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
Paladinen [302]
3 years ago
15

A student is running a 5-kilometer race. He runs 1 kilometer every 3 minutes. Select the function that describes his distance fr

om the finish line after x minutes
Mathematics
2 answers:
Phantasy [73]3 years ago
7 0
D = distance from finish line

D= 5 - 1/3x 

Distance from the finish line is equal to the distance of the start line from the finish line, minus one third of a km times the number of minutes hes been running.

using given variables; D= 5 - 1/3*3
D=5-3/3
D=5-1
D=4
Dmitriy789 [7]3 years ago
7 0

Answer: Hello there!

We know that the race is 5 kilometers long and that the runner runs 1 kilometer every 3 minutes.

Now we want to know the distance to the finish line after x minutes.

if we define the position zero as the starting point of the race; then the positon equation of the student as a function of x, where x is minutes, is:

p(x) = (1/3)km/min * x

where at x = 0, his position is 0 (so he is in the starting point of the race)

we know that the finish line is at a distance of 5 kilometers from the starting point, then the distance between the student and the finish line can be written as:

d(x) = 5 km - (1/3)km/min*x

now you can replace the number x whit the number of minutes that the student has been running, and you can find the distance left to finish the race.

Whit this equation you also can valuate d(x) in 0 ( this means that the distance to the finish line is 0 km)

And find the time needed in order to finish the race:

d(x) = 0 = 5km - (1/3)km/min*x

x = 5*3 min = 15 min

You might be interested in
Need help can someone plz help me solved this problem ASAP! Need help I will mark you as brainiest
erik [133]

Answer: 22, 38

               3, 7

               8, 12

<u>Step-by-step explanation:</u>

It is given that the PERIMETER is BETWEEN 22 and 38

-->          22 < P < 38

Perimeter = 2w + 2L

It is given that L = w + 5

Substitute P with 2w + 2L and substitute L with w + 5

                22 <  2w + 2(w + 5) < 38

                 22 < 2w + 2w + 10 < 38    

                  12 <          4w        < 28    

-->               3 <          w          < 7          

Since L = w + 5, then w = L - 5

Substitute P with 2w + 2L and substitute w with L - 5

                22 <  2(L - 5) + 2L < 38

                 22 < 2L + 2L - 10 < 38    

                 32 <          4L        < 48    

-->               8 <            L        < 12  

7 0
3 years ago
Which value makes the equation true?<br><br><br><br> □+0.34=2.34
Nataly [62]

Answer:

2.00

Step-by-step explanation:

let the empty box be the variable n. n+0.34=2.34

subtract .34 from both sides

n=2.00

8 0
2 years ago
Read 2 more answers
Write an equation then solve it
umka2103 [35]
2x+54= 3x
x=54
teh answer is 54
7 0
3 years ago
Read 2 more answers
If a ÷ b = 2 and b ÷ c =3/4, what is the value of c ÷ a? Express your answer as a common fraction.
liberstina [14]

Answer:

a/b = 2

so , a = 2b

b/c = 3/4

so , c = 4b/3

c/a = (4b/3) / 2b

which gives 2/3

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
The angle that is an alternate interior angle with angle 1 is angle ?
natima [27]

Answer:

the alternate angle is angle 2

8 0
3 years ago
Read 2 more answers
Other questions:
  • I need help finding the slope of a line
    13·1 answer
  • For a-d, choose Yes or No to tell whether each of the following sets of side lengths will make a shelf that fits in a 90 degree
    9·1 answer
  • Plz help... geometry volume, density
    10·1 answer
  • The graph shown is a scatterplot which point on the scatterplot is an outliner??Help
    7·2 answers
  • During a season, the 40th percentile for points scored per player in a game is eight.
    10·1 answer
  • Can someone help me with it? click on the photo to see it in full screen
    10·1 answer
  • What is the value of (-5) the power of 4
    13·2 answers
  • PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!
    15·2 answers
  • Can someone please help me ?
    7·1 answer
  • 438 Friday night, 820 Saturday night and 636 Sunday afternoon. How many more people attended the play on Sunday than on Friday?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!