j111111111111111
j111111111111111 j111111111111111
  • 26-02-2021
  • Mathematics
contestada

F is directly proportional to a . If F = 28 when a = 7 find, a when F = 40

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Respuesta :

ayfat23
ayfat23 ayfat23
  • 03-03-2021

Answer:

a=10

Step-by-step explanation:

The question can be interpreted as

F∝a

If we introduce proportionality constant k, we have

F= k.a

28= k. 7

k= 28/7

k= 4

Then the equation can be written as

F= 4.a

To find, a when F = 40?

F= 4.a

40=4 × a

a= 40/4

a= 10

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