Your answer is in the picture above
Answer:
Texting speed
Step-by-step explanation:
For this case we have a function of the form
, where 
We must find the value of the function when
, that is, we must find f (3). So:

So
Answer:

Hello :
if : a <span>≡ 5 ( mod 7) ....(1)
b </span><span>≡ 6 ( mod 7) ...(2)
(1)×(2) : ab </span><span>≡ 30 ( mod 7)
</span>but : 30 = 7×4 + 2 ..... so : 30 ≡ 2 ( mod 7)
then : ab ≡ 2 ( mod 7)