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Lilit [14]
3 years ago
10

(-3√ -81)(-5+√ -9)+9i

Mathematics
1 answer:
AnnyKZ [126]3 years ago
5 0

Answer:

144i + 81

Step-by-step explanation:

(-3*9i)(-5 + 3i) + 9i

-27i (-5 + 3i) + 9i

FOIL

135i + 81 + 9i

144i + 81

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If I’m correct, I think A. 0.3x2 is the correct answer.
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3 years ago
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Problem is in the pictures
marta [7]

Answer:

<h2>(-5, 3)</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}6x+3y=-21&\text{divide both sides by (-3)}\\2x+5y=5\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-2x-y=7\\2x+5y=5\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad4y=12\qquad\text{divide both sides by 4}\\.\qquad\qquad y=3\\\\\text{Put it to the second equation:}\\2x+5(3)=5\\2x+15=5\qquad\text{subtract 15 from both sides}\\2x=-10\qquad\text{divide both sides by 2}\\x=-5

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3 years ago
5. Two plumbing companies charge the rates shown in the table. Find
valkas [14]
$32.50
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4 0
3 years ago
Algebra II Part 1
Marysya12 [62]

Answer:

4y+x-3=0

Step-by-step explanation:

The equation is y=mx+b

1) Use the coordinates from the first point

(-1,1)

1= -m+b

2) Use the coordinates frm the second point

(-5,2) (y=mx+b, use x=-5, y=2)

2=-5m+b

You have the system of equations

1=-m+b (multiply by -1)  -1= m-b

2=-5m+b

Add the first equation (multiplied by -1) and the second one

-1+2= m-b-5m+b

1= -4m

m=-0.25

2=1.25+b

b=0.75

y=-0.25x+0.75

4y= -x+3

4y+x-3=0

5 0
3 years ago
When data consist of percentages, ratios, growth rates, or other rates of change, the geometric mean is a useful measure of cent
weqwewe [10]
mean=\sqrt[5]{1.093\cdot1.12\cdot1.145\cdot1.046\cdot1.057}=\sqrt[5]{1.5497096705104}\\\\ \approx 1.0916<span>

The geometric mean is 1.0916.</span>
5 0
3 years ago
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