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swat32
3 years ago
6

Someone help me on this.

Mathematics
1 answer:
Tems11 [23]3 years ago
7 0

Answer:

-57-39i

Step-by-step explanation:

So we have the expression:

(7+2i)(-9-3i)

FOIL:

=7(-9)+7(-3i)+2i(-9)+2i(-3i)

Simplify:

=-63-21i-18i-6i^2

Recall that i² is just -1. Thus:

=-63-21i-18i-6(-1)

Simplify:

=-63-21i-18i+6

Combine like terms:

=(-63+6)+(-21i-18i)

Add:

=-57-39i

And we're done!

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Identify the coefficients in the expression below.<br><br> -6x+5y+4x+9
Montano1993 [528]

Answer:

3 coefficients in this expression are: -2x, 5y and 9 (natural number)

Step-by-step explanation:

-6x + 5y + 4x + 9

= -6x + 4x + 5y + 9

= -2x + 5y + 9

3 coefficients in this expression are: -2x, 5y and 9 (natural number)

Hope this help you :3

5 0
3 years ago
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navik [9.2K]

Answer:

<h3>2</h3>

Step-by-step explanation:

\mathrm{Add\:the\:numbers:}\:1+1=2\\\\

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3 years ago
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Find the height of the building below by using your knowledge of trigonometry.
Lilit [14]

Answer:

50\sqrt{3}

Step-by-step explanation:

The figure represents a 30-60-90 special triangle

in this special right triangle the measure of sides lengths is represented by

a, a\sqrt{3}, and 2a

The side length that sees angle measure 30 is represented by a and here we see a = 50m

The height of the building, which sees angle measure 60, is equal to

50\sqrt{3}

5 0
3 years ago
The roof of Mr. Thompson’s house is blank feet high to climb on top of his house healing a 13 foot ladder against the roof of hi
Andrews [41]
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3 years ago
Pleaseeeeee solveee 25 points pleaze help geometry
tatiyna

Answer:

(-3/2, 6)

Step-by-step explanation:

(-3,8) (6,-4)

As we move along the line segment with endpoints (-3,8) and (6,-4) from  (-3,8) to (6,-4) x increases by 9 units (from -3 to 6) and y decreases by -12 units (from 8 to -4).

for ratio of 1:5

Since 1+5=6, the point we are looking for is 1/6 of the way from (-3,8) to (6,-4).  

So, the desired point is

(-3 + (1/6)(9), 8 - (1/6)(12) )

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= ( (-6 + 3)/2, 6)

= (-3/2, 6)

for map reference see the image below

8 0
3 years ago
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