Question

Give me answer very quickly I will give you 50 points. I am in 9th class. ​

Answer 1

Answer:

First put the value of x in the first sum and rationalise and then add both.

Use heron's formula in the second sum underroot s*(s-a)*(s-b)*(s-c).

Find x by linear pair in the 3rd sum and then find z by linear pair and y can be found by linear pair with z or angle 30.

First use alternate angles in the fourth sum and the angle beside 2x will get 3x and then add them as they form linear equations and you will get the value of x.

You can take the first two equations that are added as a and the equation after substracting b and solve it by (a-b) the whole square.

In the 1st sum of the sixth question youcan use te formula acube - bcube

2nd you can use (a-b) the whole square.

3rd you can solve by removing common factors x in the first bracket and 3 in the second.

Answer 2

Answer:First put the value of x in the first sum and rationalise and then add both.Use heron's formula in the second sum .Use herons formula in the second sum underfoot s*(s_a)*.