Important question of Class 10 Math and Science

 1. The Graph of Equation 5x - 2y + 1 = 0 and 4y -3x +5 = 0, Intersect at a Point (a,b). Write the value of (2a-3b) 

2. Write all about Ozone 

3. If Sn Denote the Sum of the  n term of AP Prove that S₁₂ = 3(S₈ -S₄) 

4. Find the value of “x” in the polynomial 2a2 + 2xa + 5a + 10 if (a + x) is one of its factors