Answer :

1/2 x^3 + 3.4y when x = 4 and y = 2
1/2(4)^3 + 3.4(2)
1/2 (64) + 6.8
32 + 6.8 = 38.8

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Rewritten by : Barada

Answer:

1/2 x^3 + 3.4y when x = 4 and y = 21/2(4)^3 + 3.4(2)1/2 (64) + 6.832 + 6.8 = 38.8

Step-by-step explanation: