How many pairs of (x,y) satisfy the equations 3x+6y=21 and 4x+8y=16

2 years ago

Share

Answers : (4)

                                        

as 3/4=6/8  so these lines are parallel, i.e. have no common point, so 0 pairs of (x,y) will satisfy this

2 years ago
                                        

3x + 6y = 21


or, x+2y=7


 


4x+8y=16


x+2y=4


 


Inconsistent equations. No solution.

2 years ago
                                        

dear suresh,


these two equations reaemble two parallel lines as a1/a2=b1/b2not equal to c1/c2.


so these two lines never intersect and thus have no solution

one year ago
                                        

no solution since they are parallel lines
please post some tough questions next time
:)

one year ago

Post Your Answer

More Questions On Algebra

Ask Experts

Have any Question? Ask Experts
Post Question
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details
Let a1, a2, a3, ….. be an A.P. Prove that
 
 
Hello student, Please find the answer to your question below Iam explaining every step again here Let d be the common difference in AP So d=a2-a1=a3-a2=a4-a3=........=a2m-a2m-1 Now a 1 2 -a...
  img
SHAIK AASIF AHAMED 2 months ago
 
Hello student, Please find the answer to your question below Let d be the common difference in AP So d=a2-a1=a3-a2=a4-a3=........=a2m-a2m-1 Now a 1 2 -a 2 2 +..............+a 2m-1 2 -a 2m 2...
  img
SHAIK AASIF AHAMED 2 months ago
 
I didn’t understood this step ) 1 -a 2m )/(a 2 2m -a 2 1 )=dm(a 2 2m -a 2 1 -dm(a plzz...explain And also in this step )=-d(a1+a2+.........+a2m) 2m -a 2m-1 )(a 2m +a 2m-1...
 
Shibashis Mallik 2 months ago
a,b belong to N and a>1. p is prime .ax^2+bx+c=p for 2 distict integral values of x then the number of integral roots of ax^2+bx+c=2p?
 
 
Hello student, Please find the answer to your question below If a = b = N, then the roots of ax^2 + ax + c - p are -1/2 sqrt(1 - 4(c - p)/a)/2 which implies 1 - 4(c - p)/a is an odd square =...
  img
SHAIK AASIF AHAMED 2 months ago
 
Let m, n be the two integer valued roots of the quadratic ax 2 +bx+c-p = 0, so that ax 2 +bx+(c-p) = a (x-m)(x-n) . Let x=N be an integer such that aN 2 +bN+(c-p) = p, then a(N-m)(N-n) = p....
 
mycroft holmes 2 months ago
if f(x)=x^4+x^3-2x^2-8x then which of the following are true?(a)f(x)=0 has 2 real roots . (b)f(x)=0 has real roots in (-1,2) sum of real roots of f(x)=0 is 2 (d) product of real roots isof...
 
 
Hello student, Please find the answer to your question below Iam unable to interpret your query.i think some part of the question is missing here because check whether constant term is...
  img
SHAIK AASIF AHAMED one month ago
 
Is there any constant term in the given polynomial? If there is no constant, then one of the roots will be ‘0’ and the other root is ‘2’. Other roots are complex. No. of real roots = 2 Sum...
 
Y RAJYALAKSHMI 3 months ago
What is the sin rule?
 
 
Hello Student, Thanks & Regards Arun Kumar Btech, IIT Delhi Askiitians Faculty
  img
Arun Kumar 3 months ago
If f(x)=tan 2 (πx/(n 2 -5n+8))+cot(n+m)πx; (n€N,m€Q),is a periodic function with 2 as the fundamental period,then m can’t belong to:
 
 
Ans: Period of tan 2 (ax): Period of cot(ax): Period of f 1 (x): Period of f 2 (x): Period of f(x): ‘m’ can’t belong to: Thanks & Regards Jitender Singh IIT Delhi...
  img
Jitender Singh 3 months ago
evaluate ∫ (1 – cos 2x) / (1 + cos 2x) dx
 
 
Ans: Hello Student, Please find answer to your question
  img
Jitender Singh 2 months ago
View all Questions »