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3 years ago

Which expession is equal to 2 −28 − − − − √ 2−28 ? 4 7i − − √ 47i 4i 7 √ 4i7 −4 7 √ −47 −4i 7 √

2 answers:

7 0

Do problems 1-4, 11, 12 from appendix G in the book (page A47). ... Solution. 8 − 4i. (2.) (4 − 1. 2i) − (9 + 5. 2 i). Solution. −5 − 3i. (3.) (2 + 5i)(4 − i) ... Solution. 1, i, −1, and −i. 4. Write the product (. √3. 2. + 1. 2 i)(1. 2. +. √3. 2 ... (7.) 1+4i. 3+2i. Solution. 1+4i. 3+2i. = 1+4i. 3+2i · 3−2i. 3−2i. = 3−2i+12i−8i2 ..... i)8 = 28e8· 5π. 6.

bogdanovich [222]3 years ago

7 0

Just did the quiz, the answer is 4i√7

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Tamara is creating a model of a rectangle. She has 26 inches of yellow ribbon to use for the border of the rectangle. She wants

anzhelika [568]

Let

L-------> the length of the rectangle

W------> the width of the rectangle

we know that

the perimeter of the rectangle is equal to

$P=2L+2W$

$P=26\ in$ -----> because Tamara's using the whole ribbon

$26=2L+2W$ -------> equation A

$L=W+3$ -------> equation B

Substitute equation B in equation A

$26=2(W+3)+2W$

$26=2W+6+2W$

$4W=26-6$

$W=5\ in$

find the value of L

$L=W+3=5+3=8\ in$

therefore

the answer is

The system of equations is

$26=2L+2W$

$L=W+3$

7 0

3 years ago

Read 2 more answers

The solution for x2 + 2x + 8 ≤ 0 is

Gre4nikov [31]

Answer:

Step-by-step explanation:

Please use " ^ " for exponentiation: x^2 + 2x + 8 ≤ 0.

Let's solve this by completing the square:

x^2 + 2x + 8 ≤ 0 => x^2 + 2x + 1^2 - 1^2 + 8 ≤ 0. Continuing this rewrite:

(x + 1)^2 + 7 ≤ 0

Taking the sqrt of both sides: (x + 1)^2 = i*sqrt(7)

Then the solutions are x = -1 + i√7 and x = -1 - i√7

There's something really wrong here. I've graphed your function, x^2 + 2x + 8, and can see from the graph that there are no real roots, but only complex roots. Please double-check to ensure that you've copied down this problem correctly.

6 0

3 years ago

Read 2 more answers

The average American generates 4.4 lbs of trash every day. We circulated fliers that listed tips on how to reduce wastefulness i

Hatshy [7]

Answer:

$z= \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$