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Art [367]
3 years ago
6

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. 


4 0
3 years ago
Simplify
melomori [17]

Answer: 4\sqrt{3}

Step-by-step explanation:

For this exercise it is important to remember the following:

i=\sqrt{-1} \\\\i^2=-1

Given the following expression:

-2i\sqrt{-12}

You can notice that the radicand (the number inside the square root) is negative. Therefore, in order to simplify the expression, you need to follow these steps:

1. Replace \sqrt{-1} with i and simplify:

(-2i)(i)\sqrt{12}=-2i^2\sqrt{12}=-2(-1)\sqrt{12}=2\sqrt{12}

2. Descompose 12 into its prime factors:

12=2*2*3=2^2*3

3. Substitute into the expression:

=2\sqrt{2^2*3}

4. Since \sqrt[n]{a^n}=a, you can simplify it:

=(2)(2)\sqrt{3}=4\sqrt{3}

4 0
3 years ago
At 8:00 am yesterday, the temperature was 11°C. By noon, it was 3º warmer. By
morpeh [17]

Answer:

It would be 5 degrees hope this helped

6 0
3 years ago
Jacob followed a recipe that requires 2 cups of water for ever 3 cups of flour. If he used 8 cups of flour, how many cups of wat
weeeeeb [17]

Answer:12

Step-by-step explanation:

3 divided by 2 = 1.5

1.5x8=12

He used 12 cups of water

Have A Good Day

4 0
3 years ago
Luther earned some money doing odd jobs last summer and put it in a savings account that earns 3% interest compounded quarterly
inysia [295]

The function we have to use in this case is

m(t)=m_o\cdot(1+\frac{0.03}{4})^{4t}

where mo is the initial amount of money. After 2 teats we get that

\begin{gathered} m_0\cdot(1+\frac{0.03}{4})^8=800 \\ m_0\cdot1.06=800 \\ m_0=\frac{800}{1.06}\approx754.71 \end{gathered}

SO he earned 755 approximately

8 0
1 year ago
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