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
notka56 [123]
3 years ago
7

The speed of the current is 7 mph. The boat travels three times slower against the current than with the current. What is the sp

eed of the boat in still water?
Mathematics
1 answer:
kotykmax [81]3 years ago
3 0
Let the speed of the boat be x
so going against the current the speed is x-7
going with the current the speed is x+7

let the distance be d
time = distance / speed
time to go against the current = d/(x-7)
time to go with the current = d/(x+7)

time going against the current is 3 times going <span>with the current
</span>
d/(x-7) = 3d/(x+7)     ⇒⇒⇒ divide by d 
1/(x-7) = 3/(x+7) 
x+7 = 3(x-7) 
x+7 = 3x - 21
2x = 28
x = 14

So, the speed of the boat in still water is = 14 mph
You might be interested in
Benjamin bought 12 goldfish. Each goldfish cost $0.98. How much did Benjamin spend
jeka57 [31]
If each goldfish cost $0.98 simply multiply this by the amount of fish bought:

(0.98)(12)
= 11.76

Benjamin spent $11.76 on his goldfish

Hope this helped!
8 0
3 years ago
Read 2 more answers
ANSWER AND EXPLAIN FOR BRAINLIEST :)
Ksenya-84 [330]

Answer: this is what i can tell you if it is a right triangle then you will di 90 - your numbers but if it is not a right triangel then you will do 180 instend  then when you get the answer you add it with those numbers but not with the 90 or 180

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Explain the 2 different answers you can get when solving an equation and the variable is eliminated.
SashulF [63]

Answer:

Step-by-step explanation:

Don't know ur answer make q clear

4 0
3 years ago
Read 2 more answers
The sum of the angle measures of any triangle is 180 degrees. suppose that one angle in a triangle has a degree measure of −3x5
salantis [7]
If we let m₁, m₂, and m₃ be the measures of the angles of the triangle, the equation that would relate them to each other is,

     m₁ + m₂ + m₃ = 180

Given the measures of the first two angles, the measure of the third angle is calculated through the equation,

    m₃ = 180 - (m₁ + m₂)

Substituting the known expressions,

    m₃ = 180 - (-3x⁵ + 2x²)

Simplifying,

<em>    m₃ = 180 + 3x⁵ - 2x²</em>
7 0
2 years ago
1) What is 20% of 20?<br> 2) what is 15 is what percent of 30?<br> 3) 50 is 50% of what?
N76 [4]

Hi there!

The word "of" is the same thing as a multiplication sign.

1)

20% = 0.2

0.2 × 20 = 4


2)

? × 30 = 15

divide each side of the equation by 30

? = 0.5

0.5 = 50%


3)

50% = 0.5

0.5 × ? = 50

divide each side of the equation by 0.5

? = 100


There you go! I really hope this helped, if there's anything just let me know! :)

7 0
2 years ago
Read 2 more answers
Other questions:
  • Parallel lines are coplanar. What characteristics of these geometric figures create the different requirements?
    9·1 answer
  • I need help on number 42 specifically. id appreciate it ! :)
    13·1 answer
  • What is half of 1 and 1/4 cups?
    14·1 answer
  • m TMN = x + 72, m LMN = 166°, and m LMT = 96 + x. Find m LMT. what is the answer to this? ill make you the brainly
    6·1 answer
  • What is the mass of a football
    12·1 answer
  • What is the value of this expression? [(3+5)⋅2−5]⋅3
    11·2 answers
  • Please answer this question asap will be marked brainliest
    7·1 answer
  • Determine whether each pair of actions results in independent or dependent events.
    10·1 answer
  • The tangents to the curve with equation y = x^3-3x at the points A and B with x coordinates −1 and 4 respectively meet at the po
    15·2 answers
  • Set up a proportion to solve for x in the following similar triangles,
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!