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masya89 [10]
3 years ago
5

When a number is doubled and then taken away from 10, the result is negative 18, what is the number

Mathematics
1 answer:
geniusboy [140]3 years ago
5 0

Answer:

The number is 14.

Step-by-step explanation:

Assuming that x is the number that we are looking for, then it is first doubled "2x", if it's taken away from 10 we have "10 - 2x" and this is equal to -18. Therefore we have the expression:

10 - 2x = -18

-2x = -18 -10

-2x = -28

x = -28/-2

x = 14

The number is 14.

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Answer:

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Step-by-step explanation:

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Your teacher gives you a number cube with numbers 1-6 on its faces. You are asked to state a theoretical probability model for r
butalik [34]

The missing part of the question is show in bold format.

Your teacher gives you a number cube with numbers 1-6 on its faces. You are asked to state a theoretical probability model for rolling it

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Exercises 1–2

1. If the equality model was correct, about how many of each outcome

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Answer:

Step-by-step explanation:

1.

If the equally likely model was correct,  about how many of each outcome

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The probability of rolling any of the numbers from 1 to 6 is  p(1/6)

The number of each of the outcomes expected to be seen in 500 rolls of the number cube is np

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2.  From the given data in the roll;

The odd numbers 1, 3 and 5, were obtained at  77, 75 and 76 times respectively.

Thus, the total number of times odd number were rolled = 77 + 75 + 76 = 228

Probability of an odd number turning up = \frac{ number \ of  \ required  \ outcome}{ total \  number  \ of  \ possible \ outcome}

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= 0.456

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The total number of times even number were rolled = 92 + 90 + 90 = 272

Probability of an even number turning up  = \frac{ number \ of  \ required  \ outcome}{ total \  number  \ of  \ possible \ outcome}

= \frac{272}{500}

= 0.544

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