Answer:
a^2/3
Step-by-step explanation:
the numerator simplifies to 5a^3 and the bottom is 15a. we can use our exponent rules to subtract exponents, so it is 1/3(a^2). this simplifies to a^2/3.
12 x 6s - 8 x 4s = 72s - 32s = 40s
Its the 2nd one becuase 2(-1)+2=0 witch is greater than -4.
By adding 6, the next number should be 158
