For i = \-1, what is the sum (7+3i) + (-8+9i) ?

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

What other information do you need to prove triangle dac=bca by asa

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11