Subjects
PRICING
COURSES
SIGN IN
Start Free Trial
Wayne H.
Current Education Major
Tutor Satisfaction Guarantee
Natural Sciences
TutorMe
Question:

Which of the following is a possible cause for eutrophication? (a) over fishing of a local water supply (b) use of biodegradable products (c) sewage runoff (d) use of riparian buffer zones

Wayne H.
Answer:

(c) sewage runoff Eutrophication is the reduction of oxygen in a given body of water. Sewage runoff will increase nitrates in the water (much like fertilizer runoff). This promotes vegetation growth. This growth if untreated can cause a water source to no longer have the necessary oxygen to support life; producing a dead zone.

Earth Science
TutorMe
Question:

Which of the following is an example of an sedimentary rock? (A) limestone (B) granite (C) marble (D) obsidian

Wayne H.
Answer:

(A) limestone Limestone is the only sedimentary rock listed, it is formed through either organic or inorganic means. Although marble is the metamorphosed version of limestone, characteristics of the stone, and thus classification, have changed.

Algebra
TutorMe
Question:

Suppose, x²+7x+12=0, factor the expression:

Wayne H.
Answer:

To begin factoring this quadratic you need to find factors of 12 that add up to 7. 3*4=12, 3+4=7 Next you will need to rewrite the expression within parenthesis: (x+3)(x+4)=0 An easy way to check you answer is to FOIL, (First, Outside, Inside, Last) x(x)+4x+3x+3(4)=0 x²+7x+12=0 Therefore; (x+3)(x+4)=0 will be your completed factoring. With this information you can further graph your quadratic.

Send a message explaining your
needs and Wayne will reply soon.
Contact Wayne
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.