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lord [1]
3 years ago
6

If you double my number, then add 2, divide by 20 and add -1, the result is 0. What's my number?

Mathematics
2 answers:
Ulleksa [173]3 years ago
5 0

Answer:

9

Step-by-step explanation:

9 doubled is 18.

18 plus 2 is 20.

20 divided by 20 is 1.

1 plus -1 is 0.

Novay_Z [31]3 years ago
3 0

Answer:

77,464.4

Step-by-step explanation:

its right

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Answer

Let x be the number of tickets sold to adults and y the number sold to students:

x + y = 315. But we know that y was double x, then :

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Plug the value of y (in the 1st equation) by 2x:

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3x = 315

and x = 105 (which is the number of tickets sold to adults

7 0
3 years ago
Bernice sells 135 seashells by the seashore every day. She sells each sea shell for 3 dollars. For how many days does Bernice ne
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Answer:

Bernice would need 6 days assuming that everything remains constant to make $2430.

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Assuming she sells every single seashell every day.

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Bernice makes $405 each day.

Now, to solve for the amount of days, divide the total amount she wants to make ($2430) with the amount she makes per day ($405):

2430/405 = 6

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~

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Step-by-step explanation:

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