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Tpy6a [65]
4 years ago
15

There are 200 students in the 8th grade class at Alleghany Middle School. Of these students, 8% play basketball and 14% play soc

cer. Six students play on both teams. What is the probability that a student plays either basketball or soccer?
Mathematics
1 answer:
sergeinik [125]4 years ago
6 0

Answer:

The probability that a student plays either basketball or soccer is 19% or 0.19.

Step-by-step explanation:

Let A be the event that student play basketball and  B be the event that student play soccer.

P(A)=8\%

P(B)=14\%

It is given that 6 students play on both teams.

P(A\cap B)=\frac{6}{200}\times 100=3\%

We have to find the probability that a student plays either basketball or soccer.

P(A\cup B)=P(A)+P(B)-(A\cap B)

P(A\cup B)=8\%+14\%-3\%

P(A\cup B)=19\%

Therefore the probability that a student plays either basketball or soccer is 19% or 0.19.

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Part 1: Ashely earns $15 per hour. Define the variables and state which quantity is a function of the other.
inn [45]
Part 1:
Variable x - number of the hours.
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Part 2 :
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3 years ago
The polynomial -x^3-x^2+12x represents the volume of a rectangular aquatic tank in Cubic feet. The length of the tank is (x+4).
Sliva [168]

Answer:

  A. x(x +4)(3 -x) . . . . a cubic will have 3 linear factors

  B. The dimensions are x, x+4, 3 -x, or 1.694 ft, 5.694 ft, 1.306 ft

  C. x = (√37 -1)/3 ≈ 1.694254 ft

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Step-by-step explanation:

A. The first attachment shows the synthetic division of the given polynomial by x+4. The result is -x^2 +3x = x(3 -x). Hence the factored polynomial is ...

  x(3-x)(x+4) . . . . . . shown as positive

Since the polynomial is a cubic, we know there will be 3 roots. For this problem, that means we expect 3 factors.

__

B. We are apparently to assume that the dimensions of the tank correspond to the three factors:

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For the maximum size tank (see part C), the corresponding measurements in feet are

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C. Tank volume will be maximized when the derivative of volume with respect to x is zero. The derivative polynomial is ...

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Solving this by the usual methods, we find the positive value of x to be ...

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D. Evaluating the polynomial for this value of x gives ...

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3 years ago
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Roman55 [17]

Answer:

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7a + 4(a-2b)

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= 11a - 8b.

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