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Harrizon [31]
3 years ago
15

Find the midpoint of AB A B . Question 5 options: (4, 4) (1, 1) (3, 1) (10, 4)

Mathematics
1 answer:
zaharov [31]3 years ago
3 0

A (-2, 0)

B (4, 2)

so mid point (x,y) of 2 coordinates(x1,y1) and (x2,y2) is given as

(x,y) = ( (x1+x2)/2 , (y1+y2)/2)

= ( (-2+4)/2, (0+2)/2)

= (2/2, 2/2)

= (1, 1)

so your answer is (1,1) that is option 2

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An object is placed 21 cm from a concave lens of focal length 25 cm. what is the magnification?
wariber [46]

The magnification is 0.54

Given,

The distance between object and concave lens, u = -21 cm

Focal length of the concave lens, f = -25 cm

Let m be the magnification.

m = v/u

Here v is the position of image.

We have to find v first.

By using lens equation we can determine v.

That is,

1/f = 1/v – 1/u

So,

- (1/25) = 1/v – (-1/21)

- (1/25) = 1/v + 1/21

1/v = - (1/25) – 1/21

1/v = (-25 – 21) / (21 x 25)

1/v = - (46/525)

Therefore v = - (525/46)

   v = -11.41 cm

Now we have to find magnification, m.

m = v/u

   = (-11.41) / (-21)

   = 0.54

Here magnification is 0.54

Learn more about concave lens here: brainly.com/question/12944945

#SPJ4

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