TutorMe homepage

SIGN IN

Start Free Trial

Jesus R.

Computer science student with years of tutoring experience.

Tutor Satisfaction Guarantee

Linear Algebra

TutorMe

Question:

The inverse of the matrix [ 4 3 ] is: [ 9 7 ]

Jesus R.

Answer:

The matrix A = [ a b ] is invertible if and only if ad - bc is not equal to 0, in which case the [ c d ] inverse is given by the formula A^ -1 = 1/ ad - bc [ d -b ]. Therefore. we have 7 * 4 - 9 * 3 = 28 -27 = 1. [ -c a ] We then have 1/1 [ 7 -3 ] which equals [ 7 -3 ] [ -9 4 ] [ -9 4 ]

Discrete Math

TutorMe

Question:

Find the contrapositive of the following statement: If the product of two integers is even, then one of the two integers is even.

Jesus R.

Answer:

The original statement is in the form P->Q. To form the contrapositive, you must switch P and Q and negate them both. It will look like this: ~Q -> ~P. The answer would then be: If two integers are not even, then the product of the two integers is not even.

Statistics

TutorMe

Question:

Find the sample mean of the given data: 6, 3, 7, 5, 1, 2, 5, 6, 9

Jesus R.

Answer:

You can find the sample mean by adding all the numbers and dividing by how many numbers you have. So we have 6 + 3 + 7 + 5 + 1 + 2 + 5 + 6 + 9 which gives us 44 and we divide that by 9 because that's how many numbers we are working with. This gives us 4.89., which is the final answer.

Send a message explaining your

needs and Jesus will reply soon.

needs and Jesus will reply soon.

Contact Jesus

Ready now? Request a lesson.

Start Session

FAQs

What is a lesson?

A lesson is virtual lesson space on our platform where you and a tutor can communicate.
You'll have the option to communicate using video/audio as well as text chat.
You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.

How do I begin a lesson?

If the tutor is currently online, you can click the "Start Session" button above.
If they are offline, you can always send them a message to schedule a lesson.

Who are TutorMe tutors?

Many of our tutors are current college students or recent graduates of top-tier universities
like MIT, Harvard and USC.
TutorMe has thousands of top-quality tutors available to work with you.

Made in California

© 2018 TutorMe.com, Inc.