Answer:
the answer is A,
P(x) = -0.4x³+100x²-900x+500
Step-by-step explanation:
monthly cost:

monthly revenue:

profit function:


i) remove the first bracket

ii) there is a negative sign, '-' in front of the second bracket. so, change the sign of each term of the expression inside the bracket

iii) collect like terms

iv) simply the like terms

Answer: C
Step-by-step explanation: All the the numbers can be multiplied evenly into 15a^2b^2
>5a^2b *3b = 15a^2b^2
>15ab^2 * a =15a^2b^2
>15a^2b * b =15a^2b^2
1/6 + 1/3 + 1/2 is 1
first u need to find the GCF which is 6 here
convert all the denominators to 6
1/6 + 2/6 + 3/6
when you add them all together u get 6/6 which is also equivalent to 1