paigeleahfarbeoy2ork paigeleahfarbeoy2ork
  • 03-02-2018
  • Mathematics
contestada

the function f(x) varies directly with x, and f(x)=45 when x=9 evaluate f(x) when x=3
a) 5
b) 9
c)15
d)27

Respuesta :

annastasia
annastasia annastasia
  • 03-02-2018
the answer is -

c) 15
Answer Link
texaschic101
texaschic101 texaschic101
  • 03-02-2018
f(x) is the same as y

9/45 = 3 / y
cross multiply
(9)(y) = (45)(3)
9y = 135
y = 135/9
y = 15 <==
Answer Link

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