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3 years ago

8. A tennis match ends at 3.20pm. It was on for 3 hours 50 minutes. When did it start?

Mathematics

1 answer:

konstantin123 [22]3 years ago

7 0

Answer: The tennis match started at 12;30

Step-by-step explanation:

3:20pm - 3 hours = 12:00

one hour= 60 min

60+20=80

80-50= 30

So it started at 12:30

you could print out a picture of a clock to explain to the child how the hours changed or just draw one

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Find the coordinates of the intersection of the diagnosis of the parallelograms (-2,-1) (1,3) (6,3) and (3,-1)

iren [92.7K]

Answer:

$M = (2,1)$

Step-by-step explanation:

Represent the diagonals as:

$A =(-2,-1)$

$B =(1,3)$

$C =(6,3)$

$D = (3,-1)$

Required

Determine the coordinate of the intersection

To do this, we simply calculate the midpoint of AC or BD.

For AC:

$(x_1,y_1) = (-2,-1)$

$(x_2,y_2) = (6,3)$

The midpoint is:

$M = \frac{1}{2}\{(x_1+x_2),(y_1+y_2)\}$

This gives:

$M = \frac{1}{2}\{(-2+6),(-1+3)\}$

$M = \frac{1}{2}\{(4),(2)\}$

$M = (\frac{1}{2} * 4,\frac{1}{2} * 2)$

$M = (2,1)$

For BD:

$(x_1,y_1) = (1,3)$

$(x_2,y_2) = (3,-1)$

The midpoint is:

$M = \frac{1}{2}\{(x_1+x_2),(y_1+y_2)\}$

This gives:

$M = \frac{1}{2}\{(1+3),(3-1)\}$

$M = \frac{1}{2}\{(4),(2)\}$

$M = (\frac{1}{2} * 4,\frac{1}{2} * 2)$

$M = (2,1)$

Notice the midpoints are the same:

$M = (2,1)$

<em>Hence, the coordinates of the intersection is (2,1)</em>

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What am I suppose to do here??

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Answer:

Step-by-step explanation:

Hey There!

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8. A tennis match ends at 3.20pm. It was on for 3 hours 50 minutes. When did it start?​

8. A tennis match ends at 3.20pm. It was on for 3 hours 50 minutes. When did it start?