3 years ago

What are the possible number of negative zeros of f(x) = -2x7 - 2x6 7x5 - 7x4 4x3 4x2 ?

Mathematics

1 answer:

storchak [24]3 years ago

8 0

Hello,

f(-x)=2x^7-2x^6-7x^5-7x^4-4x^3+4x^2 has 2 changing signes.

Maximum possible number of negative roots is 2

You might be interested in

From a group of 3 men and 4 women, a delegation of 2 is selected. What is the expected number of men in the delegation?

Ostrovityanka [42]

Answer:

The expected number of men in the delegation is 0.86.

Step-by-step explanation:

Number of men = 3

Number of women = 4

A delegation of 2 is selected.

Let X be the number of men selected. So, the possible values of X are 0,1,2.

$P(X=0)=\dfrac{^3C_0\times ^4C_2}{^7C_2}=\dfrac{2}{7}$

$P(X=1)=\dfrac{^3C_1\times ^4C_1}{^7C_2}=\dfrac{4}{7}$

$P(X=2)=\dfrac{^3C_2\times ^4C_0}{^7C_2}=\dfrac{1}{7}$

The expected number of men in the delegation is

$E(x)=0\times P(X=0)+1\times P(X=1)+2\times P(X=2)$

$E(x)=0\times \dfrac{2}{7}+1\times \dfrac{4}{7}+2\times \dfrac{1}{7}$

$E(x)=\dfrac{6}{7}$

$E(x)\approx 0.86$

Therefore, the expected number of men in the delegation is 0.86.

4 0

2 years ago

Wholesale price of coffeemaker = $31.55<br>Percentage markup = 17%<br>Retail price?

serious [3.7K]

Answer:

$36.9135

Step-by-step explanation:

Markup = 17% of 31.55

= 17/100 × 31.55

= 5.3635

Retail price = whole sale price + markup

= 31.55 + 5.3635

= $36.9135

8 0

2 years ago

3=4x+8y i need help

Daniel [21]

The answer would be if you were solving for y. Y= 1/2x+3/8

6 0

2 years ago

PLS ANSWER QUICK THIS IS DUE TODAY AND IVE BEEN REPOSTING THIS 5 TIMES ALREADY!! ILL GIVE YOU BRAINLIEST JUST PLEASEEEE

ivolga24 [154]

Answer:

9) y = 9/8x + 4, 10) y = 7/5x - 4

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

Denise is checking to determine if the expressions x + x + 6 and 4 + 3 x minus 2 are equivalent. When x = 4, she correctly found

miss Akunina [59]

Answer: hi

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers