What is the correct reason for statement 3?

prove: (2y) ∙ 4 + y = 9y

statements reasons
1. (2y) ∙ 4 + y 1. given
2. 4 ∙ (2y) + y 2. commutative property
3. (4 ∙ 2) ∙ y + y 3.
4. 8y + y 4. commutative property
5. 9y 5. addition

multiplication

distributive property

addition

associative property

.

1 points

question 3

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

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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