<span>Un cubo tiene seis caras.
</span>Las dos imágenes ayudan a explicar. Uno de los cubos es un cubo transparente.<span> Por otro cubo es cubo hueco que se ha desplegado.</span> E<span>spero que esto ayude</span>
Step-by-step explanation:
(2x-y+3)(2x-y-3)=
4x²-2xy-6x-2xy+y²+3y+6x-3y-9=
4x²-4xy+y²-9=
(2x-y)²-9
Answer:
B=112
Step-by-step explanation:
Angle B is on the same line as angle A(68). They would need to combine for a total of 180 degrees. So 68-180=112
Number 4: line XZ; number 5: theory of congruent triangles.