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Neko [114]
3 years ago
13

What is the right answer for 9i x 2i?

Mathematics
1 answer:
nevsk [136]3 years ago
3 0
The correct answer is:   -18 .
________________________________________

 9i * 2i = 18 i² .
________________________________________
  " i " is an imaginary number equal to "√(-1) " .
  
  " i² " = [√(-1)] ² = √(-1) * √(-1) = -1 .
________________________________________
   18 * i²  = 18 * -1  =  -18 .
________________________________________

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Points A, B, C, and D are collinear and positioned in that order. Find the length indicated 7) Find BC if BC = 2x + 4, AD = 28,
belka [17]

Answer:

  7)  BC = 10

  8)  BD = 20

Step-by-step explanation:

7) The segment addition theorem tells you ...

  AB +BC +CD = AD

  (3x+2) +(2x+4) +(3x-2) = 28

  8x +4 = 28 . . . . collect terms

  8x = 24 . . . . . . . subtract 4

  x = 3 . . . . . . . . . divide by 8

  BC = 2x+4 = 2(3) +4

  BC = 10

__

8) AB +BD = AC +CD

  (2x -14) +(-7 +3x) = (2x -3) +(9)

  5x -21 = 2x +6

  3x = 27

  x = 9

  BD = -7 +3x = -7 +3(9)

  BD = 20

7 0
3 years ago
I am studying for a Calculus test and have the answers for the study guide but I'm having trouble with problems 2, 3, 4 (finding
Mariulka [41]
#2) Use quotient rule
\frac{f'g - fg'}{g^2}
Remember for solving log equations:
e^{ln x} = x

#3) Derivative of tan = sec^2 = 1/cos^2
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#4 Use Quotient rule

#9  Use double angle identity for tan
tan(2x) = \frac{2tan x}{1-tan^2 x}
This way you can rewrite tan(pi/2) in terms of tan(pi/4).
Next use L'hopitals rule, which says the limit of indeterminate form(0/0) equals limit of quotient of derivatives of top/bottom of fraction.

Take derivative of both top part and bottom part separately, then reevaluate the limit. <span />
4 0
3 years ago
What is the circumference of a circle having a radius of 56 mm<br>​
MArishka [77]

Answer:

circumference is πd

d=112mm

22/7*112

=352mm

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Can someone please help me? I can't find the h(x) for 0. I also need help with the last question. Please I need it very soon.
Solnce55 [7]

9514 1404 393

Answer:

  see attachments for a table and graph

Step-by-step explanation:

I find it convenient to use a graphing calculator or spreadsheet to do repetitive computations reliably.

__

Your specific question asks for h(0):

  h(0) = -|0 +2| +1 = -2 +1

  h(0) = -1

You may want to check your other table values.

8 0
2 years ago
Please some help me!!!
DiKsa [7]
The mistake that was made is that she should of multiplied the fractions by the exponents first 
6 0
3 years ago
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