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3 years ago

A jar contains 15 navy and 26 violet marbles. A marble is drawn at random. What is the probability that the marble is violet?

Mathematics

2 answers:

Eva8 [605]3 years ago

8 0

Answer:

63%

Step-by-step explanation:

26 plus 15 is overall marbles and then divide 26 by 41 then move decimal over two

Sav [38]3 years ago

5 0

Answer:

63% (rounded)

Step-by-step explanation:

First, you need to know how many marbles there are in total.

15 + 26 = 41

There are 41 marbles in total.

Out of 41 marbles, there are 26 violets. So you would divide 26 by 41.

26/41 = 0.63414634146...

Then you would round your number to 0.63.

The next step is to then change it to a percentage.

0.63 x 100 = 63

63% is your answer.

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Two gears in a machine are aligned by a mark drawn from the center of one gear to the center of the other. If the first gear has

Aleksandr [31]

Answer:

Step-by-step explanation:

for the first gear

revolutions/teeth

1 / 24

2 / 48

3 / 72

4 / 96

5 / 120

6 / 144

for the second gear

revolutions/teeth

1 / 40

2 / 80

3 / 120

4 / 160

the two marks will meet after 120 teeth, 5 revolutions of the first gear and 3 revolutions of the second.

the way to get that amount of teeth is

$24 = 2 \times 2 \times 2 \times 3 = {2}^{3} \times 3$

$40 = 2 \times 2 \times 2 \times 5 = {2}^{3} \times 5$

the Least Common Multiple equals the product of all factors, but those factors who are repeted for both numbers should be only once.

${2}^{3} \times 5 \times 3 = 120$

120 teeth are 5 revolutions for gear1 and 3 por gear2

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Step-by-step explanation:

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Step-by-step explanation:

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Answer:

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