Please help me with my math? I had 20 problems and now I'm stuck.

Choose the correct simplification of the expression (−11x3y12z3)0.
0
6x3y12z3
−11
1

Choose the correct simplification of the expression −6x2(4x − 7x2 − 2).
42x4 + 24x3 − 12x2
−42x4 + 24x3 − 12x2
−13x4 − 2x3 − 8x2
42x4 − 24x3 + 12x2


[7.06] Choose the correct simplification of the expression (−2x + 6y)(4x − 6y).
8x2 + 36xy − 36y2
−8x2 − 36xy + 36y2
−8x2 + 36xy − 36y2
−8x2 + 12xy − 36y2

[7.06] Choose the correct simplification of the expression (8x − 5)(2x2 − 5x − 6).
16x3 − 50x2 − 23x − 30
16x3 − 50x2 − 23x + 30
16x3 − 30x2 − 23x + 30
16x3 + 50x2 − 23x + 30


[7.07] Choose the correct product of (2x + 10)2.
4x2 − 100
4x2 + 40x + 100
4x2 + 100
4x2 − 40x + 100


Choose the correct product of (3x − 8)2.
9x2 − 64
9x2 + 64
9x2 − 48x + 64
9x2 + 48x + 64

for #1 if the zero is the exponents than the answer is 1 but if multiplying by zero than answer is 0

-24x^3 +42 x3 + 12x2 answer is D

-8x2 +36xy -36y2 answer is c

16x3 -50x2 -23x +30 answer is B

4x2 + 40x +100 answer is B

For the last one i'm assuming the 2 is the exponent so the answer is 9x2 - 48x + 64 answer is C

1 okay, what is anything times 0?
#2 what is the only answer containing -6x2(-2)?
#3 what answer has 24xy - 12xy?
#4 distribute out. Concentrate on the signs
#5: a and c are eliminated. problems in that form cause trinomials. There are no negatives in the problem, so what does that imply about the solution?
#6: a and b are eliminated (see #4). There is a negative in the problem, so what does this imply?

For the last problem, the answer is the third choice.