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Semenov [28]
3 years ago
5

3 (x - 3) + x (r + 4)

Mathematics
1 answer:
docker41 [41]3 years ago
7 0

Answer:

Step-by-step explanation:

3(x-3)+x(r+4)

3x-9+xr+4x

7x+9+xr

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Scale drawing of the electronics board
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Step-by-step explanation:

Write ratios to represent the unknown actual length and width of the display to the scale length and width of the display.

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Length= scale÷Actual = 5/36 = 5×36 = 180cm

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= 180cm  × 50cm = 9000 cm2

Area of the electronic board is 9000 cm2

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