(7b^2 + 3b^4) + (2b^2 + 4b^3) + (8b^3 + 6b^4 + 9b^2)

(18b^2 + 9b^4) + (12b^3)

Step-by-step explanation:

(7b^2 + 3b^4) + (2b^2 + 4b^3) + (8b^3 + 6b^4 + 9b^2)

(9b^2 + 3b^4) + (4b^3) + (8b^3 + 6b^4 + 9b^2)

  (18b^2 + 3b^4) + (4b^3) + (8b^3 + 6b^4)

   (18b^2 + 9b^4) + (4b^3) + (8b^3)

    (18b^2 + 9b^4) + (12b^3)

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !

i dont know sorry

step-by-step explanation: