If matrix A and matrix B, what is the element in row 2, column 3 of 3A - 2B?

Question 36

EasyOriginal question

If $A = \begin{bmatrix}1 & 4 & -2 \\ 0 & 3 & 5\end{bmatrix}$ and $B = \begin{bmatrix}2 & -1 & 3 \\ 4 & 0 & -2\end{bmatrix}$ , what is the element in row 2, column 3 of $3A - 2B$ ?

7

Correct answerYour answer

11

Correct answerYour answer

13

Correct answerYour answer

19

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer D

Correct answer: D

Worth noting

11 loses the sign: $-2 \times (-2)$ is $+4$ , not $-4$ .

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