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Rina8888 [55]
3 years ago
15

Need help with this questions please.

Mathematics
2 answers:
krek1111 [17]3 years ago
7 0

Answer:

Below

Step-by-step explanation:

Angle on a straight line =180

40\° + (15x +20)\°=180\°\\\\40 \°+(15(8)+20)\° =180\°\\\\40\°+(120+20)\°=180\°\\\\40\°+140\°=180\°\\\\180\°=180\°

hammer [34]3 years ago
4 0

Answer: x=8

Step-by-step explanation:

15*8 = 120 + 20 = 140

140+40 = 180 a perfect line

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The width of a rectangle is 12 inches more than the length. The perimeter is 76 inches. Find the width and the length.
stira [4]

Answer:

The length of the rectangle is 13 inches and its width (13 + 12) is 25 inches.

Step-by-step explanation:

You have to consider the formula of the perimeter = 2·length + 2·width.

If we call "x" to the length ⇒ width = x + 12 .

Perimeter = 2x + 2·(x + 12) ⇒ Perimeter = 2x + 2x + 24

⇒Perimeter = 4x + 24. ⇒ 76 = 4x + 24 ⇒ 76 - 24 = 4x ⇒52 = 4x

⇒ 52/4 = x ⇒ x = 13.

So, the length of the rectangle is 13 inches and its width (13 + 12) is 25 inches.

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3 years ago
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Tasya [4]

Answer:

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2 years ago
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3 years ago
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Answer:

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