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Zanzabum
3 years ago
9

Evaluate each expression if x=-2,y=-3and z=5. 2x+3y+z?

Mathematics
1 answer:
maw [93]3 years ago
7 0

Answer:

Step-by-step explanation:

Substitute the variable with the number

2(-2) + 3(-3) + 5

-4 - 9 + 5

-13 + 5 = -8

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hammer [34]
343 = 7*7*7, so the square root is 7*sqrt(7), because there is one 7 left in the square root after taking out the other 2.
Final answer:
7*sqrt(7), or about 18.52
Hope I helped :)
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What is the solution set of x2 + y2 = 26 and x − y = 6
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3 years ago
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The table shows the results of a survey of 200 randomly selected people about where they live and whether they hike regularly.
MissTica

Not regularly hiking and living near a lake are<u> Independent </u>events  because the probability of not regularly hiking given that a person

lives near a lake<u> is equal </u>to the probability of not regular hiking.

<h3>What is Probability ?</h3>

Probability is defined as the study of likeliness of an event to happen.

It has a range of 0 to 1 , where 0 means uncertain while 1 indicates certainty.

In the given question the table shows the results of a survey of 200 randomly selected people about where they live and whether they hike regularly.

Assuming A is the people who do not regulary hike

B are the people who live near a lake.

P(A given B ) = P(A and B)/P(B)

When two events are Independent.

if P( A given B) = P(A)

From the data given in the question , we can determine

P(A) = 100/200 = 0.5

P(B) = 48/200 = 0.24

P(A and B) = 24/200 = 0.12

P(A given B) = (24/200)/(48/200) = 24/48 = 0.5 = P(A)

As both the probabilities are equal , Therefore A and B are independent.

So now the statement can be completed as

Not regularly hiking and living near a lake are<u> Independent </u>events  because the probability of not regularly hiking given that a person

lives near a lake<u> is equal </u>to the probability of not regular hiking.

To know more about Probability

brainly.com/question/11234923

#SPJ1

6 0
2 years ago
The force F​ (in pounds) required to push a sofa across a floor varies directly as the weight w​ (in pounds) of the sofa.
djyliett [7]

Answer: F=0.41w


Step-by-step explanation:

1. You know that the force<em> F</em> varies directly as the weight <em>w</em> of the sofa. Then, you can write the following expression:

F=kw

Where <em>k </em>is the constant of proportionality.

2. You know that a person can push a 120​ pound sofa with a force of 50 pounds, then you can calcualte the constant of proportionality as following:

k=\frac{F}{w}=\frac{50lb}{120lb}=0.41

3. Then, the equation is:

F=0.41w

3 0
4 years ago
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