Another math problem; algebra help!?

Okay so I dont know how to distribute this problem.

1. 3 - (2 + 3x)

One of these are the answers.

a. 1 - 3x

b. 1 + 3x

c. 5 + 3x

i think i did it right but i just want to make sure i got the correct answer.

Also The property demonstrated in the equation 2(4 - n) = 2(4) - 2(n) is DISTRIBUTIVE right?

If w represents the width of a rectangle 12 inches long with a perimeter of 60 inches, the best algebraic representation of the rectangle's perimeter is

a. 60 + 24w

b. 60 = 24 + 2w

c. 60 = 12w

A garden's length is 3 times its width. It takes 18 meters of fence to enclose the garden. Which equation best represents the perimeter of the garden in one variable?

a. 18 = 6w

b. 18 = 2l + 2w

c. 18 = 2(3w) + 2w

Please help me. I have the answers I just dont know if i did it right.

I want to make sure I got the correct answer since no one in my family knows how to do these

Thanks.

2 Answers

Relevance
  • 1 decade ago

    1. In the first problem you are distributing the negative sign to (2 + 3x)

    so

    -(2+3x)=

    first -(2) = -2

    and

    -(3x) = -3x

    so now we have 3 -( 2+3x ) = 3+ ( -2-3x)

    3 + (-2 - 3x)=

    3 - 2 -3x=

    1 -3x

    Yes your second question is distributive

    Edit:

    woops sorry i thought you said area

    question 3:

    I got

    60 = 24w + 2l

    Question 4:

    C

  • 1 decade ago

    The fisrt one should be 1-x, the 3's cancel each other.

    2) it should be b but you mising a leter, 60=24w+2l.

    3) 3(2l)+2w.

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