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Ymorist [56]
1 year ago
15

ABC High School is debating whether or not to write a policywhere all students musthave uniforms and wear them during school hou

rs. In a survey,45% of the studentswanted uniforms, and 55% did not.Calculate the probability that a person selected at random fromABC High School will want the school to have uniforms or willnot want the school to have uniforms.
Mathematics
1 answer:
larisa [96]1 year ago
6 0

If 45% don't want uniforms, it means that 45 out of 100 students don't want them, so the probability is 45/100 = 9/20

And 55% want unifrms, so the probability = 55/100 = 11/20

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3 sqrt 5

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Select all the pairs that could be a reasonable approximation for the diameter and the circumference of a circle explain your re
Lady_Fox [76]

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Step-by-step explanation:

Throughout this question, the choices were missing that's why its correct solution can be defined as follows:

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4 0
2 years ago
The general equation for a circle is a(x^2 + y^2) + bx + cy + d = 0. There is exactly one circle passing through the points (3,-
lidiya [134]

Answer:

The equation for this circle is 2c(x²+y²) - 8cx + cy = 0

Step-by-step explanation:

We can solve this problem replacing each of the points in the general equation and then solving the system of equations.

The fact that the circle passes by the point (3,-2) means that when x = 3, y = -2. So:

a(3^{2} + (-2)^2) + 3b - 2c + d = 0

13a+ 3b - 2c + d = 0

For (1, -2)

a(1^{2} + (-2)^2) + b - 2c + d = 0

5a + b - 2c + d = 0

For (0,0)

a(0^{2} + (0)^2) + 0b - 0c + d = 0

d = 0

Now we have to find a,b,c, from the following equations

13a+ 3b - 2c = 0

5a + b - 2c = 0

Since we have variables and 2 equations, i am going to write a and b as functions of c.

13a + 3b = 2c

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I will write b in the second equation as a function of a and c, and replace in the first equation

b = 2c - 5a

---------

13a + 3(2c-5a) = 2c

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b = -8c

The solution for the system is (a,b,c) = (2c, -8c, c). So the equation for this circle is 2c(x²+y²) - 8cx + cy = 0

6 0
3 years ago
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