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3 years ago

14

Please help answer number 4!

1 answer:

solong [7]3 years ago

4 0

The image is black, what’s the question?

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Simplify the expression to a+bi form

Wewaii [24]

$-\sqrt{100}-\sqrt{-192}+\sqrt4-\sqrt{-27}=(*)\\\\\sqrt{100}=10\ because\ 10^2=100\\\\\sqrt{-192}=\sqrt{-1}\cdot\sqrt{192}=i\sqrt{64\cdot3}=i\sqrt{64}\cdot\sqrt3=8i\sqrt3\\_{\sqrt{64}=8\ because\ 8^2=64,\ use\ \sqrt{-1}=i\ and\ \sqrt{ab}=\sqrt{a}\cdot\sqrt{b}}\\\\\sqrt4=2\ because\ 2^2=4\\\\\sqrt{-27}=\sqrt{-1}\cdot\sqrt{27}=i\sqrt{9\cdot3}=i\sqrt9\cdot\sqrt3=3i\sqrt3\\_{\sqrt9=3\ because\ 3^2=9}\\\\(*)=-10-8i\sqrt3+2-3i\sqrt3=(-10+2)+(-8i\sqrt3-3i\sqrt3)\\\\=-8+(-11\sqrt3)i=-8-11\sqrt3i$

6 0

4 years ago

Factor the polynomial: – x3 - 4x2 - 5x

Alinara [238K]

Answer:

$-x3-4x2-5x=-x(x^2+4x+5)$

Step-by-step explanation:

we are given the polynomial as

$-x3-4x2-5x$

here we can see that the GCF of $-x^3$ , $-4x^2$ and $-5x$ is

$-x$

Hence we take it outside the bracket

$-x(x^2+4x+5)$

The polynomial within the bracket $x^2+4x+5$ can not be factorized further , hence this would be our final answer.

3 0

3 years ago

Penelope's recipe calls for 2 cups of flour to make a dozen cupcakes. How many cups will Penelope need to make one cupcake?

Bingel [31]

you take 2 divided by 12 push the equal sign and your answer will come out to equals 0.166

5 0

3 years ago

Students in biology are studying the macromolecules of life. They used a calorimeter to determine the calories in various types

Dimas [21]

Answer:D

Step-by-step explanation:

The answer is D

5 0

3 years ago

Read 2 more answers

Which system of equations models this problem? The variable x represents the number of angelfish Carlos bought and the variable

babymother [125]

It would be the first option..

7 0

3 years ago