Total Price:

There are no items in this cart.
Continue Shopping

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

3 years ago


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

3 years ago

3x + 6y = 21

or, x+2y=7





Inconsistent equations. No solution.

3 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
To Win!!!
Click Here for details
If 9th, 13th and 15th terms of an arithmetical progression are the first three terms of a geometric series whose sum of infinite terms is 80, then find the first term for A.P and also for...
let the first term of an AP be a and the common difference be d 9 th term=a+8d 13 th term=a+12d 15 th term=a+14d for a gp the first term -a+8d 2 term-a+12d 3 rd term-a+14d we have...
Sunil Kumar FP 4 months ago
question is in image
Using logarithm property the given equation can be written as: Also using the domain of log x which is define only when x > 0 , we get from three log functions that x > -2 , x <4...
Satyajit Samal 6 months ago
At what values of 'a' do all the zeroes of the function, f(x) = (a-2)x 2 + 2ax + a + 3 lie on the interval (-2, 1)?
Hi, You need to consider 2 cases here. Case 1 : Take a-2>0 Now the concavity is upwards, draw the desired graph and think about the conditions. We need f(-2)>0 f(1)>0 \ But this is...
Yash Baheti 6 months ago
The answer includes {2} . But leading coeff. is not equal to 0. Am i right ???
piyush soni 6 months ago
If the lines joining origin and point of intersection of curves ax 2 +2hxy+by 2 +2gx=0 and a1x 2 +2h1xy+b1y 2 +2g1x=0 are mutually perpendicular,then prove that- g(a1+b1)=g1(a+b)
a petty question on homogenization of equation. ax 2 +2hxy+by 2 +2gx(1)=0 ...1 a1x 2 +2h1xy+b1y 2 = -2g1x ...2 a1x 2 +2h1xy+b1y 2 /(-2g1x)=1 ...3 now replacing 1 in eq 1 by a1x 2 +2h1xy+b1y...
Agniva Kolay 8 months ago
Incident ray is along the unit vector v and the reflected ray is along the unit vector w . The normal is along unit vector a outwards. Express w in terms of a and v.
Hello Student, v is unit vector along the incident ray and w is the unit vector along the reflected ray. Hence a is a unit vector along the external bisector of v and w. w-v=ka...
Arun Kumar 8 months ago
a line passes through a point with position vector i(cap)-2j(cap)-k(cap) and is parallel to the vector i(cap)-2j(cap)+2k(cap) find the distance of point p(5,0,-4) from the line and how?
The equation of line with the given conditions : (x - 1)/1 = (y+2)/-2 = (z+1)/2 Now calculate the distance of this line from the point p by distance formula. Simple Thanks Bharat Bajaj...
bharat bajaj one year ago
View all Questions »