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Zigmanuir [339]
4 years ago
6

It took 2 men 5 hours to build an airstrip. Working at the same rate, how many additional men could have been hired in order for

the job to have taken 1/hour less? (A) Two (B) Three (C) Four (D) Six
Mathematics
1 answer:
Nikitich [7]4 years ago
3 0

Answer with explanation:

Time taken by 2, men to build an airstrip = 5 hours

Time taken by 1, men to build the airstrip = 2 × 5

                              =10 hours

Since ,time is inversely proportional to Number of people working and if rate of doing work is Higher time will be less.

Using Unitary method

M_{1}T_{1}R_{1}=M_{2}T_{2}R_{2}\\\\R_{1}=R_{2}\\\\T_{2}=4\\\\2 \times 5 \times R_{1}=M_{2}\times 4\times R_{2}\\\\M_{2}=\frac{10}{4}\\\\M_{2}=2.5

Number of Men can't be a fraction.So total number of men should be 3 to accomplish the work in 4 Hours.

Earlier 2, men were working to complete the work in 5 days.

Now, 3 men are working to accomplish the work in 4 days.

So,Total number of extra men Added

      = 3-2=1

None of the option , matches with the Answer i got.

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4(-8x + 5) - (-33x - 26) =
rosijanka [135]
<h2>4(-8x + 5) - (-33x - 26) =</h2><h2>-32x + 20 + 33x + 26=                      (distributive)</h2><h2>-32x  + 33x + 26 + 20=                     (combine like terms)</h2><h2>  x + 46</h2>

Hope it helps.

8 0
3 years ago
The image of the point (6, -9) under a translation is (11,-4). Find the coordinates
yaroslaw [1]

Answer:

( - 6 , - 1 )

Step-by-step explanation:

Let's find the rule of that transformation:

1 +  = 4 ⇒  = 3

9 +  = 10 ⇒  = 1

Thus, the rule of given transformation is ( x + 3 , y + 1 )

So, the image of the point ( - 9 , - 2 ) is

( - 9 + 3 , - 2 + 1 ) = ( - 6 , - 1 )

3 0
2 years ago
Read 2 more answers
juan needs to measure 6 cups of flour for a recipe.he only has a 1/4 cup measuring cup.how many times must he fill the measuring
Luba_88 [7]

Answer:

Juan would need to fill up the 1/4 measuring cup 24 times.

Step-by-step explanation:

So to measure one cup of flour with a 1/4 measuring cup, you would need to fill up the 1/4 measuring cup 4 times. Since we want 6 cups, you would need to fill up the 1/4 measuring cup 24 times. 6 times 4 = 24. Hope this helps!

7 0
4 years ago
Please help me with my work THANK YOU A LOT
inessss [21]

Answer:

A.)

Step-by-step explanation:

The answer that you had chosen is correct, because the number line is stating that you are subtracting 5 from 0, giving you -5. Then it is saying that you are subtracting 2 from that, giving you -7.

B.) is wrong, because they are adding the answer of the correct equation with another number, which would equal -12.

C.) is incorrect, because when you are adding a positive with a negative, you are actually subtracting, not adding. When you are doing this, always keep the sign for the answer (negative or positive) with whatever the larger addend is. So in this letter's situation, the equation would look like this: -5 + 2 = -3.

D.) is incorrect because once again, they are taking the original correct answer and subtracting it from another number, which would be -12.

I hope this helps.

5 0
3 years ago
Convert radians to degrees <br> Show all the work<br> 6. 3.8 radians<br> 8. 5π/4(this is a fraction)
e-lub [12.9K]

Answer:

Below in bold.

Step-by-step explanation:

Degrees = radians * 180/π.

6. 3.8 radians = 3.8 * 180 / π

    = 217.7 degrees to nearest hundredth.

8. 5π/4 radians = 5π/4 * 180/π

     =  5*180/4

     =  225 degrees.

8 0
3 years ago
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