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lubasha [3.4K]
2 years ago
9

What is the x-coordinate of the vertex of the parabola whose equation is y = 3x² + 9x?

Mathematics
1 answer:
Aleksandr-060686 [28]2 years ago
5 0

Answer: x=-1,5.

Step-by-step explanation:

y=3x^2+9x\\\boxed {x=-\frac{b}{2a} }\\a=3,\ \ \ \ \ b=9.\\x=-\frac{9}{2*3}=-\frac{3}{2}=-1,5.

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Michael has interviewed for two jobs. He feels that he has a 50% chance of getting an offer on Job A and a 60% chance of getting
shutvik [7]

Using Venn probabilities, it is found that the probability that he receives an offer on at least one of the jobs is given by:

D. 0.80

<h3>What is a Venn probability?</h3>

In a Venn probability, two non-independent events are related with each other, as are their probabilities.

The "or probability" is given by:

P(A \cup B) = P(A) + P(B) - P(A \cap B)

In this problem, we have that:

  • 50% chance of getting an offer on Job A, hence P(A) = 0.5.
  • 60% chance of getting an offer on Job B, hence P(B) = 0.6.
  • 30% chance of getting an offer on both jobs, hence P(A \cap B) = 0.3.

Then, the probability of getting an offer on at least one job is:

P(A \cup B) = P(A) + P(B) - P(A \cap B) = 0.5 + 0.6 - 0.3 = 0.8

Hence option D is correct.

More can be learned about Venn probabilities at brainly.com/question/25698611

5 0
2 years ago
Pls help me this is a huge packet
Darina [25.2K]

Is there only choices A and B?

From the choices I can see you don’t even have to do any work. The equation starts with (y =). This indicates you will be working with the y intercept. The y intercept is simply where the line crosses on the y axis. In this graph, the y intercept is 2.5. Out of your choices (A and B that I can see) only one contains + 2.5.

B is your answer UNLESS there are choices c and d that are cut out.

4 0
3 years ago
Plot each pair of points in the Cartesian plane and solve for the distance between them. Write your answer on a separate one who
sammy [17]

Answer:

hame naghi ahta

Step-by-step explanation:

8 0
3 years ago
I need help quick!! its due in 10 mintunes helpp!!!!!
irina1246 [14]

Answer:

b) 10

Step-by-step explanation:

(3×10+46)+14 = 90

<em>Hope this helps!!!!!</em>

8 0
2 years ago
Read 2 more answers
Solve for<br> х<br> in the equation X^2-12x+36=90
bekas [8.4K]

Answer:

A, the first option

Step-by-step explanation:

4 0
3 years ago
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