Statements Reasons
1. 21 and 22 form a linear pair
1. Given
2. 21 and 22 are supplementary
2. LP. postulate
3. Def. of supplementary
3. mZ1 + m2 = 180°
4. 22 x 24
4. Given
5. 23 24
5. Subsitution
6.
6. 22 23
7.
7. m 2 = mZ3
8.
8. mZ1 + m23 = 180°
9. 21 and 23 are supplementary
9. Def. of supplementary angles

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

answer: what do you mean

where did you get them? if you picked from the grass, is is probably poisonous.

step-by-step explanation: