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
bixtya [17]
3 years ago
13

PLEASE HELP FAST!!!!

Mathematics
1 answer:
DochEvi [55]3 years ago
6 0

Answer:

Time = 25/9 hr

Step-by-step explanation:

Let speed of boat in still water is x km/hr

then, speed in downstream equals to "x + 3"km/hr

and speed in upstream equals to "x - 3" km/hr

We also know that time taken to travel 3km in upstream is twice as time taken to travel 4km in downstream.

so,  using time = distance/speed

              3/x- 3   = 2 × (4/x + 3)

                3x + 9 = 8x -24

                    5x = 33

                      x = 33/5 km/hr

Net speed in upstream = 33/5 - 3 = 18/5 km/hr

So, Time taken to travel 10km upstream = distance /speed

                      =  (10 × 5) / 18 = 25/9 hr

Time = 25/9 hr

You might be interested in
51 correct 9 incorrect write in simplest form
mrs_skeptik [129]
Yesrrrdrrffffffrrrrrdfddddddddf
5 0
3 years ago
Read 2 more answers
How to convert 7/11 to a decimal using long division
Helga [31]
The answer would be

7/11=0.6363636364
5 0
3 years ago
Use a truth table to verify the first De Morgan law (p ∧ q)’ ≡ p’ ∨ q’.
Nutka1998 [239]

Answer:

(p ∧ q)’ ≡ p’ ∨ q’

Step-by-step explanation:

First, p and q have just four (4) possibilities, p∧q is true (t) when p and q are both t.

p ∧    q

t t t

t f f

f f t

f f f

next step is getting the opposite

(p∧q)'

    <em>f</em>

<em>     t</em>

<em>     t</em>

<em>     t</em>

Then we get p' V q', V is true (t) when the first or the second is true.

p' V  q'

f  <em>f</em>  f

f  <em>t</em>  t

t  <em>t</em>  f

t  <em>t</em>  t

Let's compare them, ≡ is true if the first is equal to the second one.

(p∧q)'   ≡     (p' V q')

    <em>f              f </em>

<em>     t              t</em>

<em>     t              t</em>

<em>     t              t</em>

Both are true, so

(p ∧ q)’ ≡ p’ ∨ q’

6 0
4 years ago
I have no idea what i’m doing
cestrela7 [59]

Answer:

f(x)=x^2+1 -> f(a+1)=(a+1)^2+1=a^2+2a+1+1=a^2+2a+2

Step-by-step explanation:

7 0
3 years ago
The circle shown below has AB and BC as its tangents: AB and BC are two tangents to a circle which intersect outside the circle
Nadusha1986 [10]
We are given with
arc AC = 130
The measure of the arc on the other side of the circle is
360 - 130 = 230
Therefore, according to the theorem on circles, the measure of angle ABC is 
(1/2) ( 230 - 130) = 50

3 0
3 years ago
Read 2 more answers
Other questions:
  • What is 6 to the second power divided by 2(3)+4=
    8·2 answers
  • What is the midpoint between 3.82 and 3.81. please, I need major help with this
    15·2 answers
  • Choose a number between 61 and 107 that is a multiple of 3 , 9 and 12
    14·1 answer
  • Can someone show me step by step?
    10·1 answer
  • Write a multiplication equation for ''How many 3/4 are in 7/2?
    15·2 answers
  • Four times a number minus twice another number is -16. The sum of the two numbers is -1. Find the numbers
    7·1 answer
  • Help with multiple choices homework
    9·1 answer
  • Pleaseeee help me like I figured one out I just don’t know what the other one is
    5·1 answer
  • the speed of light is 11,176,920 and the distance from earth to sun at a specific time is 92,955,807. about how long does it tak
    10·1 answer
  • Which table shows a bank account balance that increases by a constant amount each month?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!