f(x)=8x2+x−9 and g(x)=5x2, find (f+g)(x) and (f+g)(−3).

105

Step-by-step explanation:

f(x) = 8x² + x -9

g(x) =5x²

(f+g)(x)  = 8x² + x - 9 + 5x²

Collect like terms

8x² +5x² + x - 9

13x² + x - 9

b) (f+g)(-3) = 13x² + x - 9 when x =-3

= 13×-3² + (-3) - 9

= (13×9) -3 -9

= 117 -3 -9

= 105

I hope this was helpful, please mark as brainliest

answer: for each 3 girls there is 2 boys . 3: 2

hope this ! (:   mark me as brainliest if you can

d

step-by-step explanation: