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
Crank
2 years ago
12

A moterboat that ravels with a speen of 20km/hour in still water has traveld 20 km against the current and 180km with the curren

t having spent 8 hours on the entire trip find the speed of the current of the riveer.
plz help ill give brainliest
Mathematics
2 answers:
Ira Lisetskai [31]2 years ago
5 0

Answer:

10 kph

Step-by-step explanation:

Find the speed of the current of the river.

20/(20 - c) + 180/(20 + c) = 8

20(20 + c) + 180(20 - c) = 8(400 - c^2)

8c^2 - 160c  + 800 = 0

8(c^2 - 20c + 100) = 0

8(c - 10)^2 = 0

c = 10

The speed of the current of the river is 10 km/hour.

Goryan [66]2 years ago
5 0
10 kph because if you divide
You might be interested in
Ac=22 BC= x+41 and AB = x + 10 find x
Elenna [48]
Draw the figure out and you will find that AB + BC = AC. Given this, put the equations together to form x+41+x+10=22. Solve to get x=-29/2
7 0
3 years ago
Each Club member collected 15 boxes of recycling for community service. Let c represent the number of club members and T represe
TEA [102]
The equation is (assuming you meant the instead of two): T = 15c
3 0
3 years ago
Read 2 more answers
I do all things in zero sums in my head is that possible to be a zero?
elixir [45]
Yes but it dose depend on the problem
6 0
2 years ago
Read 2 more answers
What would you multiply the dividend and divisor by in the following division problem so that the divisor would become a whole n
horsena [70]
Devisor is the bottom number
hmm

11.75=11 and 3/4
so times it by 4  to clear denomenator
but do it by top and bottom

23.4/11.75 times 4/4=93.6/47

so times it by 4/4
5 0
3 years ago
Read 2 more answers
A new car is purchased for 24600 dollars. The value of the car depreciates at 5.5% per year. To the nearest year, how long will
boyakko [2]

Answer:

The number of years until the value of the car is 11300 dollars is 9 years.

Step-by-step explanation:

This can be calculated using the following formula:

Value of the Car = Purchase cost - (Annual depreciation expenses * N) ........ (1)

Where;

N = Number of years until the value of the car is 11300 dollars

Purchase cost = $24,600

Annual depreciation rate = 5.5%

Annual depreciation expenses = $24,600 * 5.5% = $1,353

Value of the car = $11,300

Substituting the value into equation (1) and solve for N, we have:

$11,300 = $24,000 - ($1,353 * N)

$1,353 * N = $24,000 - $11,300

$1,353 * N = $12,700

N = $12,700 / $1,353

N = 9.38654841093865

Rounding to the nearest year as required by the question, we have:

N = 9

Therefore, the number of years until the value of the car is 11300 dollars is 9 years.

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Item 4 Evaluate. 6^2+(3⋅4)− 2^4
    12·2 answers
  • The expression (x2 - 5x - 2) - (-6x2 - 7x - 3) is<br> equivalent to
    14·1 answer
  • 1. If you flip a fair coin 5 times, what is the probability of:
    10·1 answer
  • Use the equation p = 831 where p = pressure and
    13·1 answer
  • Let x be the number of $5 items and y the
    8·1 answer
  • The rate of U.S. per capita sales of bottled water for the period 2000-2010 can be approximated by
    15·1 answer
  • The average spending at Neco's salad bar is $9.03 with a standard deviation of $3.26. The distribution follows t-distribution. T
    8·1 answer
  • Hola alguien me puede dar un truco para aprenderse la tabla del 8
    13·1 answer
  • Please help ill give brainliest answer!
    14·1 answer
  • Help! Please! Im Failing :'
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!