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
artcher [175]
3 years ago
12

The speed of a stream is 4km/h. A boat travels 6 km upstream in the time it takes to travel 12 km downstream. What is the speed

of the boat in still water
Mathematics
1 answer:
Usimov [2.4K]3 years ago
4 0
<span>6 km × 1 hour/(b-4 km) = 12 km × (1 hour/(b+4 km) 

6/(b-4) hours = 12/(b+4) hours

6(b+4) = 12(b-4)

6b + 24 = 12b - 48
72 = 6b
b = 12 
The boat's speed in still water is 12 km/hour.</span>
You might be interested in
A small town surveys 250 adults, 180 of which are parents, about whether or not a park should be expanded. The results showed th
guajiro [1.7K]
Given are:
250 adults and 180 parents
so we can solve the number of not parents
not parents = 250 - 180
not parents = 70
then we can number of people of votes for no
no not parents = 70 - 40  = 30
no parents = 180 - 150 = 30
             yes       no
parents     150        30
not parents  40         30 
5 0
3 years ago
If (x+5) and (x+2) are the factors, then the solutions are______ and ______. *
tangare [24]
X = -2 and -5
You can set both equal to 0 to find the answers.
5 0
3 years ago
A theorem in geometry states that the measure of an inscribed angle is half the measure of its intercepted arc. In the figure, a
Kryger [21]

Answer:The fourth option

Step-by-step explanation:

7 0
3 years ago
Explain how to get the answer please
mart [117]

Answer:

y=8.50x+0.25

Step-by-step explanation:

She/he starts off with 8.50 and throughout the week she can earn 0.25 per joke. We don't know how many times a joke is made so it would be an x.

4 0
3 years ago
Read 2 more answers
Simplify the expression (7+5)+4x13-2
koban [17]
I think the answer is 62 because 7+5=12  4*13=52  12+52=64  64-2=62
8 0
3 years ago
Other questions:
  • Over a period of years, a certain town observed that the correlation between x, the number of people attending churches, and y,
    9·1 answer
  • What is 64x64? and I know if you use a calculator =)
    13·1 answer
  • What property was applied to solve the equation below? I really need help. Picture included.
    10·1 answer
  • A scale model of a whale is being built. The actual length of the whale is 65 feet. The scale of the model is 2 inches 3 feet. W
    8·1 answer
  • A rectangular flower garden in Samantha's backyard has 140 feet around its edge. The width of the garden is 30 feet
    9·1 answer
  • The Jones family is expecting another baby. They have a 7 year old
    7·2 answers
  • A ____ is the total number of possible equal parts in a fraction
    9·2 answers
  • The sum of three consecutive odd numbers is 51. Find the numbers. Show your work and
    6·1 answer
  • Please help me answer these 2 questions, worth lots of points
    8·1 answer
  • Expand 6(x-8)= x- (8) = help me
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!