Given: line p is parallel to line r. prove: ∠1 is supplementary to ∠7. statement reason 1. line p is parallel to line r. 1. 2. ∠2≅∠7 2. 3. m∠2=m∠7 3. 4. ∠1 and ∠2 form a linear pair. 4. 5. ∠1 is supplementary to ∠2. 5. 6. m∠1+m∠2=180° 6. 7. m∠1+m∠7=180° 7. 8. ∠1 is supplementary to ∠7. 8.

Given,

p and r are parallel lines,

We have to prove that : ∠1 is supplementary to ∠7.

Thus, the column prove would be,

        Statement                                             Reason

1. Line p is parallel to line r.                 1. Given

2. ∠2≅∠7                                             2. Exterior alternate angle theorem,

3. m∠2=m∠7                                        3. Property of congruence,

4. ∠1 and ∠2 form a linear pair.          4. Adjacent angle on straight line,

5. ∠1 is supplementary to ∠2             5. Linear pair postulate

6. m∠1+m∠2=180°                                6. Supplementary angle property

7. m∠1+m∠7=180°                                 7. Substitution property

8. ∠1 is supplementary to ∠7               8. Supplementary angle property

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.

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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