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Makovka662 [10]

3 years ago

9

someone please help

1 answer:

Savatey [412]3 years ago

4 0

Check the picture below.

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What is (1-i)^3 <br> Please explain how you got that

My name is Ann [436]

$\bf (1-i)^3\implies ~\hfill \begin{array}{cccccccl} 1^3&+&3(1)^2(-i)^1&+&3(1)^1(i)^2&+&(-i)^3\\\\ 1&+&(-3i)&+&(3i^2)&+&(-i^3)\\\\ 1&-&3i&+&3i^2&-&i^3 \end{array} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{let's recall that}}{i^2=-1\qquad \qquad i^3=-i} \\\\[-0.35em] ~\dotfill\\\\ 1-3i+3(-1)-(-i)\implies 1-3i-3+i\implies -2-2i$

6 0

3 years ago

Solve the following system using the SUBSTITUTION method.<br> x - 3y = 2<br> 2x - 6y = 6

notka56 [123]

ANSWER:

x – 3y = 2 ...(1)
2x – 6y = 6 ...(2)

On solving eq(1), we get

x – 2 = 3y
x – 2/3 = y

Plug the value of x in eq(2)

2x – 6(x - 2/3) = 6
2x – 2(x – 2) = 6
2x – 2x + 4 = 6
0 = 6 – 4
0 ≠ 2

So, given system of equations is not correct.

6 0

2 years ago

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Find the value of x, and please explain how you got x

katen-ka-za [31]

X equals to 48

The work is shown in the picture. I hope this helps.

8 0

2 years ago

WILL GIVE BRAINLIEST!<br> Find x given y = 76° in the figure below.<br> x = <br> °

4vir4ik [10]

Answer:

104°

Step-by-step explanation:

The straight line for $q$ forms an angle of 180°

Therefore,

$x+y=180$

$x+76=180$

$x=180-76$

$x=104$

7 0

2 years ago

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HELP PLEASE! ALSO CAN U EXPLAIN BECAUSE I NEED TO LEARN AAA m ÷ -1/4 = 6

Sveta_85 [38]

The answer is -3/2 lmk if you need an explanation :)

8 0

2 years ago