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Harlamova29_29 [7]
3 years ago
14

Given that Y = 2x^2-96, find x

Mathematics
1 answer:
kari74 [83]3 years ago
5 0
This isn't an equation, so you cannot "solve for x."  However, you can factor, as follows:

y = 2(x^2-49) = 2(x-7)(x+7)

If you decide to set this = to zero, then you can solve for x:  {-7, 7}.
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Lines a and b are parallel<br> What is the value of x<br> 5<br> 10<br> 35<br> 55
arsen [322]

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5

Step-by-step explanation:

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Please help<br><br><br><br> ..........................
Alenkinab [10]

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Step-by-step explanation:

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2 years ago
You throw two four-sided dice. Let the random variable X represent the maximum value of the two dice. Compute E(X). Round your a
Troyanec [42]

Answer:

E(X)=3.125

Step-by-step explanation:

We are given that two four sided dice.

Then , the sample space

{(1,1),(1,2),(1,3),(1,4),(2,1),(2,2),(2,3),(2,4),(3,1),(3,2),(3,3),(3,4),(4,1),(4,2),(4,3),(4,4)}

Total number of outcomes=16

Let the random variable X represent the maximum value of the two dice

Outcomes                            X                                 P(X)

(1,1)                                          1                                 1/16

(1,2),(2,1),(2,2)                                   2                        3/16

(1,3),(2,3),(3,1),(3,2),(3,3)                    3                           5/16  

(1,4),(3,4) ,(2,4),(4,1),(4,2),(4,3),(4,4)    4                            7/16

Using the probability formula

P(E)=\frac{Favorable\;outcomes}{Total\;number\;of\;outcomes}

Now,

E(X)=\sum_{i=1}^{n}x_iP(x_i)

E(x)=1(1/16)+2(3/16)+3(5/16)+4(7/16)

E(x)=\frac{1+6+15+28}{16}

E(x)=\frac{50}{16}=3.125

7 0
3 years ago
Sabrina bought a hoodie at the store when they were having a 25% off sale. If the regular
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3 0
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