If it takes eight men ten hours to build a wall, how long would it take four men?

Mathematics

2 answers:

zmey [24]3 years ago

8 0

Answer:

ha ha is it math question seriously or riddle if riddle the wall is already built by men they non time is taken by men.

Darya [45]3 years ago

4 0

Answer:

20 bc if 8 men took 10 hours then 4 men would take double the time

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Bobby wants to go on a school trip that will cost him $250. He comes up with an equation that represents how much he needs to sa

monitta

Yes, Bobby will have enough money if he saves for 9 weeks. You can find this through either substituting w for 9 in the equation, or solving the equation itself.

Substituting:

$25(9)+30$
Substitute w for 9.

$225+30$
Simplify.

$225+30=255$
Solve.

255 is greater than 250, so yes, he will have enough money saved.

Solving the equation:

$25w+30=250$
Original Equation

$25w=220$
Subtract 30 from both sides.

$w=8.8$
Divide both sides by 25.

The number of weeks he needs is 8.8. When rounding it up, you get 9.

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3 years ago

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melomori [17]

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For this exercise it is important to remember the following:

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$-2i\sqrt{-12}$

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