<h3>
Answer: 5 - 4i (choice A)</h3>
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Work Shown:
x = the other number
(5+4i)*x = 41
x = 41/(5+4i)
x = 41*(5-4i)/( (5+4i)*(5-4i) ) ..... see note below
x = 41*(5-4i)/( 41 )
x = (41/41)*(5-4i)
x = 5 - 4i
As a way to check, (5+4i)*(5-4i) = 5^2+4^2 = 25+16 = 41
The rule used is (a-bi)(a+bi) = a^2 + b^2
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Note: I multiplied top and bottom by (5-4i) to get rid of the imaginary term in the denominator.
Answer:
C. Back 2N
Step-by-step explanation:
Let forward vectors be positive (+) and backward vectors be negative.
Now take the net force of the two vectors.
=> (+18) + (-20)
=> (-2)
=> (-) Negative sign indicates it backwards and magnitude is 2
=> Therefore sum of vectors is back 2N.
Answer:
retrt
Step-by-step explanation:
erterst
