lelliott86
28.08.2021 •
Mathematics
Si un florero (7) cuesta $ 23.00 más que el doble de una jarra (x), ¿Cuál es la
expresión algebraica que representa correctamente el costo del florero?
a) Y=ax/2 +23
b) Y= 2x +23
c) Y= x cuadrada + 23
d) Y= a(2x +23)
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Ответ:
i assume you mean 3x^2 + 16y = 0
so y = -3/16 x^2
The vertex is at the origin (0,0) answer
x^2 = -16/3 y
compare with standard form x^2 = 4ay:-
the focus y coordinate of the a = -16/3 / 4
= -16/12 = -4/3 so the focus is (0, -4/3) answer
and the directrix is y = 4/3 answer