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3 years ago

HELP PLEASE I have no clue what this is

Mathematics

2 answers:

devlian [24]3 years ago

7 0

Answer:

972

Step-by-step explanation:

Kamila [148]3 years ago

4 0

Answer:

Step-by-step explanation:

The volume (V) of a sphere is calculated using the formula

V = $\frac{4}{3}$ πr³ ← r is the radius

here r = 9, so

V = $\frac{4}{3}$ × π × 9³

= $\frac{4}{3}$ × π × 729

= $\frac{4(729)\pi }{3}$ = $\frac{2916\pi }{3}$ = 972 π m³

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Need some help with 2 (Geo)

MrRissso [65]

ans：A （60）
as it is opposite to 60degree and the theory of this is same with opposite number

8 0

3 years ago

13 subtracted from a number x

Nesterboy [21]

13-x = 13- x
theres is no answer for that x its a variable and 13 is a constant so is just 13-x

6 0

3 years ago

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I need help plzz

sesenic [268]

Answer:

3200

Step-by-step explanation:

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3 years ago

Given that −4i is a zero, factor the following polynomial function completely. Use the Conjugate Roots Theorem, if applicable. f

GalinKa [24]

Answer:

$\large \boxed{\sf \bf \ \ f(x)=(x-4i)(x+4i)(x+3)(x-5) \ \ }$

Step-by-step explanation:

Hello, the Conjugate Roots Theorem states that if a complex number is a zero of real polynomial its conjugate is a zero too. It means that (x-4i)(x+4i) are factors of f(x).

$\text{Meaning that } (x-4i)(x+4i) =x^2-(4i)^2=x^2+16 \text{ is a factor of f(x).}$

The coefficient of the leading term is 1 and the constant term is -240 = 16 * (-15), so we a re looking for a real number such that.

$f(x)=x^4-2x^3+x^2-32x-240\\\\ =(x^2+16)(x^2+ax-15)\\\\ =x^4+ax^3-15x^2+16x^2+16ax-240$

We identify the coefficients for the like terms, it comes

a = -2 and 16a = -32 (which is equivalent). So, we can write in $\mathbb{R}$ .

$\\f(x)=(x^2+16)(x^2-2x-15)$

The sum of the zeroes is 2=5-3 and their product is -15=-3*5, so we can factorise by (x-5)(x+3), which gives.

$f(x)=(x^2+16)(x^2-2x-15)\\\\=(x^2+16)(x^2+3x-5x-15)\\\\=(x^2+16)(x(x+3)-5(x+3))\\\\=\boxed{(x^2+16)(x+3)(x-5)}$

And we can write in $\mathbb{C}$

$f(x)=\boxed{(x-4i)(x+4i)(x+3)(x-5)}$

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

7 0

3 years ago

Help me, I’ll give you brainliest. :)

lions [1.4K]

Answer:

72, give me brainliest please

6 0

2 years ago

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