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
Montano1993 [528]
2 years ago
12

A boat travels 30 miles up the river in the same amount of time it takes to travel 38 miles down the same river. If the current

is 2 miles per hour, what is the speed of the boat in still water?
Mathematics
1 answer:
Ksenya-84 [330]2 years ago
5 0
X miles per hour  -  <span> speed of the boat in still water
(x - 2)  -  speed up the river
(x + 2)  -  speed down the river
</span>
\frac{30}{x - 2} = \frac{38}{x + 2}
30 * (x + 2) = 38 * (x - 2)
30x + 60 = 38x - 76
- 8x = - 136
x = 17 miles per hour  -  <span>the speed of the boat in still water.</span>
You might be interested in
If I walk 3/4 mile to work and 3/4 mile home each day, how long will it take me to walk 3 miles?
anastassius [24]

Answer:

2 days

Step-by-step explanation:

for a day you walk 1.5 mile (0.75 + 0.75)

so it will only take 2 days

6 0
3 years ago
How do you make 2/5 a percent??
Yakvenalex [24]
Divide 2 by 5.
you get .4
to make a number a percent, you shift the decimal two placed to the right.
so 2/5=.4=40%
4 0
3 years ago
Cual es la fracción de 0.7
kakasveta [241]

Answer:

La fracción de 0.7 es 7/10

8 0
3 years ago
A multi-layer cake is in the shape of a right cylinder. The height of the cake is 20 centimeters, and its radius is 10 cm. If ea
gizmo_the_mogwai [7]

Answer:

There are total 5 layers.

Step-by-step explanation:

A multi-layer cake is in the shape of a right cylinder.

Height of the cake is = 20 cm

Radius is = 10 cm

Each of the cake layers has a volume of approximately 1,250 cm³.

Means, the volume of 1 cylindrical layer is 1250 cubic cm with radius as 10 cm and we have to find the height.

Volume of the cylinder is given as:

V=\pi r^{2} h

1250=3.14\times(10)^{2}\times h

1250=314 h

h=\frac{1250}{314}

h = 3.98 or approximately height of 1 layer is 4 cm.

As the cake's height is 20 cm so, there are \frac{20}{4}=5 layers in the cake.

Answer: There are 5 layers in the cake.

5 0
3 years ago
a woman earned wages of $34,600, received $1500 in interest from savings acxount, and contributed $2900 to a tax-deferred retire
xz_007 [3.2K]
Add them all.34,6000 and 15000 and 2900 and 4050
4 0
2 years ago
Other questions:
  • 100^m ÷ 1000^n can be written in the form 10^z. Express z in terms of m and n
    15·2 answers
  • the table shows the number of lift tickets and ski rentals sold to two different groups. Is it possible to determine how much ea
    12·1 answer
  • Find the value of X.<br> to<br> 67°<br> 56°
    11·2 answers
  • I need to know the m.a.dof 15,17,23,19
    14·2 answers
  • Give an example of an odd function and explain algebraically why it is odd.
    10·1 answer
  • PLEASE HELP ITS DUE IN 5 MINUTES
    15·1 answer
  • :P ??????<br><br><br><br><br><br> “ItS ToO ShOrT”
    6·1 answer
  • 3. What multiplication expression<br> represents 7 + 7 + 7 + 7?
    12·1 answer
  • 27 is 45% of what number?
    11·2 answers
  • On a family trip to Oman, Tarek drove 300 km in 5 hours. This is an example of a unit rate or a rate? Please tell the correct an
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!