ishaanbaruah1738 ishaanbaruah1738

25-03-2019
Mathematics

contestada

What is the value of f(?3) +f(7) f(-3) +f(7) when f(x)=?3x+9 f(x)=-3x+9 ? 18 6 -6 -12

Respuesta :

MrGumby MrGumby

29-03-2019

Answer:

The correct answer is 6.

Step-by-step explanation:

To find this, first find f(-3)

f(x) = -3x + 9

f(-3) = -3(-3) + 9

f(-3) = 9 + 9

f(-3) = 18

Now we do the same for f(7)

f(x) = -3x + 9

f(7) = -3(7) + 9

f(7) = -21 + 9

f(7) = -12

Now we add them together

18 + -12 = 6

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