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Answers by Marc S.

This falls into the category of a very poorly written question which is probably one reason why no tutor has answered it for months. The question assumes a different type of universe where a student can predict their expected grade and number of hours per week they need to devote to a course...

Well, in terms of definitions, a macromolecule is just a very large molecule. But there's a lot more to macromolecules than just their definition. Depending on the exact course you're taking and the level that it's being taught, you might be expected to know a more specific definition or particular...

It sounds like you might be in a linear algebra course or maybe you're taking an advanced algebra or precalculus course. There are several different expected ways to answer this question depending on which course you're taking and the material you've learned so far. A cumbersome-but-most-likely-to-be-familiar...

Hi Nish, and welcome to the wonderful world of factoring polynomials of degree 3 and above. That wild beast is a quartic because it's degree 4, and here's how I would try to tame it by factoring it into nice domesticated polynomials of degree 1 and 2. These are the the linear and quadratic polynomials...

Before solving this problem, it's useful to know how the three Pythagorean identities arise from the Pythagorean formula. If you have a right triangle, select one of the non-right angles as x, and label the three sides as adj, opp, and hyp to represent the lengths of the sides adjacent to x,...

I think the answer is "zero pair," but I don't think I would have gotten it without your hints! A zero pair is two manipulatives representing numbers that make zero or two numbers that make zero. Zero pairs are used in prealgebra to help students learn integer arithmetic, but most students...

Hi Ej, A probability model is just a set of all possible outcomes. For this carnival game, I'm assuming that you're not permitted to keep playing after you win, so the two general classes of outcomes are you either win within 4 throws and then stop playing or you don't win within 4 throws...

This is a domain question in disguise. Most high school and college math textbooks introducing inverse trigonometric functions would indicate that the value of sin(sin−1(1.325)) does not exist because sin−1(1.325) doesn't exist. The sine of any real angle must fall between −1 and 1. This...

Let's start with the answer! Be sure to check out http://www.wolframalpha.com/input/?i=Simplify+%283q^2%2B9q%2B6%29%2F%289q^2-36q-45%29 . Wolfram Alpha today is like calculators were in the 1970s. Using it and playing with it will help you learn math. Now on to the skills you need to solve...

e^x-4 [-1,3] (answer)

∫−13 |ex−4| dx is the area between the function and the x-axis. With f(x) = ex−4, the function being integrated, g(x)=|ex−4|, is equal to f(x) when f(x)≥0, and g(x) = −f(x) = 4−ex when f(x)≤0. So we need to take the extra pre-calculus step of determining the values of x that make f(x) positive...

Hi Vishwa. The area between a function and the x-axis (which is the same as the line y=0) is found from the integral of the function. What you need first are the values of x that bound the area you're interested in finding. One value is given to you: x=1. You can find the other value by solving...