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Yuri [45]
3 years ago
8

PLEASE HELP PLEASE please

Mathematics
1 answer:
Romashka [77]3 years ago
4 0
You should know this if you rated yourself as college level...
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Which of the following is equivalent to the complex number -8(7i - 3i^2)
Leni [432]

Answer:  B) -56i - 24

This is the same as -24 - 56i

=============================================

Explanation:

The 'i' refers to the imaginary number \sqrt{-1}

In other words, i = \sqrt{-1}

Squaring both sides gets us i^2 = -1

So,

x = -8(7i - 3i^2)\\\\x = -8(7i - 3(-1))\\\\x = -8(7i + 3)\\\\x = -8(7i) -8(3)\\\\x = -56i -24 \ \ \text{ .... Answer: Choice B}\\\\x = -24 - 56i\\\\

The result is in the form a+bi where a = -24 is the real part and b = -56 is the imaginary part.

7 0
3 years ago
Find f (-12) if f (x) = -12x + 100​
Andrei [34K]

f(-12) = -12(-12) + 100 = 144 + 100 = 244

6 0
3 years ago
Read 2 more answers
Write "yes" or "no" to state whether or not the given side lengths would form a right triangle.
Slav-nsk [51]

Answer: No

Step-by-step explanation:

To find out if it is a right triangle then use the formula  a^2 + b^2 = c^2 where a and b are the legs which are the two small sides  and c is the hypotenuse the longest side.  Input the values for  a, b, and c and solve.

a = 12

b = 16

c= 25

12^2 + 16^2 = 25^2

144 + 256 = 625

   400 = 625

This means that it is not a right angle because 400 does not equal to 625.

7 0
3 years ago
Sonji has $5.25 in nickels and dimes.The coin value can be modeled by the equation 0.10 d plus 0.05 n equals 5.25, where d repre
Tpy6a [65]
The answer is for your question is 42
8 0
2 years ago
What is the relationship between the magic constant (the sum of each row) and the sum of all the numbers in the square? Why does
NARA [144]

Let's say each row sums to 15

If we had 3 rows, then the total sum would be 3*15 = 45

If we added all of the values in the 3x3 magic square, then we'd get 45 as well.

This is one example showing that

sum of all values = (number of rows)*(magic constant)

You can replace "rows" with columns to get the same idea, because each column also adds to the same magic constant. The diagonals are an exception since we only have two of them.

8 0
3 years ago
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