Welcome :: Homework Help and Answers :: Mathskey.com

Q&A
Unanswered
Categories
Users
Ask a Question

Welcome to Mathskey.com Question & Answers Community. Ask any math/science homework question and receive answers from other members of the community.

Q&A Categories
BASIC MATH (93)
PRE-ALGEBRA (441)
ALGEBRA 1 (2,220)
GEOMETRY (864)
ALGEBRA 2 (2,751)
TRIGONOMETRY (1,187)
PRECALCULUS (1,903)
CALCULUS (2,802)
STATISTICS (129)
PHYSICS (659)
CHEMISTRY (137)
MECHANICAL ENGINEERING (64)
ELECTRICAL ENGINEERING (207)
Winplot Tutorials (2)

Most popular tags

solving-equations system-of-equations functions math slope-intercept-form physics homework-help trigonometric-identities integration limits substitution-method calculus

13,459 questions

17,854 answers

1,446 comments

811,210 users

please help!

0 votes

1-2 = -1 prove it how?

solve-equation

asked Nov 12, 2013 in ALGEBRA 1 by andrew Scholar

Share this question

Google+ Facebook Twitter LinkedIn Reddit

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

0 votes

1, -2 are two integers.

Integers obey the closure law under addition property.

1-2 = 1+(-2)

= -1

answered Nov 12, 2013 by william Mentor

Please log in or register to add a comment.

Related questions

Algebra math help please?

asked Feb 10, 2014 in ALGEBRA 1 by abstain12 Apprentice

solve-equation

please help!

asked Nov 21, 2013 in ALGEBRA 1 by skylar Apprentice

solve-equation
y-intercept

Please help!! Solve for M: R=5m-40t?

asked Nov 9, 2013 in ALGEBRA 1 by futai Scholar

algebra
solve-equation

Math question help please?

asked Nov 9, 2013 in ALGEBRA 1 by chrisgirl Apprentice

algebra
solve-equation
value

Algebra help please!

asked Nov 9, 2013 in ALGEBRA 1 by abstain12 Apprentice

algebra
solve-equation
number
inequality

Math HW help? Please Explain how its done?

asked Nov 4, 2013 in ALGEBRA 1 by andrew Scholar

algebra
factors
solve-equation

Math HW help? Please Explain how its done?

asked Nov 4, 2013 in ALGEBRA 1 by payton Apprentice

algebra
factors
solve-equation

Math help please?

asked Jul 22, 2014 in ALGEBRA 2 by anonymous

solve-equation

MATH HELP!!! PLEASE!!!!?

asked Jun 17, 2014 in ALGEBRA 2 by anonymous

solve-equation

Pre-Algebra Math Help Please?

asked Mar 5, 2014 in PRE-ALGEBRA by dkinz Apprentice

solve-equation
volume-of-cube
volume-of-a-sphere

Please help!!! solve for x:

asked Feb 12, 2014 in ALGEBRA 2 by payton Apprentice

solve-equation

Solve the Equation help please!?

asked Jun 27, 2013 in ALGEBRA 2 by andrew Scholar

solve-equation

Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!

asked Jun 21, 2013 in ALGEBRA 2 by andrew Scholar

solve-equation

Can you PLEASE check 3 more of my multiple choice algebra answers? THANK YOU?

asked Nov 13, 2013 in ALGEBRA 1 by mathgirl Apprentice

solve-equation
complex_numbers

MATH HELP 7

asked Aug 3, 2017 in ALGEBRA 1 by anonymous

math
homework-help
solve-equation

MATH HELP 8

asked Aug 3, 2017 in ALGEBRA 1 by anonymous

math
graphs
solve-equation
homework-help

MATH HELP 9

asked Aug 3, 2017 in ALGEBRA 1 by anonymous

math
graphs
center
solve-equation

MATH HELP 10

asked Aug 3, 2017 in ALGEBRA 1 by anonymous

math
homework-help
solve-equation

MATH HELP 11

asked Aug 3, 2017 in ALGEBRA 1 by anonymous

math
differentiation
graphs
solve-equation

MATH HELP 12

asked Aug 3, 2017 in ALGEBRA 1 by anonymous

math
homework-help
solve-equation
graphs

Copyright © 2024 MATHSKEY. All Rights Reserved. Sitemap|Terms Of Use|Disclaimer|Contact Us|FAQ

...