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
lozanna [386]
1 year ago
15

In calm water, the motorboat of Jana is moving at the speed of 16.5km/h. On a river, because of the current, the boat moves fast

er down the river only by raising it. Jana went up the river in 5 hours and the decent in only 2 hours. What is the speed of the current?
Mathematics
1 answer:
ki77a [65]1 year ago
4 0

Answer: 707 km/h

Step-by-step explanation:

let c = speed of current

16.5 + c = speed of sailboat downstream

16.5 - c = speed of sailboat upstream

distance = travel time * speed

﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋

2(16.5 + c) = 5(16.5 - c)

33 + 2c = 82.5 - 5c

7c = 49.5

c = 7.07 km/h

You might be interested in
How much would $100 invested at 8% intrest compounded annually be worth after 15 years? round your answer to the nearest cent. d
frosja888 [35]
Our P = 100, r = .08, n = 1 (annually means once a year), and t = 15.  Filling in accordingly, we have A(t)=100(1+ \frac{.08}{1})^{(1)(15)}.  Simplifying a bit gives us  A(t)=100(1+.08)^{15}  and  A(t)=100(1.08)^{15}.  Raising that number inside the parenthesis to the 15th power gives us  A(t)=100(3.172169114).  Multiplying to finish means that A(t) = $317.22
3 0
3 years ago
Start at 3. create a pattern that multiplies each number by 3 stop when you have 5 numbers
Gnesinka [82]
3, 6, 9, 12, 15
I did what you asked
7 0
3 years ago
Read 2 more answers
because an item is slightly dameged, a stock clerk reduced the price by $6. this represents 15% reduction.what was the original
Paul [167]

Answer:

$40

Step-by-step explanation:

6 = .15x

6 / .15 = 40

8 0
3 years ago
Hii please answer really easy xx
dlinn [17]

Answer:

Step-by-step explanation:

find only for x or?

8 0
3 years ago
A teacher interested in determining the effect of a new computer program on learning to read conducted a study. One hundred stud
djyliett [7]

Answer:2

Step-by-step explanation:

4 0
2 years ago
Other questions:
  • The ratio of boys to girls in Ms.cunninghams class is 2 to 3. There are 18 girls in the class what is the total number in ms.cun
    9·2 answers
  • What is the name of the figure?
    14·2 answers
  • A box is a cuboid with dimensions 28 cm by 15 cm by 20 cm all measured
    10·1 answer
  • Kiara downloaded 264 pictures from her cell phone to her computer. These pictures took up 528 megabytes of space in her computer
    12·1 answer
  • 120 x ? = 40
    5·1 answer
  • The expense ratio (in percentage) for large-cap growth mutual funds have the following sample data0.52, 1.06, 1.26, 2.17, 1.55,
    8·1 answer
  • Identify the vertex of the function graphed below.
    5·2 answers
  • Answer asap<br> Thanks<br> ;)
    11·1 answer
  • Choose the equation for the graph
    10·1 answer
  • Find the LCM of 121, 280 and 550.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!