For 9 std My sum on topic "Identities"

Hint: (1) Transpose the linear algebraic expressions to denominators.

For 9 std. My sum on Statistics topic

A data arranged in ascending order has four variates. The middle 2 variates are 29 and 31. Mean and range of the data are 30 & 14 respectively. Find first and fourth variates i.e. extremes in the data.

8 Std sum on area 2 dimensional mensuration

Find side of the square whose area is same as sum of area of two rectangles; one with length 41 and breadth 3, and other with respective dimensions as 23 and 2. All dimensions in same unit.

Example of inverse variation, area of triangle

In triangle ABC, AB=35, AC=75 & BC=100 cm, find
(1) Area of the triangle
(2) AP, BQ and CR if these are perpendiculars from A,B and C on their opposite sides
(3) Verify example of inverse variation.
For a given triangle, height is in inverse proprtion to base.