CBSE Class 9 - Formation of Linear Equations Videos

• Which of the following equations are linear equations in two variables and which are not? i) 2x+5=0 ii) 5x+6y=3z iii) 5x2-3y²+4=0 iv) 4y = 7
• A lending library has a fixed charge for the first three days and an additional charge for each day there after. Neeru paid Rs. 21 for a book kept for five days . Write a linear equation which satisfies this data. Draw trhe graph for the same.
• Two cell phone companies offer different packages. Company A charges a fixed monthly fees of  Rs 34 plus Rs 0.5/ minute talk time. Company B charges a fixed monthly fees of Rs 40 plus Rs  0.4 / minute talk time. Take x as the charges per minute for the talk time and y as the total amount. Based on above information answer the following question: (i) Linear equations representing the packages of a company A and B are : (a) y=34 + 0.5 x, y= 40 +0.4 x (b) y=34 + 0.4 x, y= 40 +0.5 x (c ) x=34 + 0.5 x, y= 40 +0.4 y (d) x=34 + 0.4y, y= 40 +0.5y (ii) If the average number of minutes used monthly by Sunil is 1160, then which of the  following is true? (a) Company A offers the better package (b)Company B offers the better  package (c ) Both companies offer the same package (d) None of the above (iii) If Sunita pays a total bill of Rs 208 to company B then the number of minutes used  by her : (a) 400  (b) 420 (c) 410 (d)390 (iv) The shape of the graph represented by the equations in part (i) is : (a) Rectangle (b) Circle (c) Parabola (d) Pair of lines (v) The number of minutes of talk time that results in equal monthly bills from both the  companies is : (a) 50  (b) 60  (c) 55  (d)65  
• if this is a ball that cost 20 ruppe and a bat that cost 100 ruppe but the bat cost 10 ruppe more what is the total cost of ball and bat ?
• The car is moving with a speed of 60 km/h, travels y km distance in x hours. Represent this statement as a linear equation of two variables and draw the graph. Read from the graph, distance travelled when time is (i) 5 hours, (ii) 10 hours.
• what is linear equations
• Express 2x = 5y in the form ax + by + c = 0Express 2x = 5y in the form ax + by + c = 0Express 2x = 5y in the form ax + by + c = 0
• The number of girls in class IX is 2 more than thrice the number of boys.  Represent the above statement by a linear equation in variables ‘x’ and   ‘y’.
• In △ABC and △DEF , AB = FD , and ∠A = ∠D . The two triangles will be congruent by SAS axiom if
• The point (m, -m) always lies on the line. x=m y=-m x+y=0 x=y

Queries asked on Sunday & after 7 pm from Monday to Saturday will be answered after 12 pm the next working day.