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ZanzabumX [31]
3 years ago
15

If the probability that it will rain tomorrow is 1/5, what is the probability that it will not rain tomorrow? A 4/5 B 3/5 C 2/5

D 2/10
Mathematics
2 answers:
kipiarov [429]3 years ago
7 0
A. 4/5

P(A)’ = 1 - P(A)

1 - 1/5 = 4/5
Natali5045456 [20]3 years ago
3 0

Answer:

A

Step-by-step explanation:

Because if the chance of rain is 1/5 you just got to think because the remainder is 4/5 so all together it is 5/5

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Given: A, B, and C What is the value of X in the matrix equation AX + B = C?
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Answer:

Option (2)

Step-by-step explanation:

Given expression is, AX + B = C

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AX = C - B

C - B = \begin{bmatrix}-42 & -20\\ 5 & 4\end{bmatrix}-\begin{bmatrix}-7 & -9\\ 4 & -1\end{bmatrix} = \begin{bmatrix}-42+7 & -20+9\\ 5-4 & 4+1\end{bmatrix}

C - B = \begin{bmatrix}-35 & -11\\ 1 & 5\end{bmatrix}

Let  X=\begin{bmatrix}a & b\\ c & d\end{bmatrix}

AX = \begin{bmatrix}-3 & -4\\ 1 & 0\end{bmatrix}\times \begin{bmatrix}a & b\\ c & d\end{bmatrix}

     = \begin{bmatrix}(-3a-4c) & (-3b-4d)\\ a & b\end{bmatrix}

Since AX = C - B

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Therefore, a = 1, b = 5

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And (-3b - 4d) = -11

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Therefore, Option (2). X = \begin{bmatrix}1 & 5\\ 8 & -1\end{bmatrix} will be the answer.

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