Answer:
b
Step-by-step explanation:
Answer:


Step-by-step explanation:
i is an imaginary unit, this means

Rewrite -5 as 
then

Rewrite -25 as 
then

Answer:
40/2+14/7=27
Step-by-step explanation:
First I would break it down int 50 + 4 but either way you divide both by two
Answer:
750
Step-by-step explanation:
10 times 5 times 15
Answer:
-4/3
Step-by-step explanation:
give 90°<Ø<180° show in Q2
and cscØ=5/4
tanØ in Q2 is minus
so tanØ is -4/3 #