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saw5 [17]
2 years ago
7

a and b can do a piece of work in 12 days, b and c in 15 days and c and a in 20 days. how much time will a alone take to finish

the job
Mathematics
1 answer:
nydimaria [60]2 years ago
7 0
A and b can do a piece of work in 12 days. If a alone have to finish the job among b and c so

A and b=12
A (24 days alone without b)

So if b and c 15 days and c 20 days. If a have to do all I would add 24 and 15 and 20 which would be 59 days
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What are similarities between, rational and irrational numbers?
luda_lava [24]
Rational number are numbers which can be expressed in a ratio of two integers. Both numerator and denominator are whole numbers<span>, where the denominator is not equal to zero.</span>
An irrational number<span> on the other hand is a </span>number which cannot be expressed in a ratio of two integers. However there are similarities between them. For example: the product of both irrational numbers of born rational numbers can be rational number, both irrational and rational numbers can be negative and positive, and both can be expressed as a fraction. 
4 0
3 years ago
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6 and half minus seven-eighths divided by five and eleven-sixteenth=
kow [346]
The answer is 90/91. 6 1/2 - 7/8 divided by 5 11/16. Turn 6 1/2 and 5 11/16 to an improper fraction. 6 1/2= 13/2. 5/11= 91/16. Then you have to get each fraction to have equal denominators. All of them can have a denominator of 16. So you times everything to get a denominator of 16. 13/2= 104/16. 7/8=14/16. 91/16 stays the same because the denominator is already 16. Next you subtract 104/16 and 14/16 and get 45/8.( because you need to put it in simplest form.) Lastly you divide 45/8 by 91/16 and get 90/91.

5 0
2 years ago
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5(x+3)-7(6-3)+29=50-3(8-x)
Sveta_85 [38]

Answer:

\quad x=\frac{3}{2}

Step-by-step explanation:

7\left(6-3\right)=21, \mathrm{Expand\:}5\left(x+3\right)-21+29:\quad5x+23, \mathrm{Expand\:}50-3\left(8-x\right):\quad 3x+26, Subtract 23 and 3x from both sides and simplify: 2x=3, Divide both sides by 2 and simplify: x=\frac{3}{2}

<em>Hope this helps!!!</em>

6 0
3 years ago
A bag contains six red marbles three blue marbles and five green marble the three marbles are drawn out of the bag what is the p
tia_tia [17]

Answer:

Step-by-step explanation:

Red = 6

Blue = 3

Green = 5

Total = 14

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Second Marble = 5 * 13  which brings you down to 4 red and 12 total.

Third Marble = 4/12 = 1/3

Result

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P(3 Red) = 1/7 * 5/13

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P(3 Red) = 0.0549 . Rounding to the nearest 1/100 depends on what you have been told about rounding. I would say the answer is 0.05 but your teacher may say something different.

8 0
3 years ago
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