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ANTONII [103]
3 years ago
14

Please can someone help me ?

Mathematics
2 answers:
anygoal [31]3 years ago
5 0

Answer:

-3-5i

Step-by-step explanation:


Eddi Din [679]3 years ago
4 0

z = -14 + 21i / -2 - 4i


Rectangular form:

z = -14-14.5i


Exponential form:

z = 20.155644 × ei (-133°59'42″)


Polar form:

z = 20.155644 × (cos (-133°59'42″) + i sin (-133°59'42″))


Polar form - absolute value (modulus) and angle (argument):

r = |z| = 20.15564

φ = arg z = -133.99491° = -133°59'42″ = -0.74442π


Calculation steps


   Divide: 21i / (-2) = -10.5i

   Add: -14 + (-10.5i) = -14-10.5i

   Subtract: (-14-10.5i) - 4i = -14 + (-10.5-4)i = -14-14.5i




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7 0
3 years ago
4) Adult tickets for the evening show at XD Theater are $11 and children's tickets are $Belf the theater seats 250 people, how m
kozerog [31]

Omitted value: The price of children ticket was omitted in the question, so i used $8 to solve. You can input the correct value and solve the same way following the steps.

Answer: 100 adult tickets  must be sold.

Step-by-step explanation:

step 1

let  x represent Adults

AND y represent children

Since the theater seats 250 people we have that

x+y = 250..... equation 1

Also price for Adult ticket = $11

and  price children ticket =$8

With total sales at $2,300, we have that

11x + 8y= 2300----- equation 2

Step 2

Making y subject in equation 1

' x+y = 250

y= 250-x

Putting y= 250- x in equation 2

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To find y

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100+y=250

y=250-100

y=150

Therefore 100 adult tickets and 150 children tickets must be sold to get a total sales of $2,300

5 0
3 years ago
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