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
Kryger [21]
3 years ago
10

The excursion boat on the river takes 2½ hours to make the trip to a point 12 miles upstream and to return. If the rate at which

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:
Orlov [11]3 years ago
6 0

Answer:

2 mph

Step-by-step explanation:

time = distance / speed

Let c represent the rate of the current. Then the upstream rate of the boat relative to the shore is (5c -c) = 4c, and the <em>upstream time</em> is ...

... 12/(4c) = 3/c.

Likewise, the downstream rate is (5c +c) = 6c, and the <em>downstream time</em> is ...

... 12/(6c) = 2/c.

The <em>total time</em> is the sum of upstream and downstream times:

... 3/c +2/c = 2.5

... 5/c = 2.5 . . . . . . combine terms

... 5/2.5 = c = 2 . . . multiply by c/2.5

You might be interested in
What is the equation of the line graphed?
never [62]
Y=3x-2 is the equation :^}
8 0
3 years ago
Read 2 more answers
-(-8n+3.9)
nataly862011 [7]

Answer:

8n - 3.9

Step-by-step explanation:

Given

- (- 8n + 3.9 ) ← multiply each term in the parenthesis by - 1

= 8n - 3.9

4 0
3 years ago
PLEASE SOMEONE DO THE QUESTION FOR ME PLS ILL GIVE BRAINLIEST!!
dybincka [34]

Answer:

28/100

55/100

40/100

50/100

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
The scores of eighth-grade students in a math test are normally distributed with a mean of 57.5 and a standard deviation of 6.5.
Firlakuza [10]
Approximately 68% of a normal distribution lies within one standard deviation of the mean, so this corresponds to students with scores between (57.5-6.5,57.5+6.5)=(51,64).
5 0
3 years ago
Read 2 more answers
Manny bought a brand new car for $29,750. The car depreciates in value by 12% each year. Find the value of the car after 6 years
Arte-miy333 [17]

Answer: $13,846.02

Step-by-step explanation:

The car cost $29,750 when it was first bought.

It will then depreciate at a rate of 12% per year. This means that the value of the car reduces by 12% per year.

To find the value of the car in the 6th year, you can use the compound interest formula:

= Value of car * ( 1 - rate) ^ no. of years

= 29,750 * ( 1 - 12%)⁶

= ‭13,816.021581824‬

= $13,846.02

6 0
3 years ago
Other questions:
  • How to solve radical numerator fractions
    7·1 answer
  • What is the volume in cubic meters of 18 MM
    14·1 answer
  • What is 52% of 10 <br><br><br> Mckenna Kampfer
    10·2 answers
  • Please need help!!!!
    14·2 answers
  • Its pitcher is shaped like a cylinder with a radius of 1 centimeter and a height of 7.8 cm. What's this pitcher plant's approxim
    10·1 answer
  • Please help! I dont understand this, I will give 15 points!
    10·1 answer
  • Max has 4/5 qt of apple juice. He drinks 1/2 qt of it. How many apple juice does he have left? (Give your answer in quarts)
    5·1 answer
  • Alexa won 80 super bouncy balls playing horseshoes at her school's game night. Later, she gave two to each of her friends.
    12·1 answer
  • I will give brainiest to the person who answers this
    12·1 answer
  • I don't understand the question.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!