Many of houses have fireplaces that are 15 percent efficient and use 15 kg of wood to heat a room to 20 degrees celsius. wanting to reduce their ecological footprint, several of the homeowners are considering switching to wood stoves that are 75 percent efficient. if they do change to using wood stoves, how many kilograms of wood will they save per use?

provisions of the banking.

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