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

808,082 users

If x +y=xy=3

0 votes

find x^3+y^3.

cubic
formula

asked Nov 16, 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

x+y=3

xy=3

Recall the cubic formula

(x+y)^3=x^3+y^3+3xy(x+y)

Substitute the required values

3^3=x^3+y^3+3*3(3)

27=x^3+y^3+27

x^3+y^3=0

answered Nov 16, 2013 by bradely Mentor

Please log in or register to add a comment.

Related questions

How do I solve

asked Nov 10, 2013 in ALGEBRA 1 by abstain Rookie

expression
solve
cubic

Sketch the region whose area is given by the definite integral.

asked Jan 26, 2015 in CALCULUS by anonymous

definite-integral
geometric
formula

THE FORMULA FOR THE POWER OUTPUT P OF A BATTERY IS P-VI-RI^2.

asked Sep 27, 2014 in CALCULUS by anonymous

maximum-value
current
formula

A line with coordinates (−15,5) and (−10,−5) has a slope of:?

asked Mar 1, 2013 in PRE-ALGEBRA by chrisgirl Apprentice

slope
formula

If 4 x^2+ 4 x + xy = 3 and y( 3 ) = -15

asked Aug 7, 2014 in PRECALCULUS by anonymous

implicit-differntiation

midpoint xy is 3, -5, find the coordinate of point x if y = -10, 5

asked Mar 3, 2014 in GEOMETRY by futai Scholar

mid-point-of-a-line
midpoint-of-a-coordinate

Find the product of xy if x, 2/3, 6/7, y are in GP

asked Mar 1, 2013 in BASIC MATH by Afeez Novice

division

if x and y are ywo real numbers 9x^2+4y^2=97 and xy =97

asked Oct 25, 2014 in ALGEBRA 2 by anonymous

simplify-expression

The coordinates of point Y are giving. The midpoint XY is (3,-5). Find the coordinates of point X.

asked Oct 20, 2020 in GEOMETRY by anonymous

midpoint

F(xy) = (1/3)x^3 + 4xy - 9x - y^2?

asked Jul 21, 2014 in PRECALCULUS by anonymous

local-minimum-maximum-saddle

solve: y^3 dx+2(x^3-xy^2) dy=0

asked May 4, 2014 in PRECALCULUS by anonymous

differentiation

add (4x^2 - 8xy + y^2) + (-8x^2 - 9xy - y^2) + (x^2 + xy - 8y^2)

asked Mar 12, 2014 in ALGEBRA 1 by payton Apprentice

adding-powers

1/x + 1/y = 7/12 xy = 12 find x and y

asked Feb 11, 2014 in ALGEBRA 1 by skylar Apprentice

fractions

loga xy^3=9; loga x^2y=8

asked Jul 20, 2013 in ALGEBRA 1 by futai Scholar

logarithmic-expression

If y = 2 when x = 1, find y when x = 3

asked Dec 5, 2013 in ALGEBRA 1 by homeworkhelp Mentor

direct-variation

If y=2/5 when x = 1/3 find y when x=1/4.

asked Dec 5, 2013 in ALGEBRA 1 by linda Scholar

direct-variation

If x/y+1=2/3 and y/z=1/2,

asked Aug 4, 2013 in ALGEBRA 1 by chrisgirl Apprentice

ratios

Segment XY has endpoints X = -72 and Y = 43. What is XY?

asked Mar 5, 2014 in GEOMETRY by homeworkhelp Mentor

endpoints-of-a-segment

XY has endpoints X(7, 10) and Y(5,-8) find the coordinates of the midpoint of XY

asked Mar 3, 2014 in GEOMETRY by chrisgirl Apprentice

mid-point-of-a-line
midpoint-of-a-coordinate

find the product of (x+y)(x^2-xy+y^2)=?

asked Feb 11, 2014 in PRECALCULUS by futai Scholar

polynomial

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

...