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liq [111]
4 years ago
11

Subtract (8+7i)-(-2-i)

Mathematics
1 answer:
Ulleksa [173]4 years ago
8 0

Answer: 10+8i

Step-by-step explanation:

To subtract the expressions, you would first need to distribute the -1.

(8+7i)-(-2-i)           [distribute -1]

8+7i+2+i               [combine like terms]

10+8i

Now, we have the subtracted answer 10+8i.

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Could a set of three vectors in ℝ^4 span all ℝ^4? Explain. What about n vectors in ℝ^m when n is less than m?
Elena-2011 [213]

Answer:

Check the ecplanation

Step-by-step explanation:

A set of three vectors in R^{4} represents a matrix of 3 column vectors, and each vector containing 4 entries (that is, a matrix of 4 rows, and 3 columns).

Let A be that 4x 3 matrix. The columns of A span R^{m}. if and only if A has a pivot position in each row. So, there are at most 3 pivot positions in the matrix A, but the number of rows is 4, therefore, there exist at least one row not having a pivot position. If A does not have a pivot position in at least one row, then the columns of A do not span R^{4}. It implies that the set of 3 vectors of A does not span all of R^{4}.

In general, the set of n vectors in R^{m} represents a matrix of in rows, and n columns (an in x matrix). So, there are at most n pivot positions in the matrix A, but n is less than the number of rows. In therefore, there exist at least one row that does not contain a pivot position.

And, hence the set of n vectors of A does not span all of R^{m}. for n < m

8 0
3 years ago
The quotient of a number y and -3.6 is less than 6.5 <br><br> (written as an inequality)
elena-14-01-66 [18.8K]

Answer:

\frac{y}{-3.6} < 6.5

7 0
3 years ago
This is pretty easy, give me some synonyms for the word brazeness. When you do that find me some antonyms.
Alecsey [184]

Answer:

Synonyms: Shameless, bold, audacious

Antonyms: Timid, shy

Step-by-step explanation:

3 0
3 years ago
The Westside Bakery uses 310 pounds of flour to make 1,000 loaves of bread. Each loaf
DanielleElmas [232]

Answer:

310 / 1000 = 0.31 pounds

Step-by-step explanation:

When dividing by a number that is 1 less 0 than how many digits the number has, we can move the decimal point the number of times zero is repeated at the end of the number.

1000 has 3 zeroes, so we move the decimal point 3 moves to the left.

So, we do this:

After 0 moves: 310

After 1 move: 31.0

After 2 moves: 3.10

After 3 moves = 0.310

0.310 is the same as 0.31

Therefore, 0.31 pounds of flour are in each loaf.

7 0
3 years ago
What is (16x+9)+(−9x−5) ?
seropon [69]

Answer:

7+4

Step-by-step explanation:

hope it helps

8 0
3 years ago
Read 2 more answers
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