Answer:
2
A)-7y^3-3y^2-2y-8
B)-7x^3y^3-12x^2y^2-xy
C)2xy^3+3xy^2-5
3
A)14x^2
B)15a^2+30ab
Step-by-step explanation:
If Zack walks a 7-mile route every day, and he goes on for 22 days, the answer is 154, because you are multiplying 7 by 22 (7 x 22 = 154).
Answer: 0=-4.9t²+19.6t+24.5
Step-by-step explanation:

The formula for the triangular sequence is Xn=n(n+1)/2
So X25=25(25+1)/2=325