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
postnew [5]
3 years ago
7

the excursion boat on the river takes 2 1/2 hours to make the trip to a point 12 miles up stream and to return. If the rate at w

hich the boat travels in still water is 5 times the rate of the river current, what is the rate of the current?
Mathematics
1 answer:
MissTica3 years ago
4 0
Let V, be the rate in still water and let C = rate river current
If the boat is going :
upstream, its rate is V-C and if going 
downstream, its rate is V+C,
But V = 5C, then
Upstream Rate: 5C - C = 4 C
Downstream rate: 5C+C = 6C

Time = distance/Rate,  (or time = distance/speed) , then:
Upstream time 12/4C and
Downstream time: 12/.6C

Upstream time +downstream time:= 2h30 ' then:

12/4C + 12/.6C = 2.5 hours
3/C + 2/C = 5/2 (2.5 h = 5/2)
Reduce to same denominator :
 5C = 10 and Rate of the current = 2 mi/h

You might be interested in
To find the answers
8_murik_8 [283]
1,876,200 - if it's higher than 5 go up - that means 1,880,000

1,876,200 - means 1,900,000
1,876,200 means 2,000,000
    
4 0
3 years ago
Find the value of x in the triangle shown below.​
ZanzabumX [31]

Answer:

Step-by-step explanation:

try using each answer choise to find your answer it shoud equal 180 because all of the triangles equal that.

7 0
3 years ago
3. Using the net, calculate and label the area of each face of the prism.
AysviL [449]

Answer:

Finding the areas of each of the rectangles and squares of the net of a rectangular prism and adding up those areas gives the surface area or total surface area of the prism. For example, if the length of one side of the cube 4 units then the area of one its face is 4 × 4 = 16 square units.

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Helllp me!! Need answer right now!!! Please!!!
posledela
POINT C..............................................................
6 0
2 years ago
Read 2 more answers
Year 10
mylen [45]

Answer:

=3x³+2x²−27x−18

Step-by-step explanation:

(x+3)(x−3)(3x+2)

=((x+3)(x−3))(3x+2)

=((x+3)(x−3))(3x)+((x+3)(x−3))(2)

=3x³−27x+2x²−18

=3x³+2x²−27x−18

6 0
2 years ago
Other questions:
  • 3) Solve each equation using the quadratic formula. Show<br> a. x2 – 3x – 10 = 0
    7·1 answer
  • Find the measure of the complement of a 7979degrees° angle.
    15·2 answers
  • Yesterday, Jim had b baseball cards. Today, he gave 13 away. Using b, write an expression for the number of cards Jim has left.
    9·1 answer
  • . upper left chamber is enlarged, the risk of heart problems is increased. The paper "Left Atrial Size Increases with Body Mass
    9·1 answer
  • Sara plotted 3 points from the equation y = 5 on this coordinate grid. She drew a straight line through the points.
    7·2 answers
  • How do I find the quotient 7/8÷2/9
    7·2 answers
  • PLEASE HELP I WILL MARK YOU BRAINISLEST AND GIVE YOU 14 POINTS
    7·2 answers
  • I'll mark as brainliest! <br> Please help!
    15·1 answer
  • Find the vertex and focus of the
    12·1 answer
  • Someone help and please answer it fully
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!