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Marrrta [24]
3 years ago
6

The perimeter of a playing card is 30 centimeters. It is 9 centimeters tall. How wide is it?PLS HELP!

Mathematics
2 answers:
zlopas [31]3 years ago
8 0

Answer:

6 cm.

Step-by-step explanation:

The perimeter = 2(H + W) where H = height and W = width. So we have:

30 = 2(9 + W)

30 = 18 + 2W

2W = 30 - 18 = 12

W = 6 cm.

Gre4nikov [31]3 years ago
3 0
To find perimeter you need to add all sides of the card. Since the card is 9cm tall, you will add two sides of 9cm which would be 18. Now you subtract 18 from the perimeter (30-18) and you should get 12. Then you divide 12 by two and get the width.
The playing card is 6cm wide.
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<em><u>Replace all x's with 4.</u></em>

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The variable y is directly proportional to the variable x. If y = 32 when x = 20, what is the value of x when y = 40?
elena55 [62]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
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Arlecino [84]

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3 0
3 years ago
この問題を最も簡単に解決する. 不適切な回答はありません.
Dafna1 [17]

japones ^^

look you have to multiply

8 cm x 6cm

20cm x 6 cm

and the answer that comes out of the multiplication is the correct one

4 0
3 years ago
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