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PolarNik [594]
3 years ago
7

Find the value of X in the simplest radical form

Mathematics
1 answer:
Galina-37 [17]3 years ago
4 0

Answer:. 7


Step-by-step explanation:


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Solve the system for the value of x and y
horrorfan [7]

What is the system that you have to solve to find the value of x and y?

3 0
3 years ago
The grocery store is located at a point on a coordinate plane with the same y-coordinate as the bank but with the opposite x-coo
Alexxandr [17]
Across the y axis. This question becomes easier if you graph it out in your head. Let's say the bank is at (2,2). Because the grocery store has an opposite x coordinate, the bank would be at (-2,2). If you look at this in your head, they are not even on different sides of the x axis, and therefore must be reflected across the y axis.
4 0
3 years ago
Read 2 more answers
You are given the information that P(A) = 0.30 and P(B) = 0.40.
Ad libitum [116K]

Answer:

1.B. No. You need to know the value of P(A and B). 2.C. Yes P(A and B) =0, so P(A or B) = P(A) + P(B).

Step-by-step explanation:

We can solve this question considering the following:

For two mutually exclusive events:

\\ A_{1}\;and\;A_{2}

\\ P(A_{1} or A_{2}) = P(A_{1}) + P(A_{2}) (1)

An extension of the former expression is:

\\ P(A_{1} or A_{2}) = P(A_{1}) + P(A_{2}) - P(A_{1} and A_{2}) (2)

In <em>mutually exclusive events,</em> P(A and B) = 0, that is, the events are <em>independent </em>one of the other, and we know the probability that <em>both events happen</em> <em>at the same time is zero</em> (P(A <em>and</em> B) = 0). There are some other cases in which if event A happens, event B too, so they are not mutually exclusive because P(A <em>and</em> B) is some number different from zero. Notice the difference between <em>OR</em> and <em>AND. The latter implies that both events happen at the same time.</em>

In other words, notice that the formula (2) provides an extension of formula (1) for those events that are not <em>mutually exclusive</em>, that is, there are some cases in which the events share the same probabilities in a way that these probabilities <em>must be subtracted</em> from the total, so those probabilities in common do not "inflate" the actual probability.

For instance, imagine a person going to a gas station and ask for checking both a tire and lube oil of his/her car. The probability for checking a tire is P(A)=0.16, for checking lube oil is P(B)=0.30, and for both P(A and B) = 0.07.

The number 0.07 represents the probability that <em>both events occur at the same time</em>, so the probability that this person ask for checking a tire or the lube oil of his/her car is:

P(A or B) = 0.16 + 0.30 - 0.07 = 0.39.

That is why we cannot simply add some given probabilities <em>without acknowledging if the events are or not mutually exclusive</em>, whereas we can certainly add the probabilities in question when we know that both probabilities are <em>mutually exclusive</em> since P(A and B) = 0.

In conclusion, knowing the events are mutually exclusive <em>does</em> provide <em>extra information</em> and we can proceed to simply add the probabilities of either event; thus, the answers are those in which <em>we need to previously know the value of P(A and B)</em>.  

7 0
3 years ago
Can someone please help me with this
gizmo_the_mogwai [7]

Answer:

3. How many faces do each of the following have?

  • cube - 6 faces
  • square pyramid - 5 faces
  • triangular pyramid - 4 faces
  • pentagonal pyramid - 6 faces

Hope this helps!

5 0
3 years ago
Solve the inequality and graph the solution <br> x +1 2/5 _&lt; 6 8/10
mixer [17]

Answer: x < 5 \frac{2}{5}

Step-by-step explanation:

x + 1 \frac{2}{5} < 6 \frac{8}{10}

x + 1 \frac{2}{5} < 6 \frac{4}{5}

x < 5 \frac{2}{5}

graph is attached

6 0
1 year ago
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