All categories

3 years ago

If it takes 4 men 6hours to repair a road, how long will it take 7 men to do the job if they work at the same rate.

1 answer:

Crank3 years ago

4 0

Tricky question. This isn't a ratio question even though it seems like one.

First divide 7 by 4.
$7 \div 4 = 1.75$

With more men, the hours taken to repair a road will be even shorter.

So next divide 6 by 1.75.
$6 \div 1.75 = 3.43$

Answer : It'll take 3.43 hours to do the job if they work at the same rate.

Hope this helps. - M

You might be interested in

Whoever answers this correctly gets brainliest

ELEN [110]

Answer: 11. Is A

Step-by-step explanation:

5 0

3 years ago

Por favor me podrían ayudar y dar un ejemplo de cómo llevar a cabo

iogann1982 [59]

Answer:

Step-by-step explanation:

7 0

2 years ago

Five less than twice the value of a number is equal to three times the quantity of

MissTica

Answer:

These types of questions are not daunting if you break it down. First look at "Five less than twice the value of a number."

"Twice the value of a number" is simply 2x.

"Five less" is simply -5, so for the first part we have (2x-5)

Next, analyze the second part. "Three times the quantity of four more than one half the number."

Looking at "Three times the quantity" simply means "3 times something".

"the quantity of four more than one half the number" is 4 + "one half the number" or 4 + (1/2)x.

So the second part is simply 3(4+x/2).

Finally we finish the entire equation, (2x-5) = 3(4+x/2) then solve for x.

2x-5 = 12 + (3/2)x

2x-(3/2)x = 17

x/2 = 17

x=34

Checking the left side, (2x-5) = 2(34) - 5 = 63.

Checking the right side, 3(4+(34/2)) = 3(4+17) = 3(21) = 63.

6 0

3 years ago

Whats the answer to 1/5x=121 x=?

weqwewe [10]

You have an algebraic expression in which you are solving for x. When you are solving for a variable, you need to isolate it all alone. Since you are multiplying by 1/5, you will have to undo it by multiplying by its reciprocal. In this case you are multiplying both sides by 5/1.

5/1 *1/5x = 121*5/1
x = 605

To check your answer, plug this value in for x and multiply it by 1/5. You should arrive at 121! Good luck!

3 0

3 years ago

Weights of the vegetables in a field are normally distributed. From a sample Carl Cornfield determines the mean weight of a box

pantera1 [17]

To find the z-score for a weight of 196 oz., use

$z=\frac{x-\mu}{\sigma}=\frac{196-180}{8}=\frac{16}{8}=2$

A table for the cumulative distribution function for the normal distribution (see picture) gives the area 0.9772 BELOW the z-score z = 2. Carl is wondering about the percentage of boxes with weights ABOVE z = 2. The total area under the normal curve is 1, so subtract .9772 from 1.0000.

1.0000 - .9772 = 0.0228, so about 2.3% of the boxes will weigh more than 196 oz.

7 0

3 years ago