See if you can help thank you!!
2 answers:
The way to read math problems is to read and do little parts at a time. Don't try and understand it all at once. That's what you try and do when you are reading a novel or a persuasive essay. Do things as you would when you are trying to parse a sentence.
The numerator is determined by the language before the word divide. What does it say? Concentrate on everything after square.
sum of 7 times x plus 3. That translates into 7x + 3
Now go look at the word square. It means that you square 7x + 3
Numerator: (7x + 3)^2
Guess what? You have already eliminated B and D. So you are left with A and C.
Denominator: difference between x and 1. Difference means subtract so you have x - 1
Denominator: 4 times the difference between x and 1: 4*(x - 1)
Now put them together.
numerator / denominator
which is C.
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Answer:
Step-by-step explanation:
Given the expression
solving the expression
so the expression becomes
Thus,
Answer:
The number of elephant ears that must be sold to maximize profit is 400.
Step-by-step explanation:
Given that,
The profit that a vendor makes per day is given by
P(x)= - 0.004x² +3.2 x -200
where x is number of elephant ears.
P(x)= - 0.004x² +3.2 x -200
Differentiating with respect to x
P'(x)= - 0.008x+3.2
Again differentiating with respect to x
P''(x) = -0.008
For maximum or minimum P'(x)=0
- 0.008x+3.2=0
⇒0.008x=3.2
⇒ x = 400
Since at x=400, P''(x)<0, the profit is maximize.
P(400) = -0.004×400²+3.2×400-200
=440
The number of elephant ears that must be sold to maximize profit is 400.