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3. For what value of k, the pair of linear equations 3x+y=3 and 6x+ky=8 does

not have a solution.

1

4. If 3 chairs and 1 table costs Rs. 1500 and 6 chairs and 1 table costs Rs.2400. Form

linear equations to represent this situation.

1

5. Which term of the A.P. 27, 24, 21,…..is zero?

OR

In an Arithmetic Progression, if d= - 4, n=7,an=4, then find a.

1

6. For what values of k, the equation 9x2+6kx+4=0 has equal roots?

7. Find the roots of the equation x2+7x+10=0

OR

For what value(s) of ‘a’ quadratic equation 30

2 − 6 + 1 = 0 has no real

roots?

1

8. If PQ=28cm, then find the perimeter of ∆PLM 1

9. If two tangents are inclined at 60˚ are drawn to a circle of radius 3cm then

find length of each tangent.

OR

PQ is a tangent to a circle with centre O at point P. If ∆OPQ is an isosceles

triangle, then find ∠OQP.

76

Betty Jones

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