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4 years ago

According to the Square Root property of Equations, the solution set of x2 = 25 is {±5}.

1 answer:

7 0

Justify "x2 = 25 is {±5}"

First, please write x^2, not x2.

x^2 = 25; solve for x. Take the sqrt of both sides. Must write "plus or minus " in front of the sqrt of 25:

x^2 = 25 becomes x = plus or minus 5, so x: {-5, 5}

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You must be under 12 years of age to order from the kid's menu at a restaurant. Which inequality represents the situation? Let a

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A, seeing how the sign indicates that a, your age, is less than 12

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3 years ago

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A machine has four components, A, B, C, and D, set up in such a manner that all four parts must work for the machine to work pro

olchik [2.2K]

Answer:

0.756

Step-by-step explanation:

It is given that a machine has four components, A, B, C, and D.

$P(A)=P(B)=0.93, P(C)=0.95,P(D)=0.92$

If these components set up in such a manner that all four parts must work for the machine to work properly.

We need to find the probability that the machine works properly. It means we have to find the value of $P(A\cap B\cap C\cap D)$ .

If two events X and Y are independent, then

$P(X\cap Y)=P(X)\times P(Y)$

Assume the probability of one part working does not depend on the functionality of any of the other parts.

$P(A\cap B\cap C\cap D)=P(A)\times P(B)\times P(C)\times P(D)$

Substitute the given values.

$P(A\cap B\cap C\cap D)=0.93\times 0.93\times 0.95\times 0.92$

$P(A\cap B\cap C\cap D)=0.7559226$

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Therefore, the probability that the machine works properly is 0.756.

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3 years ago

Sin(5x+20)

WINSTONCH [101]

Answer:

Yes.

Step-by-step explanation:

Just like normal algebra, you factor our the common factor, in this case, 5.

Thus,

$\sin(5(x + 4))$

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4 years ago

What is the value of a?

AlekseyPX

Answer:

Sorry can't help try asking someone else

Step-by-step explanation:

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3 years ago

During the great recession that began in January 2008, average weekly claims for unemployment were 420,000. The normal weekly av

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Average weekly claims for unemployment were 420,000.

The normal weekly average during full employment is 122,000.

To find how many more people we subtract normal weekly average during full employment from average weekly for unemployment

Number of people = 420,000 - 122,000 = 298,000

This is the number of people in a week. Hence, in order to find the number of people in the January month, we have to divide this number by 7 and then multiply by 31.

Because when we divide it by 7, it will give the number of people in 1 day and when multiplied by 31, it will give the number of people in the January month.

Thus, number of more people were filing for unemployment in January 2008 is given by

$\frac{ 298,000}{7}\cdot 31\\ \\ =1319714$

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4 years ago

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