WILL GIVE BRANLYEST (IF CORRECT) What is the tundra’s permanently frozen layer of ground called? 
permafrost

soil frost

ground layer

active soil

permafrost

Explanation:

b because it can only be win one time and lose at one time

explanation:

there are chances on rare cases

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