Answer:
1 and 1
Step-by-step explanation:
degree of 1 and 1 term.
2z +7 = -5
2z = -5 -7
2z = -12
z= -12 /2
z= -6
Answer:
Time=
years
Step-by-step explanation:
Let total time
Initial Amount
Final Amount
Total interest = Final Amount - Initial Amount

Simple Interest 
Judging by the question I noticed that the two both share x^3 in common. You can divide x^4 by x^3 and get x as a result, and x^3 can still divide into itself.
Thus your answer should be C, x^3