My name is David U., but many just know me as Dave the Math
Tutor. I've been a professional math tutor for over 30 years, and I can help you make sense of anything mathematical, from elementary arithmetic to pre-algebra
, algebra, geometry
, differential equations
, linear algebra
, number theory, and more, including test prep for tests like the ACT
, CSET, GMAT
, and GRE
. With me you can learn to master the basics, then bump your grade up a notch by learning the shortcuts to take, the pitfalls to avoid, and the special tricks that can make your work quicker, easier, and less prone to error.
I have a B.A. in Math and a wealth of experience working with students of all ages and levels. My students often tell me they appreciate my broad knowledge, my enthusiasm and love of math, my clear and straightforward explanations of mathematical concepts, and my patience and good humor. I'm available days, evenings, and weekends, and I'd love to help you master math.
My rates are reasonable but not low; you can easily find cheaper math tutors. Finding a better tutor, though, would not be so easy! So when quality is more of an issue than price, get in touch with me and find out just how helpful a top-notch tutor can be. I look forward to working with you.
24 hours notice required
My listed rate of $40/hour assumes that you will travel to me (near Sac City College). If you prefer I can travel to you, anywhere within Sacramento and nearby suburbs; the rate for that is $50/hour.
Travels within 10 miles of Sacramento, CA 95818
Tutors have the ability to create educational resources and share them with the WyzAnt community.
Here are some of the resources created by David.
View all of David’s resources
This problem can also be done without resorting to complex numbers.
Complete the square on the denominator:
s2 + 2s + 5 = (s+1)2 + 4
Since the denominator is now expressed in terms of s+1, express the numerator...
Both of the previous answers give the result as 4%. However, that's the percentage of the cake
that has been eaten. The question asks what percentage of the cake
is left, which is the remaining 96%.
I don't see any reason to do this in decimal form. Like many fraction problems, it's done most easily as a common fraction.
Begin by putting the .21 over the .33. Now you have .21/.33. Get rid of the decimals by multiplying by 100/100. that gives you 21/33. ...