Mr. White is paid a weekly salary of $1,500. How much will he earn in a year?
2 answers:
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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
The correct answer is 
You can find this by first starting with the original question.
÷ 
Now to solve a division problem with fractions, you can always flip the second one and turn it into multiplying.
* 
Now we can multiply numerator by numerator and denominator by denominator.
Then of course, we need to simplify. Since both are divisible by 3, we can divide both numbers by 3.
You can find this by first starting with the original question.
Now to solve a division problem with fractions, you can always flip the second one and turn it into multiplying.
Now we can multiply numerator by numerator and denominator by denominator.
Then of course, we need to simplify. Since both are divisible by 3, we can divide both numbers by 3.
x = ±
i
rearrange the equation and equate to zero
2x² - 6x = - 5 ⇒ 2x² - 6x + 5 = 0
this doesn't factor with integers, hence use the quadratic formula to solve
with a = 2, b = - 6 and c = 5
x = (6 ± √(36 - 40 ) )/4
= (6 ± √(-4) ) / 4
= (6 ± 2i ) / 4
x = ±
i