Search 75,602 tutors
WyzAnt Tutoring Tutor Tutor United States

# Lee J.

## Former college math/statistics instructor

### Tacoma, WA (98433)

Hourly fee \$45.00
 You don't pay for tutoring unless you find a good fit! You don't pay for tutoringunless you find a good fit!

# how do you simplify x^3-8/x^2-4? (answer)

It suppose to be (x^3-8)/(x^2-4)   x^3-8 = (x-2)(x^2+2x+4) x^2-4 = (x-2)(x+2) therefore, (x^3-8)/(x^2-4) = (x^2+2x+4)/(x+2)  <-- (x-2) cancelled out. The answer is (x^2+2x+4)/(x+2)     Lee

# Compute the mean and variances of the following discrete probability and distribution. (answer)

mean = sum of x*P(x) = 2x0.50 + 8x0.30 + 10x0.20 = 5.40 variance = sum of x^2*P(x) - mean^2 = 2^2*0.50 + 8^2*0.30 + 10^2*0.20 - (5.40)^2 = 2.00 + 19.20 + 20.00 - 29.16 = 12.04   I hope you understand how the answer came out.   Lee

### Lee's Hourly Rate

Hourly Fee: \$45.00

Save up to 15% with a discount package

### Background Check Status for Lee J.

Lee J. has not yet had a background check. After sending a message to Lee, you will be able to order a background check for \$7.99. The check will be processed by First Advantage. For more information, please review the background check information page.

As part of your tutor selection process, we encourage you to run updated background checks. Please also review the safety tips for hiring tutors.