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sesenic [268]
2 years ago
15

Two particles are on a spinning disk. Particle A is 12 cm away from the center, while particle B is 15 cm away from the center.

If it takes 6 seconds to make a rotation, what is the linear velocity of each particle, in centimeters per second?
Select the correct answer below:


Linear velocity of particle A is 2 cm/sec, and particle B is 2.5 cm/sec.

Linear velocity of particle A is 2π cm/sec, and particle B is 5π2 cm/sec.

Linear velocity of particle A is 4 cm/sec, and particle B is 5 cm/sec.

Linear velocity of particle A is 4π cm/sec, and particle B is 5π cm/sec.
Mathematics
1 answer:
Dahasolnce [82]2 years ago
8 0

Answer:

Step-by-step explanation:

circumference for A=2π×12=24π

linear velocity=24π÷6=4π cm/sec

circumference for B=2π×15=30π

linear velocity=30π÷6=5π cm/sec

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What is the answer to 5x=3x-8
miv72 [106K]

Answer:

x=-4

Step-by-step explanation:

5x=3x-8 you subtract 3x from both sides.

2x=-8 then you divide by the number next to the x. meaning 2

x=-4

4 0
3 years ago
Read 2 more answers
Solve the equation for y. 8y+35=3y
Luda [366]

Answer:

y = - 7

Step-by-step explanation:

Given

8y + 35 = 3y ( subtract 3y from both sides )

5y + 35 = 0 ( subtract 35 from both sides )

5y = - 35 ( divide both sides by 5 )

y = - 7

8 0
4 years ago
Carlota wrote the equation y + 1 = 2 (x - 3) for the line passing through the points (-1, 3) and (2, 9). Explain and correct her
Art [367]

For this case we have the following equation:


y + 1 = 2 (x - 3)

That can be rewritten in the form y = mx + b

Where:


  • m is the slope of the line
  • b is the cut point

So, we have:


y + 1 = 2 (x - 3)\\y + 1 = 2x-6\\y = 2x-6-1\\y = 2x-7

Where:


m = 2 is the slope


b = -7 is the cut point


Carlota has the following points:


(-1, 3) and (2, 9)


To know if the line y = 2x-7 passes through these points, we must replace them in the equation and the equality must be fulfilled. So:


Point (-1, 3):


Substituting:


3 = 2 (-1) -7\\3 = -2-7

3 = -9 It's false, equality is not met. The point (-1, 3) does not go through the line.


The equation written by Carlota is erroneous, the procedure to follow is:


Given(x1, y1) = (- 1, 3) and(x2, y2) = (2, 9), we find the slope:


m=\frac{(y2-y1)}{(x2-x1)}

m=\frac{(9-3)}{(2-(-1))}

m=\frac{6}{3}

m=2

We observe that the slope found by Carlota is the same. Let's see cut point "b". For this we substitute any of the points given in the equation:


y = 2x + b

Substituting (2,9) we have:


9 = 2 (2) + b\\9 = 4 + b\\b = 9-4\\b = 5

Thus, Carlota's error was at the cut-off point. The correct equation of the line that passes through the given points is y = 2x + 5

Answer:


The correct equation of the line that passes through the given points is y = 2x + 5

Carlota's mistake was at the cutoff point


5 0
3 years ago
The mean temperature for the first 7 days in January was 6 °C.
charle [14.2K]

Answer:

3.5 degrees celcius for first 8 days

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Complete the square: a^2 - 2a - 8=0
yarga [219]
A² - 2a - 8 = 0
(a - 4) (a + 2) = 0
a - 4 = 0 or a + 2 = 0
a = 4 or a = -2
4 0
4 years ago
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