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

03-02-2018

the answer is -

c) 15

Answer Link

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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