Notesale: Turn your study into money

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1
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If ax + by = a2 – b2 and bx + ay = 0, find the value of (x + y)
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For what value of k, the pair of equations 4x – 3y = 9, 2x + ky = 11
has no solution? (2017D
4
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(2012)
5
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Check graphically whether the pair of equations 3x – 2y + 2 = 0
and 32x – y + 3 = 0, is consistent
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7
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8
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Solve the following pair of linear equations for x and y:
141x + 93y = 189;
93x + 141y = 45 (2013)
10
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Solve: xa+yb = a + b; xa2+yb2 =2, a, b ≠ 0 (2017OD)
12
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(2014)

13
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A man earns ₹600 per month more than his wife
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Find their incomes
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The sum of the digits of a two digit number is 8 and the difference
between the number and that formed by reversing the digits is 18
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(2015)
16
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After 20 years, his age will be equal to the sum of the ages of his
children
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(2012)
17
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The
number formed by reversing the digits is 18 less than the given
number
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(2013)
18
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It goes 30 km upstream
and returns back at the same point in 4 hours 30 minutes
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2017D

19
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The taxi charges in city comprises of
fixed charges together with the charge for the distance covered
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What will a person have to pay for travelling a distance of 30 km?
(2014)
20
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He takes 4
hours if the travels 60 km by train and the rest by car
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Find
the speeds of the train and the car separately
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Draw the graphs of following equations:
2x – y = 1; x + 2y = 13
Find the solution of the equations from the graph and shade the
triangular region formed by the lines and the y-axis
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Amit bought two pencils and three chocolates for ₹11 and
Sumeet bought one pencil and two chocolates for ₹7
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Find the price of
one pencil and that of one chocolate graphically

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