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kumpel [21]
3 years ago
5

How many minutes will it take a runner to finish an 11-km race at 18 km/h?

Mathematics
1 answer:
klio [65]3 years ago
4 0
The avg is about 3min
You might be interested in
Sarah is 3 years older than nine times Mario's age. In 10 years, she will be 1 less than triple his
Natasha2012 [34]

Answer:

3(9m + 13) - (m + 10) = 1

Step-by-step explanation:

Here, we want to write an equation we can use to find the age of Mario.

Let the present age of Mario be M

Age of Sarah is 3 years older than 9

times Mario’s age

Mario’s age is thus;

9m + 3

In ten years, she will be 1 less than triple his age

In 10 years time, sarah age will be 9m +

3 + 10 = 9m + 13

Mario age will be m + 10

Mathematically;

3(9m + 13) - (m + 10) = 1

7 0
3 years ago
36. Which side of the triangle in the diagram is the hypotenuse?<br> A X<br> B. Y<br> C. Z
Nikolay [14]

Answer:

C) Z

Step-by-step explanation:

In the right triangle, X and Y are side lengths, while Z is the hypotenuse, so C is the correct answer.

6 0
3 years ago
Read 2 more answers
7. Which dimensions result in the minimum perimeter for a rectangle with area 42.0 cm2?
natali 33 [55]

9514 1404 393

Answer:

  7. d. l = 6.48 cm, w = 6.48 cm

  8. d. square

Step-by-step explanation:

For a given area, the perimeter can always be shortened by reducing the length of the long side and increasing the length of the short side. When you get to the point where you can't do that, then you have the minimum perimeter. You will reach that point when the sides are the same length: the rectangle is a square.

__

7. In light of the above, the best dimensions are √42 ≈ 6.48 cm for length and width.

__

8. In light of the above, the shape is a square.

_____

The attached graph shows the length of one side (x) and the associated perimeter. The other side is 42/x, which will also be 6.48.

8 0
3 years ago
Which of the following statements are true? Select all that apply.
kap26 [50]

b (?) and c

m and n have the same slope (-2/5) so m//n

8 0
3 years ago
If you transform x 2 + y 2 = 25 into 4x 2 + 4y 2 = 25, which option below describes the effect of this transformation on the rad
FromTheMoon [43]

<em><u>Answer</u></em>


c. It divides the radius by 2.



<em>Explanation</em>

The general equation of a circle is

(x-h)² + (y-k)² = r²

Where (h, k) makes the coordinates of the circle and r the radius.


x² + y² = 25 For this equation,


center (0, 0)

Radius = √25 = 5


4x² + 4y² = 25 First simplify this equation

4x² + 4y² = 25 ⇒ x² + y² = 25/4


center (0, 0)

Radius = √(25/4) = 5/2


The radius has been divided by 2


5 0
3 years ago
Read 2 more answers
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