Answer:
square root(-1) = i
Step-by-step explanation:
Answer:
40 degrees
Step-by-step explanation:
Answer:
the first one is -9/40. the second one is 109/20. the third one is -8/35.
Step-by-step explanation:
here is the work for the first one 3/8-.6 and convert into a simplified fraction and came up with -9/40. here is the work for the second one 4 4/3+0.7 and then convert into a simplified fraction and came up with 109/20. here is the work for the third one 4/7-0.8 and then convert into a simplified fraction and came up with -8/35.

There's no solution in the set of real numbers.
It would be -2z+8. Because 3z+-5 is -2 and 2+6 is 8.