Answer:
B. -2t^2 + 3t - +4 is the answer.
Answer:
I think the answer is B 23,345
Answer: 12 sqrt(5)
Explanation:
First simplify:
= Sqrt(45)
= sqrt(9*5) sqrt of 9 is 3 so bring out 3
= 3sqrt(5)
= 2sqrt(20)
= 2sqrt(4*5) sqrt of 4 is 2 so bring that out and multiply it by 2
= 4sqrt(5)
= 5 sqrt(5) is already simplified
= 3sqrt(5) + 4 sqrt(5) + 5sqrt(5)
= 12 sqrt(5)
Well, 2 2/3 is 2 hrs and 40 mins, and he needs that exact amount to have 7 hrs. So, 7hrs-2 2/3hrs = 4 1/3hrs (4 hours and ten minutes.)