Fill in the blanks
`x/5 =y/3 =(x+y)/square =(3x+5y)/(square)`

Square of 3x – 4y is

Fill in the blanks (f) Line 5x – 3y = 12 cuts y-axis at _________.

Complete the following activity to solve simultaneous equations : 4x+ 3y = 18 " "...(1) 5x - 3y = 9 " " ...(2) Adding equations (1) and (2) , +{:(4x+3y=18" ...(1)"),(5x-3y=9" ...(2)"),(bar(squarex" "=square)):} :. X = (square)/(square ) " " :. X = square Substituting x = 3 in equation (1) , 4 xx square + 3y = 18 " " :. 3y = 18 - square " " :. 3y = square :. y = 2 (x,y ) = (square, square ) is the solution

Mean of x= 25 Mean of y =20 sigma_x = 4 sigma_y=3 r = 0.5 b_(yx) = square b_(xy)= square When x = 10 y-square=square(10 - square) :. y = square

Fill in the blanks (e) Angle between lines 5x + y = 7 and –x + 5y = 9 is _______.

Complete the following: 2x+y=8 x: 0, square , 3 y: square , 4, 2 (x,y): square , square , (3,2) x-y=1 x: square , 2, square y: -1, square , 4 (x,y): square , square , square

(i) x+y=12. Find y if x=5. (ii) x+3y=-4 therefore x = ……… …. (Fill in the blanks.) (iii) Find x, if x+y=5 and x-y=7.

Mean of x= 53 Mean of y = 28 Regression coefficient of y on x = - 1.2 Regression coefficient of x on y= - 0.3 When y = 25 x-square=square(25- square) :. x = square