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alexandr402 [8]
3 years ago
6

I'm not entirely sure what to do with this

Mathematics
1 answer:
GREYUIT [131]3 years ago
5 0

Answer:

80

Step-by-step explanation:

It's supplementary to angle DAC.

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(-3 - 5i )(-3 + 5i ) = -16 34 34 - 30
Virty [35]

You can use:

(a-b)(a+b)=a^2-b^2

We know:

i=\sqrt{-1}\to i^2=-1

Calculate:

(-3-5i)(-3+5i)=(-3)^2-(5i)^2=9-25i^2=9-25(-1)=9+25=34

6 0
3 years ago
I need the answers to all 4 asap please!! they shouldn’t be too hard
TiliK225 [7]

<em>parallelogram</em>

1. perimeter 10(2)+10(2)=32+20

   perimeter = 52cm

   area=b times h

  area = 16(9)=144cm2

   

2 <em>TRAPEZOID</em>

<em>   </em>perimeter =( 21+24+25+44.67)m

                      =114.67m

                     area= 1/2( b1+b2)h

                                1/2(44.67+25)20

                                696.7m2

3. perimeter = 2+3+12+2+3+5+3+2+9+7+3

                      =51<u>cm</u>

area = 54+6+6+6=72cm2<u> </u>      

4.    perimeter is  10+4+2+3+ 2+4+10+23 =    <u>58cm</u>

<u>area is </u>

(11+23).8=37.8

=272

trap-rect=136-6

<em>=130ft2</em>

3 0
3 years ago
If P = (-3,5), find the image
Serjik [45]

Answer:

the image of P is (-5,-3)

Step-by-step explanation:

formula for 90° counterclockwise is (-y,x)

therefore y will turn negative and x will remain the same

4 0
3 years ago
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The fourth graders collected 1.25 pounds more aluminum cans then the fifth graders collected. Select the values that could repre
Dahasolnce [82]
I am 100% sure is letter B)

6 0
3 years ago
Help!?! Please 3 3/4 - 7/8= what!!
butalik [34]

Answer:

2 7/8

Step-by-step explanation:

3 0
3 years ago
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