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ASHA 777 [7]
3 years ago
13

What times what equals 225?

Mathematics
1 answer:
defon3 years ago
4 0
I got 5 times 45 because I multiplied by 5 to get my answer.
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please help me The question involves multiplying two complex numbers, then turning it into an a+bi equation (pictures included)
Sloan [31]

Answer:

  (a, b) = (0, -15)

Step-by-step explanation:

In "cis" form the product of two complex numbers is the product of their magnitudes at the angle that is the sum of their angles. I find this the easiest way to multiply complex numbers.

  z1 × z2 = (3 cis π)(5 cis π/2)

  = (3·5) cis (π +π/2)

  = 15 cis 3π/2

Of course, "cis" is short for "cosine + i·sine", so you have ...

  z1 × z2 = 15 cis 3π/2 = 15(cos(3π/2) +i·sin(3π/2))

  = 15(0 +i·(-1))

  = 0 -15i

(a, b) = (0, -15)

8 0
3 years ago
A class is made up of 10 boys and 4 girls. Half of the girls wear glasses. A student is selected at random from the class what i
ZanzabumX [31]

Answer:

2/14 or 1/7

Step-by-step explanation:

Half the girls where glasses so 2 girls.

there are only 2 girls that wear glasses out of all the 14

so the answer is 2/14

8 0
3 years ago
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The 4th tetm of a G.P. is 54 and the 6th term is 24. Is 64/9 a term of the G.p.?​
julsineya [31]

Answer:

d

Step-by-step explanation:

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3 years ago
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Caroline’s cell phone plan costs $32 per month. Which table shows the sum of the amounts that Caroline will pay for her cell pho
Greeley [361]

Answer:

the answer is j

Step-by-step explanation:

32 plus 32 is 64 and 32 plus 64 is 96 so foth and so on

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Find 5 - (-7) <br> 5 - (-7) = 5+ Write as addition,​
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Answer:

7

negative of a negative number is equal to the positive of that number

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3 years ago
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