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Georgia [21]
3 years ago
6

Simplify the expression to a + bi form: (-11 - 7i) (2 +6i)

Mathematics
2 answers:
tester [92]3 years ago
5 0

( - 11 - 7i)(2 + 6i) \\  =  - 22 - 66i - 14i - 42 {i}^{2}  \\  =  - 22 - 80i + 42 \\  = 20 - 80i

I hope I helped you^_^

Rainbow [258]3 years ago
4 0

Answer:

20-80i

Step-by-step explanation:

(-11-7i)(2+6i)

-22-14i-66i-42i^2 where i^2=-1

-22-14i-66i-42(-1)

-22-14i-66i+42

-22+42-14i-66i

20-14i-66i

20-80i

Please mark me as Brainliest if you are satisfied with the answer.

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(-3x+4)+(8x-5)
VikaD [51]

Answer:

answer is 5x-1

its A

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4 0
3 years ago
Read 2 more answers
Graph each line using intercepts 1/4 x + 2y =2
Leno4ka [110]

The given equation is,

\frac{1}{4}x+2y=2

It can be rewritten in the form of y=mx+c, where c is the y intercept.

Hence,

\begin{gathered} 2y=-\frac{1}{4}x+2 \\ y=\frac{-1}{4\times2}x+\frac{2}{2} \\ y=\frac{-1}{8}x+1 \end{gathered}

Put different values for x and find value of y.

When x=0, y=1.

When x=1,

y=\frac{-1}{8}+1=\frac{7}{8}

The graph is,

5 0
1 year ago
Please HElPPP I AM LITERALLY STUCK
Morgarella [4.7K]
Please see attached photo and give brainliest if you can :) it took me a looong time, hope it helped :)

7 0
3 years ago
I- Please someone help me -_- I hate math so much
zzz [600]

Answer:

5 & 13

Step-by-step explanation:

a. -9 + 4 = -5

Absolute Value = 5

b. Absolute value of -9 is 9

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<em>hope this helps :)</em>

6 0
3 years ago
Read 2 more answers
HELPP PLEASE
umka21 [38]

Answer:

27.5 mm

Step-by-step explanation:

The game piece has the shape of two identical square pyramids attached at their bases. Given that the perimeters of the square bases are 80 millimeters, and the slant height of each pyramid is 17 millimeters.

Let the side length of each of the side of the base of the pyramid be b, hence:

perimeter = 4b

80 = 4b

b = 20 mm. half of the side length = b/2 = 20 / 2 = 10 mm

The slant height (l) = 17 mm, Let h be the height of one of the pyramid, hence, using Pythagoras theorem:

(b/2)² + h² = l²

17² = 10² + h²

h² = 17² - 10² = 189

h = √189

h = 13.75 mm

The length of the game piece = 2 * h = 2 * 13.75 = 27.5 mm.

6 0
3 years ago
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