The set W = {(0, x2, x3): x2 and x3 are real numbers} is a subspace of R3. False, this set is not closed under addition or scalar multiplication. True, this is the standard subspace of R3. False, this set is not closed under addition but is closed under scalar multiplication. True, this set is closed under addition and scalar multiplication. False, this set is closed under addition but is not closed under scalar multiplication.

Step-by-step explanation: see attachment below

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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easy its decreasing

step-by-step explanation:

because its top point is at the to of the graph on the left side (atleast from the veiw i see it) now if that top point wast in the lower part of the graph it would be increasing hope this have a nice day