Answer:
the answer would be 21x^3 - 12x^2y^4, because you want to multiply 3x^2 and 7x first to make 21x^3, and then multiply 3x^2 and -4y^4 to get -12x^2y^4. hope that helps!
a) is the correct answer.
n = 5
Step-by-step explanation:
Given
3( n - 2) = 9 ( 6 - n)
3n - 6 = 54 - 9n
3 n + 9n = 54 + 6
12n = 60
n = 60/ 12
x=7
6x+11=7x+4
1/28 of the sack