20 = 16 mph

The speed of boat in still water is 16 mph.


MA_775_DIABLO [31]3 years ago
6 0
The correct answer is 16mph.
You might be interested in
What digit is in the ten-thousands place in the number 81,473
Ugo [173]

Answer:

8

Explanation:

8 - Ten-Thousands

1 - Thousands

4 - Hundreds

7 - Tens

3 - Ones

3 0
3 years ago
Read 2 more answers
Solve for a: a(a-3) =100
marissa [1.9K]
a(a-3) =100\\
a^2-3a-100=0\\
\Delta=(-3)^2-4\cdot1\cdot(-100)=9+400=409\\
\sqrt{\Delta}=\sqr{409}\\
a_1=\dfrac{-(-3)-\sqrt{409}}{2\cdot1}=\dfrac{3-\sqrt{409}}{2}\\
a_2=\dfrac{-(-3)+\sqrt{409}}{2\cdot1}=\dfrac{3+\sqrt{409}}{2}
5 0
3 years ago
Technical Difficulties
kotykmax [81]

Answer:

Step-by-step explanation: 4848474838387398437939743927938<em>5</em>

7 0
3 years ago
Find all zeros<br>f(x)=x^4+6x^3+173x^2+332x+164​
zheka24 [161]
The zeros are (-1,0)
6 0
3 years ago
Evaluate the expression x^2 - y^2, if x = -3, and y= 2
Darina [25.2K]

\\ \rm\longmapsto x^2-y^2

\\ \rm\longmapsto (-3)^2-(2)^2

\\ \rm\longmapsto 9-4

\\ \rm\longmapsto 5

4 0
3 years ago
Other questions:
  • HELPPPP!!!<br> Select the correct answer.<br> Which function is an even function?
    7·1 answer
  • Find the GCF of 56 and 46. 2 8 10
    8·2 answers
  • What's the 6th term in a sequence that starts with -7.5 and has a common ratio of 9?
    5·1 answer
  • Determine whether f(x)= 2x + 4 and g(x)= x - 4 are inverses of each
    9·1 answer
  • Which choices are equivalent to the expression below? Check all that apply.
    10·2 answers
  • Multiply : root(6, x) * root(4, y ^ 3) Rewrite the expression using rational exponents with a common denominator x * y ^ (11/2)
    8·2 answers
  • PLEASE HELP IM FAILING ALGEBRA!!<br> (SHOW WORK)
    8·1 answer
  • Use the figure below to Find midsegment please help
    7·1 answer
  • aiden earns 2 1/2 as much as evan every day. jake earns $18 more than evan in a day. If the total daily salary of all three peop
    9·1 answer
  • Alice is riding the train to her job in Paris, France. She accidentally purchased a ticket for zone 4, but she is
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!