Answer:
6x-21
Step-by-step explanation:
(20 + 12) - 8, since the question states n is EIGHT less than the sum of 20 and 12.
Whatever number is the exponent if negative just move it to the right how much the number is. if it 5 with an exponent of -3 then you just move the decimal point 3 times to the right. The anwer to that question would be .005
