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fenix001 [56]
4 years ago
13

When a sound wave uncounters a barrier, what happens?

Mathematics
1 answer:
motikmotik4 years ago
8 0
A. The sound reflects I believe is the answer
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Help on number 8 please
miskamm [114]
Easy find the least common product. In this case just take the values 1 through 5 and multiply each by 15 and 6 and the first equal product is your answer. In the end you should get 30 minutes.
4 0
4 years ago
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<img src="https://tex.z-dn.net/?f=8%3D%5Cfrac%7B5x-1%7D%7B3%7D" id="TexFormula1" title="8=\frac{5x-1}{3}" alt="8=\frac{5x-1}{3}"
alukav5142 [94]

Answer:

x = 5

Step-by-step explanation:

Given

8 = \frac{5x-1}{3}

Multiply both sides by 3 to clear the fraction

24 = 5x - 1 ( add 1 to both sides )

25 = 5x ( divide both sides by 5 )

x = 5

4 0
4 years ago
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Which is greater 2 miles or 3,333 yards
arsen [322]
2 miles is greater! hope i helped
4 0
3 years ago
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Ms. Cole has 4 yards of string. She cuts the string into pieces that are each 1/2 yard long. How many pieces of string does Ms.
saw5 [17]

Answer:

8

Step-by-step explanation:

times the 1/2 (2) by 4 because of half

8 0
3 years ago
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The side of a square is 5 cm more than the side of another square. If the sum of their areas is 625 cm², then the side of the bi
jekas [21]

Answer:

20 cm is the side of the bigger square.

Step-by-step explanation:

Let one square's side be x,

Then another squares side will be ( x + 5 )

  • <em>Formula for square's area: side²</em>

Total area:

  • x² + ( x + 5 )² = 625
  • x² + x² + 10x + 25 = 625
  • 2x² + 10 x + 25 - 625 = 0
  • 2x² + 10x - 600 = 0
  • 2(x² + 5x - 300) = 0
  • x² + 5x - 300 = 0
  • x² + 20x - 15x - 300 = 0
  • x(x + 20) -15(x + 20) =0
  • x = -20, 15
  • x = 15

So one square's side is 15 cm

Then the bigger square has:

  • x + 5
  • 15 + 5
  • 20 cm
6 0
3 years ago
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