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Answer:
no. i*i = -1
2i*3i=-6
now if they meant complex numbers the answer is still no
(2+4i)(2-4i) = 4-8i+8i-16 = -12
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Answer:
He should sell his CD's for $2.
Step-by-step explanation:
Each crate contains 60 blank CD’s and each crate cost $35.
This means that he will pay $35 for 60 CD's.
How much should he sell his CD’s to make a profit of $85?
He will sell each of the 60 CD's for x, which means that his earnings will be of 60x.
Profit: Earnings - Cost = 60x - 35
To make a profit of $85
He should sell his CD's for $2.
Subtract the two equation from each other
-3x-7y=-66
-10x-7y=-24
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7x =-42
x=-6
by substituting in equation 1
(-3)(-6)-7y=-66
18-7y=-66
-7y=-84
y=12
so to check we substitute in the first equation
(-3*-6)-(7*12)=-66
18-84=-66
-66=-66
we check the second equations
-10(-6)-7(12)=-24
60-84=-24
-24=-24
When two triangles are congruent, everything in them is congruent (same). So, the angle bisector of one triangle is congruent to the corresponding angle bisector of the other triangle.
