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77julia77 [94]
3 years ago
12

Is - 4 the absolute value of 3 - 7? Explain.

Mathematics
1 answer:
dlinn [17]3 years ago
5 0

Answer:

No

Step-by-step explanation:

This is because the definition of absolute value is the number of units or points from zero on a number line. The regular answer of 3-7 would be -4. But the absolute value of -4 is 4 because it is just regularly 4 digits away from zero on a number line. Make sense?

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What is the factored form of the expression x^2 + 3x-4?
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Answer:

(x-4)(x-4)

Step-by-step explanation:

Because the factors of 16 that add up to -8 can be -4 and -4.
Let's plug it in...
<em>16 - 32 + 16 = 0

It works!!!</em>

ANswer is (x-4)(x-4)

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3 years ago
For a continuous random variable X, P(20 ≤ X ≤ 40) = 0.15 and P(X &gt; 40) = 0.16. Calculate the following probabilities. (Leave
yan [13]

Answer:

For a continuous random variable X, P(20 ≤ X ≤ 40) = 0.15 and P(X > 40) = 0.16.

Step-by-step explanation:

Here, P(x > 40) = 0.16

a). P(x < 40) = 1 - P(x > 40)

                   =  1 - 0.16

                    = 0.84

b). P(x < 20) = 1 - P(x\geq 20)

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                    = 0. 69

c). P(x = 40) = 0; The probability that a continuous variable assume a particular value is zero.

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