Mathematics: Which of the following is not a zero of the function shown below? a. -2 b. 2 c. 4 d. -4

Which of the following is not a zero of the function

Ответ:

coopera1744

07.01.2022

Mathematics

Step-by-step explanation:

For a number to be a zero of the polynomial, the function has to be equal to 0 if we were to plug in the number into x.

Let's find each:

plugging in x = -2 into the function:

$2(-2)^4-(-2)^3-42(-2)^2+16(-2)+160\\=0$

so this is a zero.

Plugging in x = 2 into the function:

$2(2)^4-(2)^3-42(2)^2+16(2)+160\\=48$

This is NOT a zero

Plugging in x = 4 into the function:

$2(4)^4-(4)^3-42(4)^2+16(4)+160\\=0$

this is a zero

Plugging in x = -4 into the function:

$2(-4)^4-(-4)^3-42(-4)^2+16(-4)+160\\=0$

this is a zero

hence, x = 2 in NOT a zero, answer choice B is right

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Ответ:

paolaviviana

31.01.2022

Mathematics

Probability ≈ 0.0714

Step-by-step explanation:

Consider permutation and combination;

$Total Combinations - 8C4,\\8C4 = 8! / 4! * ( 8 - 4 )!,\\8 * 7 * 6 * 5 / 4!,\\\\Total Combinations = 70,\\\\Combinations of Dance Classes - 5C4,\\5C4 = 5! / 4! * ( 5 - 4 )!,\\5 * 4 * 3 * 2 * 1 / 4 * 3 * 2 * 1,\\\\Dance Classes = 5,\\\\Probability - 5 / 70 = 0.0714,\\Conclusion; Probability = ( About ) 0.0714$

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Which of the following is not a zero of the function shown below?

a. -2
b. 2
c. 4
d. -4

Ответ:

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