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blagie [28]
3 years ago
6

MATH HELP! I'm trying to use dot products and vectors for my Pre-calc class..:

Mathematics
2 answers:
Kamila [148]3 years ago
3 0
2v = <-10, 4>
4u = <-24, 4>
-4u = <24, -4>

-4u + 2v = <24, -4> + <-10, 4> = <14, 0>
rodikova [14]3 years ago
3 0
-4u+2v=-4*(-6,1)+2*(-5,2)=((-4)*(-6)+2*(-5),(-4)*1+2*2)=(24-10,-4+4)=(14,0)
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Evaluate f(x) = sqrt(5x + 4) for x = 12
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Work Shown:

f(x) = sqrt(5*x + 4)

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Each of the 25 balls in a certain box is either red, blue or white and has a number from 1 to 10 painted on it. If one ball is t
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Answer:

Not sufficient information

Step-by-step explanation:

Probability of white ball: P(W)

Probability of even number: P(E)

Probability of white ball or even number: P(W∨E) is asked

Considering case (1):

Probability of white ball and even number: P(W∧E) = 0

And we know that,

P(W∨E) = P(W) + P(E) - P(W∧E) = P(W) + P(E) - 0 = P(W) + P(E)

It is not sufficient to calculate the desired probability.

Considering case (2):

P(W) - P(E) = 0.2

Here, it is possible for P(W) and P(E) to get multiply values.

So P(W∨E) cannot be determined.

Considering cases (1) & (2):

P(W∧E) = 0 and P(W) - P(E) = 0.2

So, P(W∨E) = P(W) + P(E) = P(E) + 0.2 + P(E) = 2P(E) + 0.2

Again multiple answers are possible.

Such as, for P(E) = 0.4 (10 even balls) ⇒ P(W∨E) = 1

but for P(E) = 0.2 (5 even balls) ⇒ P(W∨E) = 0.6

So, the information are not sufficient.

3 0
3 years ago
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