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garik1379 [7]
3 years ago
11

If 10 men can complete a piece of work in 30 days how many men are requiredto complete the same job in 25 days?

Mathematics
1 answer:
77julia77 [94]3 years ago
3 0
We must assume that all workmen work at the same rate, and keep it up forever.

More men ==> fewer days

so the proportion is:    30/25 = x/10

Cross-multiply the proportion:

300 = 25 x

Divide each side by 25 :

x = 300/25 = <u>12 men</u>
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Find the 100th term for the sequence. -9,-4, 1, 6, 11, .......
Paraphin [41]

Answer:

486

Step-by-step explanation:

for the 2nd term, add 5 to -9

for the 3rd, add 5 × 2 to -9

for the 4th, add 5 × 3 to -9

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for the 100th, add 5 × (100 - 1) to -9

=> 5 × 99 + (-9)

=> 486

8 0
2 years ago
I am thinking of a number. i will add four and then multiply it by five. the answer will be thirty five. whats the number?
kodGreya [7K]

Answer:

B. 3

Step-by-step explanation:

Let's make an equation for this. Our unknown number is x.

x

We are adding 4.

x + 4

Then multiplying by 5.

(x + 4) • 5

It will equal 35.

(x + 4) • 5 = 35

To solve this, divide both sides by 5.

(x + 4) = 7

Now subtract 4 from both sides.

x = 3

This is your answer.

Check this by plugging it back into our original equation.

(x + 4) • 5 = 35

(3 + 4) • 5 = 35

7 • 5 = 35

35 = 35

Your answer is correct.

Hope this helps!

3 0
2 years ago
How far from the line 3x+2y=5 is the point of intersection of x+y=5 and x–y=3?
Ray Of Light [21]

Answer:

(9sqrt13)/13

Step-by-step explanation:

7 0
3 years ago
What is the value of the function y=3x−1 when x=−1 ?<br><br> −8<br> −4<br> 2<br> 6
Paraphin [41]
Substitute x for -1 in <span> y=3x-1
</span>y = <span><span>(3) <span>(-1) -</span></span><span>1
</span></span>Solve
y = (3) (-1) -1
y = -3 - 1
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3 0
3 years ago
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Natasha2012 [34]

Answer:

2.40/10 = 0.24 per Oz

2.08/8 = 0.26 per Oz.

so yes, 10 Oz. for 2.40 is a better deal

Step-by-step explanation:

your are welcome

6 0
2 years ago
Read 2 more answers
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