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4 years ago

Which choice is equivalent to the expression below √-81

Mathematics

1 answer:

garri49 [273]4 years ago

4 0

Answer:

Step-by-step explanation:

$\sqrt{-81}$ is the same as $\sqrt{81}$ · $\sqrt{-1}$

This can be simplified to 9 · $\sqrt{-1}$

And the square root of -1 is i,

so this equals 9i

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On a coordinate plane, a line goes through points (negative 1, 0), (0, 1), and (1, 2). Which table goes with the graph?

jok3333 [9.3K]

Answer:

Table B

Step-by-step explanation:

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3 years ago

An someone help please and thx:) !

olganol [36]

Answer:

x = 29

Step-by-step explanation:

All triangle angles add up to 180 so:

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3 years ago

"Solving Equations by Completing the Square: m^2+2m-48=-6

kvv77 [185]

$m^2+2m-48=-6 \\ \\ m^2+2m-48+6=0\\ \\m^2+2m-42=0\\ \\a=1, \ b= 2, \ c= -42 \\ \\\Delta = b^{2}-4ac = 2^{2}-4*1*(-42)= 4+168 =172 \\\\\sqrt{\Delta }=\sqrt{172} =\sqrt{4*43}=2\sqrt{43}\\ \\x_{1}=\frac{-b-\sqrt{\Delta }}{2a} =\frac{-2-2\sqrt{43}}{2}=\frac{2(-1-\sqrt{43})}{2}= -1-\sqrt{43} \\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a} = \frac{-2+2\sqrt{43}}{2}=\frac{ 2(-1+\sqrt{43})}{2}= -1+\sqrt{43}$

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3 years ago

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Find the volume of a cylinder with a radius of 8 cm in height 10 cm? To the nearest whole centimeter

BartSMP [9]

V=2010.62cm^3 hope this helped you.

4 0

3 years ago

Answers please, asap!!

ANEK [815]

Answer:

x2 = -0.600000

x3 = -0.521600

Step-by-step explanation:

Given the formula;

xn+1 = (xn)³-5/10

x2 = (x1)³-5/10

Given x1 = -1

x2 = (-1)³-5/10

x2 = (-1-5)/10

x2 = -6/10

x2 = -0.600000

x3 = (x3)³-5/10

Given x3 = -0.6

x3 = (-0.6)³-5/10

x3 = (-0.216-5)/10

x3 = -5.216/10

x3 = -0.521600

3 0

3 years ago

Which choice is equivalent to the expression below √-81​

Which choice is equivalent to the expression below √-81