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3 years ago

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

Mathematics

1 answer:

AnnyKZ [126]3 years ago

6 0

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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