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
Vladimir79 [104]
1 year ago
7

A small motorboat travels 12mph in still water. It takes 2 hours longer to travel 46 miles going upstream than it does going dow

nstream. Find the rate of the current
Mathematics
1 answer:
Natasha_Volkova [10]1 year ago
4 0

Using the relation between velocity, distance and time, it is found that the rate of the current is of 3.33 mph.

<h3>What is the relation between velocity, distance and time?</h3>

Velocity is distance divided by time, hence:

v = d/t

A small motorboat travels 12mph in still water. With the current, upstream, 46 miles are traveled in t hours, hence:

12 + r = 46/t

r = 46/t - 12

Downstream, the time is of t + 2 hours, hence:

12 - r = 46/(t + 2)

r = 12 - 46/(t + 2)

Hence, equaling the values for r:

46/t - 12 = 12 - 46/(t + 2)

46/t + 46/(t + 2) = 24

\frac{46t + 92 + 46t}{t(t + 2)} = 24

92t + 92 = 24t² + 48t

24t² - 44t - 92 = 0

Using a quadratic equation calculator, the solution is t = 3. Hence the rate is found as follows:

r = 46/t - 12 = 46/3 - 12 = 3.33 mph.

More can be learned about the relation between velocity, distance and time at brainly.com/question/28155966

#SPJ1

You might be interested in
A candy store makes a 9-pound mixture of gummy candy, jelly beans, and hard candy. The cost of gummy candy is $2.00 per pound, j
Musya8 [376]

Let

x--------> the amount of gummy candy in pounds

y--------> the amount of jelly beans in pounds

z-------->  the amount of hard candy in pounds

we know that

x+y+z=9 --------> equation 1

2x+3y+3z=23 --------> equation 2  

x=2y --------> equation 3  

Substitute equation 3 in equation 1 and equation 2

[2y]+y+z=9 -----> 3y+z=9 ------> equation 4

2[2y]+3y+3z=23 -----> 7y+3z=23 ------> equation 5  

using a graphing tool ------> Solve the system of equations

see the attached figure

the solution is the point (3,2)

z=3\ pounds\\y=2\ pounds

<u>Find the value of x</u>

x=2y

x=2*2=4\ pounds

therefore

<u>the answer is</u>

the amount of gummy candy is 4\ pounds

the amount of jelly beans is 2\ pounds

the amount of hard candy is 3\ pounds

8 0
3 years ago
Read 2 more answers
∠1 ​ and ∠2 are supplementary. ∠1=124°∠2=(2x+4)° Select from the drop down menu to correctly answer the question.
Alex_Xolod [135]
Remark
Supplementary angles add up to 180o. 

Givens
<1 = 124
<2 = 2x + 4

I imagine you are looking for either x or <2. 

Equation
<1 + <2 = 180          Substitute the givens
124 + 2x + 4 = 180  Collect like terms on the left.
128 + 2x = 180         Subtract 128 from both sides
2x = 180 - 128          Collect like terms on the right   
2x = 52                     divide by 2
x = 52/2
x = 26 <<<<<<<<< answer

<1 = 124
<2 = 2x + 4 = 2*26 + 4
<2 = 52 + 4
<2 = 56  <<<<<<<< answer

We need choices if you want an exact answer.

3 0
3 years ago
What is the area of the entire shape if the red trapezoid has an area of 1 square inch?
mr Goodwill [35]
It would be 1 square inch. You can't make a trapezoid cause if you tried to it would turn into a square.
5 0
3 years ago
At the circus, 3 adult tickets and 4 child tickets cost $47, and 6 adult tickets and 2 child tickets cost $64. Which system of l
Artemon [7]

Answer:

The adult tickets cost $9 each. The child tickets cost $5 each.

X = $9 and Y = $5

Step-by-step explanation:

$9 x 6 = $54

$5 x 2 = $10

Add them and you get $64.

For the first one, do the same.

$9 x 3 = $27

$5 x 4 = $20

Add them and you get $47

8 0
3 years ago
a scientist began a study with a simple of 1,500 bacteria . he noticed that the number of bacteria in the simple after t days ca
Aneli [31]

Answer:

the variable

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • The volume of one of the Great Lakes is 3.5 × 10E3 cubic kilometers.
    9·1 answer
  • Solve the triangle. A = 51°, b = 11, c = 7
    12·1 answer
  • What is equalvent to 7:15 A 21:45 b 14:45 c 3:5 d65:135
    6·1 answer
  • Estimate the quotient of 239.63 ÷ 7.51.
    15·1 answer
  • Solve 6- 7x = 7x - 9x + 11 The value of xis​
    10·1 answer
  • Find the interval on which the curve of y equals the integral from 0 to x of 2 divided by the quantity 1 plus 3 times t plus t s
    6·1 answer
  • PLEASE ANSWER THIS ALSO!!!​
    9·1 answer
  • Is this graph continuous or discontinuous?
    5·1 answer
  • Find y. round to the nearest tenth:
    14·1 answer
  • Evelyn swimming pool requires 3 quarts of a bacterial cleaning agent five times a month how many gallons of this agent will Evel
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!