I have downloaded the app but it is not working properly so,what should i do
find the equation of line passing through(3,20 which are at an angle 45 degree with the line x-2y=3
10 students of Class X took part in a Mathematics quiz. If the number of girls is 4 more than the number of boys, find the number of boys and girls who took part in the quiz. (ii) 5 pencils and 7 pens together cost ` 50, whereas 7 pencils and 5 pens together cost ` 46. Find the cost of one pencil and that of one pen