As an invasive species, baby’s breath a) is considered an abiotic factor. b) becomes part of a climax community. c) displaces native species. d) is part of a predator-prey relationship. e) necessitates a trophic cascade.

if triangle abc is congruent to triangle def, their interior angles are congruent, because congruent parts of congruent triangles are congruent (cpctc).

that means ∠d is congruent to ∠a; ∠d is equal to 8x - 2.

interior angles of all triangles add to equal 180 degrees, so you can set the sum of these interior angle values equal to 180 and solve for x.

180 = (8x - 2) + 22 + 72

180 = 8x - 2 + 22 + 72

180 = 8x + 92

88 = 8x

11 = x

x = 11

it would take 95 years for that supernova to be visible on earth, so the year would be about 2113. i hope i did my calculation right.

the answer is b.

hope is