3 years ago

#6. Please I really need help

Mathematics

2 answers:

Kaylis [27]3 years ago

5 0

The answer will be $18

vitfil [10]3 years ago

3 0

Answer:

B. $18.00

Step-by-step explanation:

3 books the same cost.

$18.00*3= $54

$ 54+$1.99= 55.99

Hope this helps

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Please help! Find the product AB, if possible. Explain if it's not possible.

soldi70 [24.7K]

Answer: c

Step-by-step explanation:

When multiplying matrices, multiply ACROSS with the left matrix and DOWN with the right matrix.

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$\left[\begin{array}{cc}5&2\\3&-1\end{array}\right] \times \left[\begin{array}{c}2\\3\end{array}\right] =\left[\begin{array}{c}5(2)+2(3)\\3(2)-1(3)\\\end{array}\right] = \left[\begin{array}{c}16\\3\end{array}\right]$