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Kay [80]
3 years ago
6

A marathon runner completes a 42km course at an average speed of 7km/h. Calculate the time taken to complete the course.

Mathematics
1 answer:
Flura [38]3 years ago
6 0

Answer:

t = 6 hours

Step-by-step explanation:

Given that,

Average speed, v = 7 km/h

Distance, d = 42 km

We need to find the time taken to complete the course. The average speed is given by :

v=\dfrac{d}{t}\\\\or\\\\t=\dfrac{d}{v}\\\\t=\dfrac{42\ km}{7\ km/h}\\\\t=6\ h

So, the time taken to complete the course is 6 hours.

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So,

We just have to substitute the appropriate words for the operations and grouping symbols.

A. Twenty times the quantity of the difference between y and 3.

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6 0
3 years ago
Can someone help! I think Ik what the answer is but the answer sheet says something different.
mixer [17]
I believe it’s -56.29
8 0
3 years ago
1.8= 2.1h-5.7-4.6h what is h
Sunny_sXe [5.5K]

Answer:

h=-3

Step-by-step explanation:

Combine like terms ( -2.5h )

1.8=-2.5h-5.7

Add 5.7 to 1.8 ( 7.5 )

Bring down -2.5h

the divide ( 7.5/-2.5 )

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6 0
3 years ago
Read 2 more answers
Help or I die,... HELP​
irakobra [83]

Regarding the points on the given line, it is found that:

a) The midpoint is: (3,4.5).

b) The coordinates of C are: C(4,5).

c) The coordinates of the other end of the line are: (4,3).

<h3>Midpoint</h3>

The midpoint between two points is given by the mean of the coordinates of these points.

In this problem, the coordinates of points A and B are given as follows:

A(0,3) and B(6,6).

Hence the coordinates of the midpoint are given as follows:

  • x-coordinate: (0 + 6)/2 = 3.
  • y-coordinate: (3 + 6)/2 = 4.5.

As for point C, we have that C is closer to B then A, hence:

  • The x-coordinate is greater than 3.
  • The y-coordinate is greater than 4.5.

The coordinates are integers, hence it is given as follows:

C(4,5).

As for line AB, it is found that:

  • The other line is parallel, hence the slope is also of 0.5. (change in y divided by change in x is of 0.5).
  • For the x-coordinate, on line AB, they change by 6, hence in the new line they increase by 2/3 x 6 = 4.
  • For the y-coordinate, on line AB, they change by 3, hence in the new line they increase by 2/3 x 3 = 3.

Thus the other endpoint is:

(4,3).

More can be learned about the mid-point of a line at brainly.com/question/18315903

#SPJ1

4 0
1 year ago
What is the sum of two numbers is 45 and theire difference is 5
adelina 88 [10]

Answer:

let the two numbers be x and y

x+y=45(equation 1)

x-y=5(equation 2)

from equation (1) y=45-x(equation 3)

substitute 45-x for y in equation 2

x-(45-x)=5

x-45+x=5

x+x-45=5

2x-45=5

2x=45+5

2x=50

x=50/2

x=25

6 0
3 years ago
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