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1 year ago

twice the sum of the number and negative seven is eight. Find the number. Round your answer to the nearest integer, if necessary

Mathematics

1 answer:

Ugo [173]1 year ago

3 0

The number that twice the sum of it and negative seven is eight is 11.

<h3>How to find the number ?</h3>

Twice the sum of the number and negative seven is eight. The number can be found as follows:

let

the number = x

According to the word expression, twice the value of the addition of x and minus seven is equals to 8. Hence, we will find the value of x in the equation formed from the words expression.

The variable x is the required number.

Therefore,

2(x + (-7)) = 8

2(x - 7) = 8

open the brackets

2(x - 7) = 8

2x - 14 = 8

add 14 to both sides of the equation

2x - 14 = 8

2x - 14 + 14 = 8 + 14

2x = 22

divide both sides by 2

x = 22 / 2

x = 11

learn more on numbers here: brainly.com/question/11234992

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Answer:

$\frac{7}{12}$

Step-by-step explanation:

Probability refers to chance of happening of some event.

Conditional probability is the probability of an event A, given that another event B has already occurred.

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In box $B_1$ :

No. of black balls = 1

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In box $B_2$ :

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Let B, W denote black and white marble.

So, probability that either of the boxes $B_1,B_2$ is chosen is $\frac{1}{2}$

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Probability that a black ball is chosen from box $B_2=\frac{2}{3}$

To find:probability that the marble is black

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3 years ago

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vlada-n [284]

Answer option A

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