3.8 because 14+6=20 and .5*20=10 so then you do PEMDAS which means parenthesis, exponents, multiply, divide, add, subtract left to right. So the equation now is 1.8+10-8 so you would do 1.8+10=11.8 and 11.8-8=3.8. In PEMDAS you do the parenthesis first then the exponents and then multiply and divide and then when there is only add and subtract left in the equation you do it left to right.
Answer:
-18/3x - 9
Step-by-step explanation:
-9(2/3x + 1)
Expand.
-18/3x + -9
It cannot be be Integers because Integers include negative numbers (which are not counting numbers)
It cannot be real numbers because like integers, it includes negative numbers but also includes decimals which are not counting numbers
It cannot be absolute values because absolute values is the range of how far away a number is from 0 which obviously isn't counting
That leaves natural numbers which are counted in sequence which fits the definition needed
Answer: D. Natural Numbers
(-x+9)(-x-9) - prefect square
(xy + x)(xy + x) - perfect square
(2x-3)(-3+2x) - not a perfect square
(16- x²)(x2 – 16) - not a perfect square
(4y? +25)(25+4y?) - not a perfect square
