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Crank
2 years ago
8

Write an expression that represents the sum of a number x and 11​

Mathematics
1 answer:
Helen [10]2 years ago
3 0

Answer:

x+11

Step-by-step explanation:

here is the equation

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Fantom [35]

Answer:

4.5 / B

Step-by-step explanation:

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2 years ago
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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

6 0
2 years ago
Identify three of the key terms from the video. Check the boxes next to three words.
Svetradugi [14.3K]
Memory
<span>brain
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5 0
3 years ago
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Distribute the negative number and simplify. <br><br> -7(2 - 3x)
navik [9.2K]
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PLEASE HELP ASAP URGENT! What is the area of this figure?
weqwewe [10]

Answer:

a= 81m^2

Step-by-step explanation:

we know the top triangle: the base is 9

a = 1/2(bh)

a = 1/2 (9 x 8)

a = 1/2 (72)

a = 36

the parallelogram at the bottom has base 9 and height 5

a = bh

a = 9 x 5

a = 45

add them together 36 + 45 = 81

8 0
2 years ago
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