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
goldenfox [79]
3 years ago
6

The runner has to race for 21km. She has to finish race before 1h 40min. What avarage speed She has to run to gain such goal?

Mathematics
1 answer:
abruzzese [7]3 years ago
7 0

Answer:

The rate of the runner is 3.5 meters per second.

Step-by-step explanation:

To get this answer in meters per second, we first have to convert each of the terms into either meters or seconds. We can do that by multiplying by unit rates.

21 km * 1000 = 21,000 meters

1 hour * 3600 = 3,600 seconds

40 minutes * 60 = 2,400 seconds

Now we divide the meters by the total number of seconds to get the rate.

21,000 meters / (3,600 + 2,400) secs

21,000 meters / 6,000 secs

3.5 meters per second.

You might be interested in
5x-3=19? Answer for Brainliest
vampirchik [111]

Answer:

x = 4.4

Step-by-step explanation:

I'm going to assume you want to solve for x so here we go.

You need to work backwards for this equation, and whatever you do to the LHS, you do to the RHS.

First, you need to remove the minus 3, which means that on both sides, you add 3. Adding three on the LHS makes the -3 disappear, and adding 3 on the RHS makes the 19 go to a 22.

Your equation is now 5x=22.

Since 5x means 5 × x, to get rid of it, you need to divide 5x by 5. Doing it to the LHS will make the five disappear, and doing it to the RHS will make it go to 22 ÷ 5 which equals 4.4

Therefore, x = 4.4

4 0
3 years ago
PLEASE HELP VENN DIAGRAM!
algol13

Answer:

Yes.

Step-by-step explanation:

Since there is an overlap, that does mean some people with brown hair do wear watches, but not all of them do. Hence it's independent.

4 0
3 years ago
Which of the following is a line segment in the drawing that connects two parallel lines?
charle [14.2K]

Answer:

line segment BE

Step-by-step explanation:

Parallel lines are lines that never cross.  In this case, the two parallel lines are AC and DF.  A line segment is part of a line that has a point at either end.  The only segment which crosses lines AC and DF is segment BE.  

Also, if you look at the answer choices, the first two indicate a line ↔ above the letters, which represents a line that doesn't end, while the other two choices just have a line to indicate a segment.  

8 0
3 years ago
6. Write an algebraic expression for the word phrase 5 times the product of x and y
Lena [83]

Answer:

5+x=y ,x-y=5,y-x=5,5-x=y,y+5=x

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
I really need help...Will mark brainiest
alexandr1967 [171]

Answer:

9a2b2=4c2

the 2s mean squared btw

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Help please!!!!! i don't understand, any help would be great!! thank you!!
    13·1 answer
  • 6051 m is equal to how many km?
    8·2 answers
  • In answering a question on a multiple-choice test, a student either knows the correct answer or guesses it. Let 0.7 be the proba
    15·1 answer
  • River C is 400 miles longer than River D. If the sum of their lengths is 5,590 miles, what is the length of each river?​
    6·1 answer
  • Explain how to average out a few numbers
    13·1 answer
  • Write all the factors of 21 .<br> Use commas to separate them.
    14·2 answers
  • And this one please.
    14·1 answer
  • 10. Determine the measure of each segment. Select the statement that is true.
    5·1 answer
  • In 2014, adele sold 2,500,000 records. In 2015, she sold 90% of the number of records she sold in 2014. In 2016, she sold 80% of
    6·2 answers
  • squares with sides of length x are cut out of each corner of a rectangular piece of cardboard measuring 19 ft by 11 ft. the resu
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!