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3 years ago

Solve the equation for x

Mathematics

2 answers:

WARRIOR [948]3 years ago

6 0

Answer:

x = 5

Step-by-step explanation:

--- x - 9 = -7 add 9 both sides

--- x - 9 + 9 = -7 + 9

--- x = 2 multiply both sides by 5

5 * --- x = 2 * 5

2x = 10

x = 10 / 2

x = 5

Rasek [7]3 years ago

5 0

Answer:

the answer is 5

Step-by-step explanation:

2x/5 - 9 = -7

2x/5 = -7 + 9

2x/5 = 2

2x = 2 * 5

2x = 10

x = 10/2

x = 5

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The spinner that completes the question is added as an attachment

From the attached spinner, we have:

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2 years ago

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Answer:

Step-by-step explanation:

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3 years ago

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Each of the 25 balls in a certain box is either red, blue or white and has a number from 1 to 10 painted on it. If one ball is t

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Answer:

Not sufficient information

Step-by-step explanation:

Probability of white ball: P(W)

Probability of even number: P(E)

Probability of white ball or even number: P(W∨E) is asked

Considering case (1):

Probability of white ball and even number: P(W∧E) = 0

And we know that,

P(W∨E) = P(W) + P(E) - P(W∧E) = P(W) + P(E) - 0 = P(W) + P(E)

It is not sufficient to calculate the desired probability.

Considering case (2):

P(W) - P(E) = 0.2

Here, it is possible for P(W) and P(E) to get multiply values.

So P(W∨E) cannot be determined.

Considering cases (1) & (2):

P(W∧E) = 0 and P(W) - P(E) = 0.2

So, P(W∨E) = P(W) + P(E) = P(E) + 0.2 + P(E) = 2P(E) + 0.2

Again multiple answers are possible.

Such as, for P(E) = 0.4 (10 even balls) ⇒ P(W∨E) = 1

but for P(E) = 0.2 (5 even balls) ⇒ P(W∨E) = 0.6

So, the information are not sufficient.

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3 years ago