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3 years ago

10

En total sloane compró 20 gomas de borrar y bolígrafos bolígrafo cuesta $2 y cada goma de borrar cuesta $0.50. Sí gastó $32.50.¿

Cuántas gomas de borrar compró?

1 answer:

expeople1 [14]3 years ago

8 0

Answer:

21 gomas de borrar y 11 gomas de borrar

Step-by-step explanation:

21 x .05 = $10.50

11 x 2.00 = $22.00

10.50 + 22.00 = $32.50

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valentina_108 [34]

Answer:

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Step-by-step explanation:

Alright, let's say the first digit of the number is x and the second digit is y, making the number xy, then we are told that:

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On top of this, we are also told that reversing the digits (xy becomes yx) decreases the original number (xy) by 36. Writing this into an equation:

yx = xy - 36

From the first equation, we find the following possibilities for number combinations:

[0,8] , [1,7] , [2,6] , [3,5] , [4,4] , [5,3] , [6,2] , [7,1] , [8,0]

Then, from the second equation we know that xy needs to be bigger than yx, since it decreases if you switch the numbers. This leaves out the first 5 possible combinations. Checking the others we find that:

[5,3] : 35 ≠ 53 - 36

[6,2] : 26 = 62 - 36 ←

[7,1] : 17 ≠ 71 - 36

[8,0] : 08 ≠ 80 - 36

There you go, the number has been found.

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2 years ago

I need help with this math problem please

goblinko [34]

<em>Answer,</em>

<em><u>4a^3 − 10a + 6/3a^2</u></em>

<em>Explanation,</em>

<em><u>Just Simplify</u></em>

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3 years ago

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bogdanovich [222]

Answer:

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Step-by-step explanation:

Subtract 22 from 47.

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Step-by-step explanation:

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