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katrin [286]
3 years ago
11

Consider the function f(x) =x^2+x a. Find f(-x).

Mathematics
1 answer:
spayn [35]3 years ago
4 0
Lo siento, solo necesito puntos
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A debate team of 4 members for a high school will be chosen randomly from a potential group of 15 students. Ten of the 15 studen
iragen [17]

Answer:

A) 0.1538

Step-by-step explanation:

4 members are going to be chosen:

M1 - M2 - M3 - M4

We have to find the probability that for each member, one without experience is chosen. There is no replacents.

Initially, we have 15 students, of which 10 have none experience. So the probability that M1 is chosen as a student with no experience is \frac{10}{15}.

Then, there are 14 students, of which 9 have no experience. So the probability that M2 is chosen as a student with no experience is \frac{9}{14}.

For the third member, there are 13 students, of which 8 have no experience. So the probability that M3 is chosen as a student with no experience is \frac{8}{13}.

For the last member, there are 12 students, of which 7 have no experience. So the probability that M4 is chosen as a student with no experience is \frac{7}{12}.

What is the probability that none of the members chosen for the team have any competition experience?

This is

P = \frac{10}{15}*\frac{9}{14}*\frac{8}{13}*\frac{7}{12} = 0.1538

The correct answer is:

A) 0.1538

7 0
3 years ago
Simplify 3ab + 4ab + 5
Anettt [7]
<span>Simplify 3ab + 4ab + 5
= 7ab + 5 (combine like terms)

hope it helps</span>
5 0
3 years ago
Read 2 more answers
What adds ups to 5 but multiplies to give you 12
qaws [65]
X + y = 5
    xy = 12

x + y = 5
      y = -x + 5

                xy = 12
      x(-x + 5) = 12
  x(-x) + x(5) = 12
       -x² + 5x = 12
             - 12   - 12
-x² + 5x - 12 = 0
 x² - 5x + 12 = 0
x = 5 ± √25 - 48
                2
x = -5 ± √-23
           2
x = -5 ± 4.79i
            2
x = -5 + 4.79i    or    x = -5 - 4.79i
            2                              2
x = -2.5 + 2.395i   or    x = -2.5 - 2.395i
y = -2.5 - 2.395i   or    y = -2.5 + 2.395i

The two numbers that add up to 5 and multiply to 12 is -2.5 ± 2.395i, which is -2.5 + 2.395i and -2.5 - 2.395i.
6 0
3 years ago
Mike paid $18.00 before taxes for 5 photo albums. His sister wants to buy two of the same type of album. What amount should she
Natalija [7]
She should expect to pay $7.20 
4 0
3 years ago
Read 2 more answers
Which of the equations below could be the equation of this parabola
SOVA2 [1]

Answer:

Step-by-step explanation:

Given is a graph of a parabola.

We have to find the equation of the paabola.

We observe from the graph the following points.

i) Vertex is (0,0)

ii) Open downward

iii) Axis of symmetry is y axis or x=0

iv) It passes through (1,4)

The parabola will be of the form

x^2 =-4ay

Substitute x=1 and y =4, to find a

1 = -4a(4)

a =\frac{-1}{16}

Hence equation would be

x^2 =-\frac{1}{4} y

3 0
3 years ago
Read 2 more answers
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