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3 years ago

14

Need help please anyone

1 answer:

Svetllana [295]3 years ago

3 0

9514 1404 393

Answer:

A) The angles marked ∠7 and ∠8 are vertical angles.

B) The angles marked with expressions in y are also vertical angles, so those expressions are equal to each other. Stating this in equation form gives an equation that can be solved for y.

C) y = 24; ∠7 = ∠8 = 89°

Step-by-step explanation:

A) The angles marked ∠7 and ∠8 are vertical angles, comprised of opposite rays and having a common vertex.

__

B) The angles marked with expressions in y are also vertical angles. Vertical angles are congruent, so those expressions are equal to each other. Stating this in equation form gives an equation that can be solved for y.

__

C) (5y-29)° = (3y+19)°

2y = 48 . . . . . . . . . . . . divide by °, add 29-3y

y = 24 . . . . . . . . . divide by 2

Angles 7 and 8 are supplementary to the angles marked with expressions in y.

∠7 = ∠8 = 180° -(5y -29)° = 209° -5(24)°

∠7 = ∠8 = 89°

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