lesliejmckenna
lesliejmckenna lesliejmckenna
  • 04-08-2019
  • Mathematics
contestada

If b is inversely proportional to c, and b is 5 when c is 12, find b when c = 20.

A. b = 60
B. b = 4
C. b = 15
D. b = 3

Respuesta :

Gasaqui
Gasaqui Gasaqui
  • 04-08-2019

Answer:

b=3

Step-by-step explanation:

If b is inversely proportional to c then

[tex]b=\frac{k}{c}[/tex]

b is 5 when c is 12, means...

[tex]5=\frac{k}{12}[/tex]

From where we obtain the value of k, the constant needed, which is equals to 5*12=60

Now... to find b when c=20, is just a matter of using our known variables.

[tex]b=\frac{60}{20}=3[/tex]

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