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Alex17521 [72]
3 years ago
15

If f =28 when a = 7 find f when a is 10 (direct proportion) ​

Mathematics
2 answers:
QveST [7]3 years ago
6 0

Answer:

f=40

Step-by-step explanation:

f=28, a=7

f \infty a \\ f = ka \\28 = k(7) \\ 28 = 7k \\  \frac{28}{7}  =  \frac{7k}{7}  \\ 4 = k \\ k = 4 \\ f = 4a \\ a = 10 \\ f = 4(10) \\ f = 40

Hope that this is helpful.

Have a nice day.

Alex Ar [27]3 years ago
6 0
F=40
Don’t really know how to explain it tho
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