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
melisa1 [442]
2 years ago
12

if a boat goes 72 miles downstream in 3 hrs and upstream 60 miles in 6 hours , what is the rate of the river and the boat in sti

ll water respectively?
Mathematics
2 answers:
Rudiy272 years ago
8 0
S=speed of the boat
C=current
Speed upstream = (s-c)
Speed downstream = (s+c)
Distance=time*speed
3(s+c)=72
s+c=24
6(s-c)=60
s-c=10

Use the elimination process to solve the system of equations
s+c=24; s-c=10
2s=34
s=17 mph boat speed

Find the current:
s+c=24
17+c=24
c=24-17
c=7

Check your solutions: 3(s+c)=72 and 6(s-c)=60
3(24)=72
6(10)=60
sergejj [24]2 years ago
3 0
What type of wizardry is this?
You might be interested in
Why are plus and minus signs ignored in percent error calculations?
inna [77]
<span>Percent error is the percentage ratio of the observed value and the true value difference over the true value so you don't need plus or minus signs. Thanks!</span>
8 0
2 years ago
If the sale price is $40 and the discount is 25%, what is the original price?
sveta [45]
Use this equation to solve the problem:

x - (x * .25) = 40

This equation is saying the original price times itself by 25% is 40.

x - (x * .25) = 40
Simplify.
x - .25x = 40
.75x = 40
Divide both sides by .75.
x = 53.33

The original price was $53.33
3 0
3 years ago
A class of 33 students elected a class treasurer. There were 11 votes for Candidate A and 15 votes for Candidate B. The remainin
vovangra [49]
To start out, notice that you want the percent of voters that chose candidate A, not the percent of the class that chose candidate A.

Your fraction should be "number that chose candidate A" out of "number of voters," which is the same thing as saying:  
"number that chose candidate A" divided by "number of voters"

1) The numerator of the fraction should be the number of votes for candidate A, which is 11.

2) The denominator of the fraction should be the number of voters. You're told that "t<span>here were 11 votes for Candidate A and 15 votes for Candidate B," so there are:
</span>11 + 15 \: total \: votes

3) Finally put parts 1 and 2 together into a fraction and multiply by 100 to get your percent. That is your final answer:
\frac{11}{11+15}  \times 100

----

Answer: Top right choice, \frac{11}{11+15} \times 100
<span>

</span>
5 0
3 years ago
Write an equation perpendicular to x-4y= 20 that passes through the point (2, -5)
KIM [24]
4(x -2) +(y +5) = 0 . . . . . an equation

4x +y = 3 . . . . . . . . . . . . the equation in standard form
___
A graph can be seen at
https://www.desmos.com/calculator/3ct9gfxclj

5 0
3 years ago
1/2 ÷8 = <br><br> this on studyisland
vitfil [10]

Answer:

0.19

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Other questions:
  • A pair of 120 shoes was discounted 20 percent a costumer had a coupon for an additional 5 off what was the final price of the sh
    10·1 answer
  • What is the quotient of 75 and 2.4
    6·2 answers
  • Using the quadratic formula to solve 11x2 – 4x = 1, what are the values of x?
    15·1 answer
  • Tim makes 15.35 per hour. He works 40 hours per week. How much does he make per month
    11·1 answer
  • he graph of a system of equations with the same slope will have no solutions. sometimes, always or never
    5·1 answer
  • The two-way frequency table represents data from a survey asking mall visitors whether they like seafood, meat, or both.
    7·1 answer
  • Carey bought 8 tickets for $52 how many tickets could she buy for $90?
    15·2 answers
  • Rewrite the expression with a rational exponent as a radical expression.
    9·2 answers
  • What is five-eights divided by four?<br> Please answer using decimals!<br> Will give brianliest
    12·2 answers
  • Helppp please <br> Which point is located at (-3.-2)?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!