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andreyandreev [35.5K]
3 years ago
13

HELP PLEASE

Mathematics
2 answers:
soldier1979 [14.2K]3 years ago
6 0
F(2)=7(2)-5=14-5=9
g(4)=4(4)=16
f(2)-g(4)=9-16=-7

f(2)-g(4)=-7
B
Soloha48 [4]3 years ago
5 0
Do you see that when we change

f(x) = 7x - 5 

to 

f(2) = 7(2) - 5

we are simply saying to substitute in 2 for x? Well that is what we are doing:

f(2) = 7(2) - 5

f(2) = 14 - 5

f(2) = 9 

Now we find g(4) the same way:

g(x) = 4(x)

g(4) = 4(4)

g(4) = 16

Now we find the difference of the two functions:

f(2) - g(4)

9 - 16

-7

So, the answer is B.
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