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2 years ago

2(x-3)+5>39 Please explain how to get it!

Mathematics

2 answers:

ollegr [7]2 years ago

8 0

Answer: x > 20

Step-by-step explanation:

first, i removed the parentheses.

2x - 6 + 5 > 39

then i calculated it.

2x - 1 > 39

then, i moved the constant to the right.

2x > 39 + 1

then, i added the two.

2x > 40

finally, i divided both sides.

solution: x > 20

almond37 [142]2 years ago

7 0

Answer:

x > 20

Step-by-step explanation:

You would firstly remove the parentheses, (2x - 6 + 5 > 39)

Then calculate to get 2x - 1 > 39

Move the constant to the right, and you'd get 2x > 39 + 1

Add 2 for 2x > 40

Then you'd divide both sides for x > 20

Sorry for the late response, took me a while.

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And that represent the probability that they take longer than 7 minutes to solve the puzzles.

Step-by-step explanation:

The complement rule is a theorem that provides a connection between the probability of an event and the probability of the complement of the event. Lat A the event of interest and A' the complement. The rule is defined by: $P(A)+P(A') =1$

On this case we have that n= 56 represent the employees selected to solve the puzzles.

We know that 23 out of the 56 selected solved the puzzles in less than 7 minutes.

Let's define the events A and A' like this:

A: Employees solved puzzles in less than 7 minutes

By the complement rule then:

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Based on this we are interested to find the probability for A'

We can begin finding P(A), from the definition of probability we know:

$P(A)=\frac{Possible outcomes}{Total outcomes}$

For this case if we replace we got:

$P(A) =\frac{23}{56}=0.411$

And using the complemnt rule we got:

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$P(A')=1-0.411=0.589$

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