Math Help

posted by .

I'm not really sure on how to prove statements are right with properties as reasons. How would you solve this?

If x + c = 0, then x = -c
1. x+c=0
2. (x+c)+(-c) = 0 + (-c)
3. x + [c+(-c)] = 0 + (-c)
4. x + 0 = 0 + (-c)
5. x = (-c)

Would 5 be the substitution property?

  • Math Help -

    Does that mean 1 would be be reasoned by the substitution property?

  • Math Help -

    yes i think that's correct coz when we do this sum ,,,we do it in this way

    -c -c (subtracting x both side)
    that is x=-c

  • Math Help -

    Oh, thank you. For number 2, I originally had the definition of addition, but I was marked wrong. I'm not very sure, but wouldn't it be considered the definition of addition if you were adding (-c) to both sides? And also, in this case x+c would equal 0 so that would be the reason you are substituting 0 for x+c in number 2 as well. I don't really understand properties..

  • Math Help -

    yes that's it/......u got it

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics (geometry bit)

    h t t p : / / i m g 4 3 . i m a g e s h a c k . u s / i m g 4 3 / 4 7 4 1 / 9 4 7 4 7 1 1 6 . j p g ok the two read angles are equal to each other because they are complementary if i remeber correctly the only thing we can conclude …
  2. Acc220

    I am not sure how to start the paragraph on explaining balance sheets, income statements, retained earning statements and statements of cash flows...I need a good opening paragraph that will capture the attention of the readers.
  3. math

    prove the following: given: ABCD is a trapezoid with bases BC and AD to prove: BX • AX = DX • CX X is the intersection of the segment going from BD and AC i need the answer in a two column proof statements Reasons 1. ABCD is a …

    what are the missing reasons in the 2 column proof?
  5. Geometry / Proofs

    Given: Triangle ABC with AD bisecting angle BAC, and AE is congruent to ED (both line segments). Prove: AE/AC = BD/BC. Statements Reasons
  6. Quick math help

    I'm on the topic of "Algebra proofs". Is this statement an example of a transitive property?
  7. geometry

    Given: AC perpendicular BD and AB congruent CB. Prove AD congruent CD. It is a kite figure. I need statements and reasons. Problem states Plan: prove triangle ABE congruent CBE. The use congruent corresponding parts AE and CE to show …
  8. Geometry

    I need the statements and reasons for this: ABCD is a parallelogram and we must prove AB=CD and BC=DA. If a quadrilateral is a parallelogram, then its opposite sides are congruent.
  9. Math

    please show me how to do this... A statement Sn about the positive integers is given. Write statements S1, S2, and S3, and show that each of these statements is true. Show your work. Sn:   12 + 42 + 72 + . . . + (3n - 2)2 = n(6n^2-3n-1)/2 …
  10. Geometry

    Write a two-column proof. Given: 7y=8x-14; y=6 Prove: x=7 I need help making a two-column proof with the statements and the reasons, please! Thank you! ( This is what I have so far) Statements | Reasons 1. 7y=8x-14;y=6 | Given 2. 7(6)=8x-14 …

More Similar Questions