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Arlecino [84]
3 years ago
13

Find the average rate of speed, expressed in miles per hour (unit rate). A post office truck delivered mail on a 9-mile route in

2 hours.
please help ! D:
Mathematics
1 answer:
Fed [463]3 years ago
8 0

Answer:

4.5 miles per hour

Step-by-step explanation:

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If x=at^3 and y=bt^2 then find dy/dx
Molodets [167]
Dy/dx = (dy/dt) / (dx/dt)

dy/dt = 2bt

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therefore dy/dx = 2bt/3at^2
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3 years ago
What is the primary goal and secondary goal of the Fried Liver Opening in chess? <br />
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Play usually continues 7.Qf3+ Ke6 8.Nc3 (see diagram). Black will play 8...Nb4 or 8...Ne7 and follow up with c6, bolstering his pinned knight on d5. If Black plays 8...Nb4, White can force the b4 knight to abandon protection of the d5 knight with 9.a3?! Nxc2+ 10.Kd1 Nxa1 11.Nxd5, sacrificing a rook, but current analysis suggests that the alternatives 9.Qe4, 9.Bb3 and 9.O-O are stronger. White has a strong attack, but it has not been proven yet to be decisive.

Because defence is harder to play than attack in this variation when given short time limits, the Fried Liver is dangerous for Black in over-the-board play, if using a short time control. It is also especially effective against weaker players who may not be able to find the correct defences. Sometimes Black invites White to play the Fried Liver Attack in correspondence chess or in over-the-board games with longer time limits (or no time limit), as the relaxed pace affords Black a better opportunity to refute the White sacrifice.


3 0
3 years ago
Continue the pattern 31, 5, 32, 10, 33, 15, blank blank blank
klemol [59]

Answer:

34, 20, 35, ...

Step-by-step explanation:

From what I see, it is alternating between two patterns: +5 starting at 5, and +1 starting at 31.

7 0
3 years ago
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Answer:

203 Ibs of butter

Step-by-step explanation:

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