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Answered on 19/11/2016 Tuition/Class IX-X Tuition Tuition/Class IX-X Tuition/Mathematics Linear Equations

For what value of k, do the equations 3x - y + 8 = 0 and 6x - ky = -16 represent coincident lines?

Vimala R.

Maths Teacher

The value of k should be equal to 2, and thus the equations, 3x - y + 8 = 0 and 6x - ky = -16 represent coincident lines

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Answered on 02/12/2016 Tuition/Class IX-X Tuition Tuition/Class IX-X Tuition/Mathematics Linear Equations

What type of solution does the pair of equations have: x + 2y + 5 = 0, -3x - 6y + 1 = 0?

Sreedevi A.

Entusiastic Teacher

On observing the given equations, we can say that the ratio of coefficients of 'x' and 'y' terms is same...

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Answered on 01/12/2016 Tuition/Class IX-X Tuition Tuition/Class IX-X Tuition/Mathematics Linear Equations

The line represented by x = 7 is parallel to the x - axis. Justify whether the statement is true or not?

Sachin Prasad

Math Tutor

No. It is parallel to y-axis.

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Answered on 07/12/2016 Tuition/Class IX-X Tuition Tuition/Class IX-X Tuition/Mathematics Linear Equations

Write a pair of linear equations which has the unique solution x = -1, y = 3. How many such pairs can you write?

Sreedevi A.

Entusiastic Teacher

x+y=2 and x-y+4=0. The solution of pair of linear equations is (-1,3). We can write many equations like this.

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Answered on 07/12/2016 Tuition/Class IX-X Tuition Tuition/Class IX-X Tuition/Mathematics Linear Equations

Solve: x + y = 3.3, 0.6 / (3x - 2y) = -1, 3x - 2y = 0?

Shambhavi S.

The second equation is undefined as denominator is 0, which is not possible. Thus these set of equations...

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Answered on 30/11/2016 Tuition/Class IX-X Tuition Tuition/Class IX-X Tuition/Mathematics Linear Equations

Two years ago, salim was thrice as old as his daughter and six years later, he will be four years older...

Chilla Rajesh

Math Trainer

Father=14 and Child= 6.

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Answered on 24/11/2016 Tuition/Class IX-X Tuition Tuition/Class IX-X Tuition/Mathematics Linear Equations

A person, rowing at the rate of 5 km/hr in still water, takes thrice as much time in going 40 km upstream...

Digant Saurabh Singh

Serve-Well Engineer

2.5 km/hr.

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Answered on 04/12/2016 Tuition/Class IX-X Tuition Tuition/Class IX-X Tuition/Mathematics Linear Equations

A motorboat can travel 30 km upstream and downstream 28 km in 7 hrs. It can travel 21 km upstream and...

Saurabh Gaur

Maths Wizard

Let speed of boat is x km/hr: speed of stream is y km/hr downstream = x+y upstream = x-y therefore...

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Answered on 25/11/2016 Tuition/Class IX-X Tuition Tuition/Class IX-X Tuition/Mathematics Linear Equations

The father s age is six times his son s age. Four years hence, the age of the father will be four times...

Shikha Yadav

Tutor

Let son's age be x . Then father's age = 6x 4(x+4)=6x+4 4x+16-6x-4=0 -2x+12=0 x=-12/-2 =6 Son's age =6,...

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Answered on 07/12/2016 Tuition/Class IX-X Tuition Tuition/Class IX-X Tuition/Mathematics Linear Equations

A two digit number is obtained by either multiplying the sum of the digits by 8 and then subtracting...

Sreedevi A.

Entusiastic Teacher

The number is 83.

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