Me podrían explicar el método de diferencias de las sucesiones cuadraticas, por favor?

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step-by-step explanation:

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x