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Rainbow [258]
3 years ago
13

3. Mr. Draper uses 8 nails to secure each

Mathematics
1 answer:
Rashid [163]3 years ago
5 0

Answer:

62.5 boards

Step-by-step explanation:

8/1=500/x

cross product

1*500=8*x

500=8x

x=500/8

x=62.5

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Answer:

See below ~

Step-by-step explanation:

<u>Question 1</u>

  • -7x - y = -1
  • y = 8x + 16

⇒ -7x - (8x + 16) = -1

⇒ -7x - 8x - 16 = -1

⇒ -15x = 15

⇒ x = -1

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⇒ Solution = <u>(-1, 8)</u>

<u></u>

<u>Question 2</u>

  • 3x + 4y = 0
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⇒ 3x + 4(-3x - 18) = 0

⇒ 3x - 12x - 72 = 0

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<u>Question 3</u> (not clear)

<u>Question 4</u>

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⇒ 2x - 6(-5x - 19) = -14

⇒ 2x + 30x + 114 = -14

⇒ 32x = -128

⇒ x = -4

⇒ y = -5(-4) - 19 = 1

⇒ Solution = <u>(-4, 1)</u>

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2 years ago
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It is 300 miles per second
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