NessaBomb24 NessaBomb24

08-07-2017
Mathematics

contestada

If a = kb where k is a constant and a = 12 when b = 15, what is the value of a when b =12?
A. 4/5
B. 5/4
C. 9 AND 3/5
D. 12
PLEASE SHOW HOW YOU GET YOUR ANSWER!

Respuesta :

taylortr taylortr

08-07-2017

a = kb

12 = k15
divide equation by 15 to make k the subject.
k = 4/5 or 0.8

a = kb
a = 0.8 x 12
a = 9.6

(0.6 as a fraction is 3/5)

therefore, a = 9 and 3/5

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