Es la expresión algebraica que representa la superficie de un terreno rectangular, si su longitud es 3
veces más grande de su ancho.
a) (3X)(X)
b) 3X -X
c) 3X + X
d) 3(X+X)

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step-by-step explanation:

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step-by-step explanation:

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an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110