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
yulyashka [42]
2 years ago
11

A woman jogs for 2 km at 8 km/h and then walks for 2 km

Mathematics
1 answer:
Artemon [7]2 years ago
3 0

Answer:

  6 6/7 km/h

Step-by-step explanation:

The relations between speed, time, and distance are ...

  time = distance/speed

  speed = distance/time

__

So, to find the average speed, we need to know the total distance and the total time. The distances are given, but we need to compute the times.

  time jogging = (2 km)/(8 km/h) = 1/4 h

  time walking = (2 km)/(6 km/h) = 1/3 h

Then the woman's average speed is ...

  average speed = (total distance)/(total time) = (2 km + 2 km)/(1/4 h + 1/3 h)

  = (4 km)/(7/12 h) = 48/7 km/h

  = 6 6/7 km/h

You might be interested in
(N * 3) + 6 - (n * 2) = n + 3 what is value of n
GalinKa [24]
(n*3)+6-(n*2)=n+3
3n+6-2n=n+3
3n-2n-n=3-6 every n on the left and free numbers on the right
0=-3
contradiction,  there are no solution
7 0
3 years ago
Read 2 more answers
Simplified (4x3 - 5x2 + 3x) + (-2x3 - x2 + 6x)
bogdanovich [222]

Answer:

<em>Answer is</em><em> </em><em>imaginary</em><em> </em><em>root</em><em>s</em>

Step-by-step explanation:

({4x}^{3}  -  {5x}^{2}  + 3x) + ( -  {2x}^{3}  -  {x}^{2}  + 6x) \\ 2 {x}^{3}  - 6 {x}^{2}  + 9x = 0 \\ dividing \: by \: x \\ 2  {x}^{2}  - 6x + 9 = 0 \\ dividin g\: by \: 2 \\  {x}^{2}  - 3x +  \frac{9}{2}  = 0 \\ shifting \: the \: constant \: term \: on \: right \: side \\  {x}^{2}  - 3x =  -  \frac{9}{2}  \\ adding \:  \frac{1}{2}  \times (coefficient \: of \: x) \: whole \: square \\

On solving the above mentioned equation we get some imaginary values.

<em> </em><em> </em><em> </em><em>HAVE A NICE DAY</em><em>!</em>

<em>THANKS FOR GIVING ME THE OPPORTUNITY</em><em> </em><em>TO ANSWER YOUR QUESTION</em><em>. </em>

6 0
3 years ago
What do the grid boxes in a punnett square represent?.
san4es73 [151]

Answer:

All the possible allele combinations in the offspring.

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
At the fair concession stand, a drink costs $1.50, and a hot dog costs $2.75. If Jacob has $18 to spend on food, how many of eac
Cerrena [4.2K]

Answer:

Answer is D (2 drinks and 5 hotdog's)

Step-by-step explanation: 1st answer is over as it is $19.25 for only the hotdogs. 2nd is $18.50 which is a little over. 3rd one is $22.25. And the forth one is $16.75 which is perfect because he cant buy anything else with the remainder of his money.

6 0
3 years ago
Mel wants to buy a pair of shoes that costs $120. She has saved $45 and has a job that pays her $10 per hour. The number of hour
Radda [10]
X=8 she needs 120, she has 45. She needs 75 more. $10 an hour x 8 = $80
8 0
2 years ago
Other questions:
  • Given ∠8≅∠12 .
    8·2 answers
  • 8x10 exponent -3 is how many times as great as 4x10 exponent -6
    11·1 answer
  • Two similarity ratio of two similar polygons is 3:1. find the ratio of their perimeters
    11·2 answers
  • If y = 10x - 1 and the value of x is 10, what is the value of y?
    7·1 answer
  • Xavier can work no more than 40 hours in a week. He has already worked 24 hours this week. What is the maximum number of 8-hour
    6·2 answers
  • ASSIGNMENTS
    13·1 answer
  • Factor<br> 1 out of -x +6<br> The factored expression is
    12·1 answer
  • Select the measures that are equal to 3 gallons. Mark all that apply.
    8·2 answers
  • The estimated regression equation by least squares method minimizes the sum of the Group of answer choices Absolute deviations b
    7·1 answer
  • How many 3/8 are in the whole number 3?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!