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# Precalculus Homework Help: Answers & Questions

## Find your perfect Precalculus tutor.

❶Schneider , John Hornsby , Margaret L. Did you know that we hold strong experience and exposure in handling precalculus tasks?

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I have a great interest in education sector. I have my own way of teaching which varies from student to I have been teaching since last 35 years and it has become my life.

I love teaching and can go to the level of the grade of a child to make him understand. I was born and raised in Nicaragua. Lived in Costa Rica for 3 years and came back to start high school in Nicaragua, once I started high school I became as involved in I'm very interested in sustainability and environmental science. Partha Sarathi Reddy K. I have graduated with major in Electrical and Electronics Engineering.

Ever since I took math class at elementary school, I loved learning math. I was so curious in I am always ready to help students who need my help as it gives a sense of immense satisfaction. This cost can be attributed to the costs of manufacturing the dolls.

Now divide the manufacturing cost by the cost to manufacture a single doll: Every rectangle has a perimeter which can be represented by this equation: Every rectangle's area can be represented by this area formula: Using the equation for the perimeter, we can express one dimension in terms of the other. Let's express L as a function of W: Now we plug L in terms of W into the formula for the area: Now we rearrange the terms of the last equation to get this: Now we complete the trinomial square on the right side of the equation.

But first we must factor out -1 from each of the terms on that side: Now we put the equation in what is called the vertex form for the equation of a parabola. This step is critical, because it tells us the maximum value for the function. This particular function has a maximum at the vertex, because the sign in front of the expression on the right side is negative, i.

At that x value, which is W in our equation, the functional value is at a maximum. This means that the rectangle is a square. Related Questions Pre-calc homework help? Pre calc homework help?