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5 votes
-2(5j + 2k) is equal to:

a) 10j + 4k
b) -10j + (-4k)
c) -10j + 4k
d) -10j - (-4k)

1 Answer

6 votes

Final answer:

The expression -2(5j + 2k) simplifies to -10j - 4k, which matches option b) -10j + (-4k).

Step-by-step explanation:

The expression -2(5j + 2k) can be simplified by distributing the multiplication of -2 across the terms within the parentheses. We multiply -2 by 5j to get -10j, and multiply -2 by 2k to get -4k. Therefore, the expression simplifies to -10j - 4k, which corresponds to option b) -10j + (-4k) if we recognize that subtracting a positive is the same as adding a negative.

User J Ashley
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