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Lelu [443]
1 year ago
8

A rectangular image of length 5 cm and width 7 cm is magnified in a studio. On magnification, 1 cm of the image represents 15cm.

Find the perimeter of the rectangle in the magnified image.
Answers:
360 cm
180 cm
440 cm
84 cm
Mathematics
2 answers:
Andre45 [30]1 year ago
8 0

Answer:

238 cm

Step-by-step explanation:

so we have a scale factor   of  17: 1

originally we had the dimensions:   3cm by 4m

now we have    3*17  by 4*17  = 51 cm by 68 cm

Perimeter = 2*51 + 2*68 = 238 cm

AVprozaik [17]1 year ago
8 0

Answer:

360 cm

Step-by-step explanation:

The height of the magnified image is the product of the height of the original image and the scale factor.

h=15(7) cm.

Simplify.

h=105 cm.

The width of the magnified image is the product of the width of the original image and the scale factor.

w=15(5) cm.

Simplify.

w=75 cm.

So, the perimeter is

P=2(75)+2(105) cm.

Simplify.

P=360 cm.

Therefore, the perimeter of the painting is 360 cm.

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Simplify the following expression. 3 2/5x3(-7/5)
Studentka2010 [4]

The simplified expression of 32/5 x 3(-7/5) is  -672/25

<h3>How to simplify the expression?</h3>

The mathematical expression is given as:

32/5 x 3(-7/5)

Evaluate the product of 3 and -7/5

32/5 x 3(-7/5) =  32/5 x -21/5

Evaluate the product of 32 and -21

32/5 x 3(-7/5) =  672/5 x -1/5

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So, we have:

32/5 x 3(-7/5) =  -672/25

Hence, the simplified expression of 32/5 x 3(-7/5) is  -672/25

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