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
Pavel [41]
3 years ago
10

How do i find the average speed for his question: "A bicycle racer rides from a starting marker at 10m/s. She then rides back al

ong the same rout from the turnaround marker at 16m/s. What is her average speed for the whole race?",
Mathematics
2 answers:
padilas [110]3 years ago
7 0

To find the average speed for the whole race, you just have to add the speed from a starting marker and the speed from the turnaround marker going back and divide it by 2 since there are only two speeds involved.

10 m/s + 16m/s = 26 m/s / 2 = 13 m/s

Therefore, the average speed for the whole race is 13 m/s.

vova2212 [387]3 years ago
6 0
<span>Average speed = Total Distance/Total time ------(1) Let us assume that the distance from starting marker to turnaround marker is 'x' Total distance travelled = 2x Speed from starting marker to turnaround marker , s1 = 10 m/s Speed from turnaround market to starting market , s2 - 16 m/s Let, Time taken from starting marker to turnaround marker be t1 Time taken from turnaround marker to starting marker be t2. Applying these values in equation (1), Average speed = (2x)/(t1+t2) -------(2) From (1), t1 = x/s1 = x/10 t2 = x/s2 = x/16 Substituting the above in (2), Average speed = (2x)/(x/10+x/16) m/s = (2x)/(13x/80) m/s = 160/13 m/s = 12.3 m/s We can also arrive at the average speed by using the formula 2(s1)(s2)/(s1+s2)</span>
You might be interested in
What is the area of the triangle? (Pls help thx)
Anna [14]
To solve for the area of the triangle 
Use the formula 1/2(base *height)
1/2 * 17* 4
68/2
34

I believe the area of the triangle is therefore 34ft
5 0
3 years ago
Trying to figure this out
prisoha [69]
I hope this helps you

6 0
3 years ago
A and b are odd numbers.
stepladder [879]

Answer:

2(3+7)=20 and 20 is a multiple of 4

Step-by-step explanation:

4 times 5 equals 20, which makes it a multiple of 4

3 and 7 are both odd, and added together get 10. Times that by 2 and you get 20

8 0
3 years ago
Read 2 more answers
Please find which quadratic equation matches the graph with work attached
lesya [120]

Answer:

C

Step-by-step explanation:

Firstly, we know that the function must be negative due to its shape. This means that the answer cannot be B

Next we can use the equation x=\frac{-b}{2a} that is used in order to find the vertex of the parabola.

A)

f(x)=-x^2+6x+7\\a=-1,b=6,c=7\\\\x=\frac{-6}{-2} \\x=3

As the vertex is at x=3 on the graph, this one could be a contender.

C)

f(x)=-x^2+6x-7\\a=-1,b=6, c=-7\\\\x=\frac{-6}{-2} \\\\x=3

This also could be the equation

D)

f(x)=-x^2-6x-7\\\\a=-1, b=-6, c=-7\\\\x=\frac{6}{-2} \\\\x=-3

This rules option D out.

For this last step, we can look at where the zeroes would be for each equation. (These values are irrational, so we cannot look at specific number)

A)

f(x)=-(x^2-6x-7)

As this equation has a negative value for c, this means that one zero must be positive and the other must be negative.

This means that option A can be ruled out

C)

f(x)=-(x^2-6x+7)

As this equation has a positive value for c, this means that both of the zeroes must be positive. This means that it is the only one that fits all of the criteria.

7 0
3 years ago
If you have a box and the length, width, &amp;height measure 4ft can hold
tankabanditka [31]
4x4x4=64 so its volume is 64
5 0
3 years ago
Other questions:
  • Anoki bought 360 millimeters of fabric. How many centimeters of fabric does Anoki have?
    11·1 answer
  • What is the mean absolute deviation of her math scores?<br> 5.4<br> 6.4<br> 7.8.<br> o<br> 8.8
    15·1 answer
  • How do you do this math problem
    15·1 answer
  • A can of enchilada sauce contain 3 1 /2 servings. If one serving contains 250 mg of sodium, how many grams of sodium are in the
    6·1 answer
  • The function f(t)=-16t^(2)+64 represents the height y (in feet ) of a water droplet t seconds after falling from an icicle. Afte
    15·1 answer
  • Need some help please :)
    12·1 answer
  • Solve for Use your value of x to solve for Please help!
    15·1 answer
  • W.8
    7·1 answer
  • The Clark family bought 8 crates of eggs last week. Each crate had 12 eggs. Since then, they have eaten 28 of the eggs. How many
    14·2 answers
  • Balance on a 20,000 deposit earning 3.5% compounded quarterly after 10 years
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!