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Setler [38]
3 years ago
13

The model represents a polynomial of the form ax2 + bx + c.

Mathematics
2 answers:
kipiarov [429]3 years ago
6 0

Answer:

For ed2020

Answer: (3x – 1) and (x + 4)

For me that was the (second option) but it could be different for you...

Step-by-step explanation:

daser333 [38]3 years ago
3 0

Answer:  The equation modeled is

3x2 – 4x + 1 = (3x – 1)(x – 1) . Much easier to understand with the symbols:

3x^{2} -4x +1 = (3x-1)(3x-1)

Step-by-step explanation:

    x   x  .x  -1  

x   x² x² x² -x

-1  -x -x- x  +1

That is how I interpreted the "tile" set up.

Now count up the factors:  

There are 3 x² .   There are 4 -x and  a  +1

That's the third answer choice.

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There are 14 juniors and 16 seniors in a chess club. a) From the 30 members, how many ways are there to arrange 5 members of the
Dmitrij [34]

Answer:

a) 17,100,720

b) 4,717,440

c) 10,920

d) 2821

Step-by-step explanation:

14 juniors and 16 seniors = 30 people

a) From the 30 members, how many ways are there to arrange 5 members of the club in a line?

As it is a ordered arrangement

30.29.28.27.26 = 17,100,720

b) How many ways are there to arrange 5 members of the club in a line if there must be a senior at the beginning of the line and at the end of the line?

16.28.27.26.15 = 4,717,440

c) If the club sends 2 juniors and 2 seniors to the tournament, how many possible groupings are there?

Not ordered arrangement. And means that we need to multiply the results.

C₁₄,₂ * C₁₆,₂

C₁₄,₂ = <u>14.13.12!</u> = <u>14.13 </u>= 91

           12! 2!            2    

C₁₆,₂ = <u>16.15.14!</u> = <u>16.15 </u>= 120

           14! 2!            2    

C₁₄,₂ * C₁₆,₂ = 91.120 = 10,920

d) If the club sends either 4 juniors or 4 seniors, how many possible groupings are there?

Or means that we need to sum the results.

C₁₄,₄ + C₁₆,₄

C₁₄,₄ = <u>14.13.12.11.10!</u> = <u>14.13.12.11 </u>= 1001

                  10! 4!               4.3.2.1    

C₁₆,₄ = <u>16.15.14.13.12!</u> = <u>16.15.14.13 </u>= 1820

                  12! 4!               4.3.2.1    

C₁₄,₄ + C₁₆,₄ = 1001 + 1820 = 2821

7 0
3 years ago
What is 4/9 divided by 5?
JulijaS [17]

Answer:

it is 4/45

Step-by-step explanation:

i wrote down and did the work on a piece of paper

3 0
3 years ago
Read 2 more answers
Based on a​ survey, assume that ​48% of consumers are comfortable having drones deliver their purchases. Suppose that we wan
Andru [333]

Answer:

The value of n is the size of the sample, the number of customers selected.

The value of p is 0.48.

The value of q is 0.52.

Step-by-step explanation:

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

48% of consumers are comfortable having drones deliver their purchases.

This means that p = 0.48, q = 1 - p = 1 - 0.48 = 0.52

The value of n is the size of the sample, the number of customers selected.

5 0
2 years ago
Two triangles in a triangle measure 65 degrees what is the measure of the third angle in the triangle
natulia [17]

Answer:

115 degrees is the third angle measure.

Step-by-step explanation:

All the angle measures of a triangle are supposed to add up to 180 degrees, so 180-65=115.

3 0
3 years ago
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