Answer:
b.
821.9 cube meters
Step-by-step explanation:
Answer: =x2+7x+5
−3x2+2x−4+4x2+5x+9
=−3x2+2x+−4+4x2+5x+9
Combine Like Terms:
=(−3x2+4x2)+(2x+5x)+(−4+9)
=x2+7x+5
jada 2 andre 3 hours
343
Because the 5 rounds 9 to a 10, making the 7 an 8, hence:
342.8
round the 2 to a 3 because the 8 round it up, making it 343
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