Exercise 3.7

Let us consider Example 2 in Section 3.3, i.e., the cost of 2 pencils and 3 erasers is Rs 9 and the cost of 4 pencils and 6 erasers is Rs 18. Find the cost of each pencil and each eraser. i.e Let us consider Example 2 in Section 3.3 the cost of 2 pencils [...]

Aftab tells his daughter, “Seven years ago, I was seven times as old as you were then. Also, three years from now, I shall be three times as old as you will be.” (Isn’t this interesting?) Represent this situation algebraically and graphically. "Seven years ago Aftab tells his daughter I shall be three times as [...]

Solve the following pair of equations by substitution method: 7x – 15y = 2, x + 2y = 3 Solve the following pair of equations by substitution method: 7x – 15y = 2 x + 2y = 3 October 3, 2020 Category: Chapter 3 - Pair of Linear Equations in Two Variables , Exercise 3.7 [...]

Champa went to a ‘Sale’ to purchase some pants and skirts. When her friends asked her how many of each she had bought, she answered, The number of skirts is two less than twice the number of pants purchased. Also, the number of skirts is four less than four times the number of pants purchased. [...]

Graphically , find whether the following pair of equation has no solution ,unique solution or infinitely many solution 5x – 8y + 1 = 0 3x – 24/5y + 3/5 = 0 find whether the following pair of equation has no solution Graphically unique solution or infinitely many solution 5x - 8y + 1 = [...]

Check whether the pair of equations x + 3y = 6 and 2x – 3y= 12 is consistent. If so, solve them graphically. Check whether the pair of equations x + 3y = 6 and 2x – 3y= 12 is consistent. If so solve them graphically. October 3, 2020 Category: Chapter 3 - Pair of [...]

Two rails are represented by the equations x+ 2y – 4 = 0 and 2x+ 4y 12 = 0.Represent this situation geometrically. Two rails are represented by the equations x+ 2y - 4 = 0 and 2x+ 4y 12 = 0.Represent this situation geometrically. October 3, 2020 Category: Chapter 3 - Pair of Linear Equations [...]

Romila went to a stationery shop and purchased 2 pencils and 3 erasers for Rs 9. Her friend Sonali saw the new variety of pencils and erasers with Romila, and she also bought 4 pencils and 6 erasers of the same kind for Rs18. Represent this situation algebraically and graphically. and she also bought 4 [...]

Let us take the example given in Section 3.1. Akhila goes to a fair with Rs 20 and wants to have rides on the Giant Wheel and play Hoopla. Represent this situation algebraically and graphically (geometrically). -378x + 152y = -604 Solve the following pair of linear equations: 152x - 378y = - 74 October [...]

ABCD is a cyclic quadrilateral (see Fig. 3.7). Find the angles of the cyclic quadrilateral. ABCD is a cyclic quadrilateral (see Fig. 3.7). Find the angles of the cyclic quadrilateral. October 3, 2020 Category: Chapter 3 - Pair of Linear Equations in Two Variables , Exercise 3.7 , Maths , NCERT Class 10 ,