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dsp73
4 years ago
15

Simplify the expression (9 + 2i)(9 − 2i). 81 − 18i 81 + 18i 77 85

Mathematics
1 answer:
Ymorist [56]4 years ago
5 0

Answer:

=85

Step-by-step explanation:

I'm pretty sure I'm correct

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What is the missing value
Kisachek [45]

Answer:

18

Step-by-step explanation:

I did my method that I was taught but if you do (-5) - (-2), you get 3. So you subtract 39 by the -21 to get 18.

8 0
3 years ago
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How do you Divide 61,986 ÷23
Minchanka [31]

Answer:

2695.04348

Well, I don't want to do ALL of the work but I'll give you an idea of how I got it:

First, ask yourself, "How many times does 23 go into 61?" which is the same thing as 61 divided by 23.

23 times 2 equals 46. I chose this number because 23 times 3 equals 69 and that is too much.

(The first digit is 2)

So 61 minus 46 equals 15. Then you bring down the 9 and divide 159 by 23.

23 times 6 is 138 and the closest you will get. Again, 159 minus 138 equals 21.

(Now the second digit of the answer is 6)

Bring down the 8 to get 218. 218 divided by 23 equals 9 (well, not exactly, but you get what I mean). 23 times 9 equals 207. 218 minus 207 equals 11.

(Don't forget, the third digit in the answer is now 9)

Keep doing this until you get your final answer, which I already gave you at the top to double check. When you reach the last number of 61,986 (which is 6), go into the decimal place and keep on working from there.

6 0
3 years ago
A man wishes to cover his floor with tiles, each one measuring 3/4
Allushta [10]
12\cdot18=216 \ ft^2\leftarrow\hbox{ area of the floor}\\
\frac{3}{4}\cdot2=\frac{3}{2}=1.5 \ ft^2 \leftarrow \hbox{area of a tile}\\\\
\frac{216}{1.5}=144 \Rightarrow A

3 0
3 years ago
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ASAP!! WILL GIVE BRAINLIEST!! What is the equation of the line through (4, 5) and (0, -3)?
Darina [25.2K]

Answer:

A. y = 2x - 3

Step-by-step explanation:

5 0
3 years ago
The Hernandez family has a pool that holds 10,450 gallons of water. They are draining it in order to fix a crack in the wall. Th
ryzh [129]

Answer:

f(x) = 2x + 5

the bucket starts with 5 gallons of water and is being filled at a rate of 2 gallons per minute

Step-by-step explanation:

6 0
3 years ago
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